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Tytuł:
Performance evaluation of a single cylinder compressed air engine: an experimental study
Autorzy:
Hanan, Ahmad
Feroze, Tariq
Arif, Awais
Iftikhar, Hasan
Khan, Afzaal A.
Javaid, Sarmad
Powiązania:
https://bibliotekanauki.pl/articles/2105994.pdf
Data publikacji:
2022
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
internal combustion engines
compressed air engine
engine analysis
single cylinder engine
Opis:
The quest to reduce dangerous environmental emissions has led to the research and use of alternate and renewable energy sources. One of the major contributors to the dangerous environmental emissions is the automotive industry. The world is, therefore, quickly moving towards hybrid and electric vehicles. An alternate pollution-free automotive engine is a compressed-air engine, which is powered by compressed air and is more efficient than the electric engine since it requires less charging time than a traditional battery-operated engine. Furthermore, the tanks used in compressed-air engines have a longer lifespan in comparison to the batteries used in electric vehicles. However, extensive research is required to make this engine viable for commercial use. The current study is a step forward in this direction and shows the performance analysis of a single-cylinder compressed-air engine, developed from a four-stroke, single-cylinder, 70 cc gasoline engine. The results show that compressed-air engines are economic, environmental friendly and efficient.
Źródło:
Acta Mechanica et Automatica; 2022, 16, 2; 119--123
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of vibroacoustic properties of the 250-C20R/2 RRC (Allison) engine in the support surface of the compressor
Autorzy:
Kowalski, M.
Powiązania:
https://bibliotekanauki.pl/articles/247973.pdf
Data publikacji:
2014
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
vibroacoustic properties
engine vibration analysis
Opis:
The paper presents an analysis of the levels of vibration on the compressor in the support surface of the American RRC Allison 250-C20R engine built into the SW-4 Puszczyk helicopter. Then, it presents the association of occurring vibrations with their source of origin, and also the comparison of their values with the limit values specified in the operating manual of the helicopter. The methodology of the conducted research and analyses are explained. The essential elements preceding the research, such as determining time courses, on the basis of which the most important parts to conduct the detailed analyses of changes of the basic parameters and compliance with technical conditions, are defined. Moreover, the theoretical issues in terms of determination and description of the characteristic parameters of mechanical vibrations are briefly presented. The typical terms used in the procedures of vibration, description and measurements are explained. The importance of the interpretation of measurements is quite significantly emphasised and the components of the main engine, which were subject to measurement, are indicated. The difficulties in the identification of the vibration due to the high probability of overlapping of vibrations coming from several elements are emphasised. Next, the methodology of measurement is described, in which, among others, mounting points of vibration sensors are presented. The final part of the paper is mainly a graphical presentation of the results, on the basis of which the conclusions are developed. The conclusions show a lack of decisive symptoms indicating the danger at the level of vibrations, and present the future directions of work, which will allow for a more detailed analysis.
Źródło:
Journal of KONES; 2014, 21, 4; 281-288
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of nondimensional arguments in dimensional functions of ship propulsion engine operation
Autorzy:
Rosłanowski, J.
Charchalis, A.
Powiązania:
https://bibliotekanauki.pl/articles/246528.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ship propulsion engine operation dimensional analysis
dimensionless arguments in dimensional functions
Opis:
The following article describes different ways for determining dimensionless arguments in dimensional functions of ship propulsion engine operation. Dimensional space has also been characterized in relation to properties it possesses. An attention has been paid to the fact that it creates Abelian group, where involution fulfils multiplication axiom by scalar, and positive numbers that belong to dimensional space create dimensionless subspace. The conception of dimensional dependence has also been explained. There are also described conditions, which should be fulfilled by dimensional quantities to be dimensionally independent. Fundamental theorems of dimensional analysis have also been characterized. There is also given the definition of dimensional function of ship propulsion engine operation concerning values and dimensional arguments. It has been explained what requirements are to be fulfilled. One can also learn what limitations are imposed on dimensional function of ship propulsion engine operation concerning dimensional homogeneity and invariance. The ways of dimensional function transformation into a numerical one have been described. In addition, some conditions have been given which must be applied at given method of dimensional function transformation. An attention has been paid to the fact that dimensionless arguments are similarity invariant as a result of transformation by the similarity method of mathematical model of ship propulsion engine operation. In this study, the ship propulsion engine performance is expressed by product of Joule and second interpreted as transfer of energy in the form of work. Identification of ship propulsion engine operation by dimensional analysis performed in terms of its usefulness for diagnosis of ship propulsion engines. The basic problem of marine diesel exploitation is the monitoring of its technical condition. Diagnosis of marine diesel propulsion increases the safety of the ship and thus protects the marine environment against pollution.
Źródło:
Journal of KONES; 2015, 22, 2; 185-190
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CI engine as a case study of thermomechanical FE analysis of the piston - piston rings - cylinder system
Autorzy:
Szurgott, P.
Niezgoda, T.
Powiązania:
https://bibliotekanauki.pl/articles/247997.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
engine piston
composite piston
thermomechanical analysis
FE analysis
Opis:
The compression-ignition engine as a case study of a methodology of the numerical modelling and simulation of the piston - piston rings - cylinder system was presented in the paper. Thermomechanical FE analysis, taking into account thermal and mechanical loads, was carried out using the MSC.Marc/Mentat software. The mechanical loads included loads due to inertial and gas forces as well. A three dimensional solid geometrical model of the considered set was developed using AutoCAD software, whereas the finite element mesh was generated using Altair HyperMesh. Kinematic boundary conditions - the vertical displacement and acceleration of the piston - were described by the corresponding curves as a function of time for selected engine speed. Changes in pressure on the piston crown were estimated based on data from the engine manufacturer and the corresponded indicator diagram available in the literature. The results of thermomechanical FE analysis were presented in the form of stress and/or displacement contours. The main aim of the analysis was to determine the deformation of the piston depending of on the piston material. Two types of material were compared - the actual one PA12 aluminum alloy and the new composite material with low hysteresis. The second material was characterized by slight differences of the coefficient of thermal expansion for heating and cooling.
Źródło:
Journal of KONES; 2012, 19, 1; 399-406
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Number of measurement cycles and accuracy of engine indication process
Autorzy:
Adamski, W.
Brzozowski, K.
Nowakowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/243903.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
CI engine
measurement
pressure
statistical analysis
Opis:
The results of measurements of instantaneous pressure in the cylinder are most often inputs tofurther calculations of the characteristic parameters of the working cycle of the engine. Many repetitions of measurements always feature a degree of unrepeatability in registered cycles, making determination of the so called representative round difficult. The paper considers the problem of estimating the minimal number of measurement cycles for the registration of pressure in order to obtain a representative course ofpressure in the cylinder of an compression ignition engine. Maximum pressure was adopted as an indicator of cycle repeatability. After excluding systematic errors, repetition ofmaximum pressures recorded in subseąuent measurement cycles were analyzed for fixed load and rotation speed of the engine, defining the coefficient ofvariation CV. subsequently, for selected states of the engine the representativeness of the average maximum pressure depending on the number of measurement cycles averaged was examined. full evaluation of the accuracy of the indication process in relation to the number of averaged measurement cycles reauires also determination of the so called expanded uncertainty of the measurement's result. Further analysis including determination of the expanded uncertainty of the measurement result revealed that pressure course averaging over 20 consecutive cycles of measurement is sufficient to obtain a representative cycle.
Źródło:
Journal of KONES; 2010, 17, 3; 9-16
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sprzężona temperaturowo-przemieszczeniowa analiza numeryczna MES elementów silnika ZS
Thermally coupled FEM analysis of diesel engine components
Autorzy:
Dębski, H.
Jonak, J.
Powiązania:
https://bibliotekanauki.pl/articles/387622.pdf
Data publikacji:
2009
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
analiza numeryczna
analiza MES
silnik
numerical analysis
MES analysis
engine
Opis:
Praca zawiera wyniki analizy numerycznej w ujęciu metody elementów skończonych rozkładów naprężeń, temperatur oraz odkształceń w elementach silnika diesla ZS. Zakres obliczeń obejmował sprzężoną analizę temperaturowoprzemieszczeniową elementów konstrukcji z uwzględnieniem zagadnień geometrycznie nieliniowych oraz liniowosprężystych własnościach materiałowych. Istotne znaczenie w procesie prowadzonych obliczeń miało zastosowanie analizy sprzężonej, umożliwiającej jednoczesne uwzględnienie zagadnień termicznych oraz wynikających z nich efektów naprężeniowych. Takie podejście umożliwia prowadzenie kompleksowej analizy konstrukcji obciążonych cieplnie, jednakże wiąże się to z koniecznością zastosowania specjalnych typów elementów skończonych, posiadających dodatkowy stopień swobody pozwalający na uwzględnienie zagadnień termicznych.
The paper contains results of numerical analysis of stress, temperature and deformation distributions in diesel engine components, performed by means of MES. The scope of calculations include thermally coupled analysis of structural components, in which linear elastic properties and geometrically nonlinear problems were taken into account. The application of thermally coupled analysis, which enabled to consider simultaneously thermal fields and related deformation distributions, had a significant effect on the results obtained. Such approach enables to carry out a complex analysis of thermally loaded structures and requires application of special type elements with an additional degree of freedom to take thermal problems into consideration.
Źródło:
Acta Mechanica et Automatica; 2009, 3, 2; 19-21
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of mileage to engine oil removing in the natural exploitation of passenger cars
Analiza przebiegów do wymiany oleju silnikowego w eksploatacji naturalnej samochodów
Autorzy:
Sitnik, L. J.
Powiązania:
https://bibliotekanauki.pl/articles/245595.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
eksploatacja
silnik pojazdu
olej silnikowy
czasokres
exploitation
car engine
engine oil
lifetime
analysis
Opis:
Leading to reformation of proecologic abilities of transport's vehicles and especially cars vehicles are connected with properly economy of the working liquids. It intakes should be optimal. This postulate is working in an activity of cars' tycoons and producers of working liquids. In this case a good example is lifetime of engines' oils. By one hand it leads to lengthen of engine's oil lifetime by improvement of its abilities, by second hand producers are limiting time of oil's change but admittedly that mileage is constantly rising. Everything it leads to constantly drop of the oil's unit consumption. There are exist extra possibilities of improving an oil consumption if oil's unit consumption treats like proecologic parameter. The base of that are changes in oil lifetime based on exploitations' terms for particular copy of vehicle. By one hand it secures of properly use car vehicle by second hand it resists the human factor in exploitation process, thanks that it excludes situations where oil will be changed to early - as a consequence of extra consumption or to late - as a probability of engines' damages. From the analysis of solid constant mileage to change engine's oil comes how big problem is it. Properly researches and conclusions presented in this publication.
Dążenie do poprawy proekologicznych właściwości środków transportu, w tym samochodów osobowych, związane jest, między innymi, z prawidłową gospodarką płynami roboczymi. Ich zużycie powinno być optymalizowane. Postulat ten jest urzeczywistniany w działalności zarówno wytwórców pojazdów jak też producentów płynów eksploatacyjnych. Dobrym przykładem jest tu kwestia zużycia olejów silnikowych. Z jednej strony dąży się do tego by oleje mogły pracować jak najdłużej - ciągle doskonaląc ich właściwości, z drugiej producenci ograniczają przebiegi do ich wymiany, ale przyznać trzeba, że przebiegi te ulegają ciągłemu wzrostowi. Wszystko to prowadzi do nieustannego „jednostkowego" obniżania zużycia oleju silnikowego. Jeśli traktować jednostkowe zużycie oleju silnikowego jako parametr o znaczeniu proekologicznym to trzeba stwierdzić, że istnieją dalsze możliwości jego poprawy. Podstawową jest wprowadzenie elastycznych przebiegów do wymian oleju, wynikających z warunków eksploatacji konkretnego egzemplarza pojazdu. Z jednej strony zabezpiecza to właściwe użytkowanie pojazdu, z drugiej natomiast, powoduje znaczne ograniczenie ingerencji „ czynnika ludzkiego " w proces eksploatacji, a zatem pozwala wykluczyć sytuacje gdzie olej silnikowy wymieniany jest przedwcześnie - co skutkuje nieuzasadnionym jego zużyciem, lub zbyt późno - co wzmaga prawdopodobieństwo uszkodzeń silnika. O tym jak ważny jest to problem można przekonać się analizują dane dotyczące „sztywnych" przebiegów do wymiany oleju silnikowego. Odpowiednie badania i wynikające stąd wnioski, przedstawiono w niniejszej publikacji.
Źródło:
Journal of KONES; 2009, 16, 3; 367-373
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Nonuniformity of the Piston Motion of the Radial Engine
Autorzy:
Pietrykowski, K.
Tulwin, T.
Powiązania:
https://bibliotekanauki.pl/articles/118155.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
kinematic analysis
non-uniformity
piston motion
radial engine
Opis:
The results of kinematic analysis of the ASz-62IR radial engine crankshaft was presented. In addition, the one-dimensional model of the working cycle of the engine was created in AVL BOOST system. Differences in the waveforms for each pistons causes the differences in the filling process what reflects in the mass of the load supplied to cylinders. Additionally, due to one dimensional model computation. The results show differences in the value of maximum pressure. This causes differences in mean effective pressure of up to 4% and which also affects the vibrations of the whole engine.
Źródło:
Applied Computer Science; 2017, 13, 2; 39-47
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of novel composite alloys used for the engine pistons
Autorzy:
Kowalski, M.
Jankowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/949489.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
novel composite alloys
engine pistons
thermal derivative analysis
Opis:
The article presents the results of the investigations cover novel composite silumins with new alloying additives, such as chromium and molybdenum (not yet used in this type of silumin) and increased content of nickel and copper. The samples strength tests were performed at room temperature (20°C) and at elevated temperatures (up to 350°C), and were carried out using the strength machine, equipped with the special climate chamber. The dimensional stability of the new aluminum alloy was investigated using the precision dilatometer. This device allows one to register and record the sample dimensions as a function of temperature, during sample heating and cooling. During the DTA crystallization process investigations, derivative curves have been determined, that allows the analysis of the solidification process and the analysis of the heat transfer process in the sample structure and phase transformations. In the article shows the derivative curve and representative microstructures, and characteristic temperatures for the conventional AlSi12 alloy and novel composite alloy. All research results indicated that the newly developed composite aluminum alloy has far better parameters than aluminum alloys used previously for pistons of the internal combustion engines. This article concludes with a summary of the advantages of the new composite alloys.
Źródło:
Journal of KONES; 2017, 24, 4; 109-116
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An attempt of exhaust gases composition prediction in si engines powered by petrol and gaseous fuels
Autorzy:
Flekiewicz, M.
Kubica, G.
Flekiewicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/245747.pdf
Data publikacji:
2009
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
CNG
LPG
exhaust gases
SI engine
combustion analysis
Opis:
Optimization procedure of the si engines feeding systems requires the application of newer and more sophisticated tools, as an addition to well known but expensive experimental methods. Numerical methods can be considered nowadays as once playing the most important role in the combustion process analysis. Paper describes the application of the dual zone model, allowing the analysis of the combustion process in an SI engine with the possibility of estimating 10 different exhaust gases i.e.: CO2, CO, H2O O2, NO, N2, H2, H, O and OH. The research has been carried on a 1.6 litr es four cylinder SI engine, fed with petrol and alternatively with LPG and CNG. In-cylinder pressure for the 4th cylinder of the tested engine has been acąuired for several engine speeds. registered in-cylinder pressure traces p=p((fi), together with the volume variation nii=nii((fi) infunction ofcrank angle, were used in the combustion process simulating calculations. Obtained results made it possible to compare selected parameters describing the combustion process. Obtained results do also prove recognized fact related to the higher temperature necessary to initiate gaseous fuel combustion.
Źródło:
Journal of KONES; 2009, 16, 4; 105-113
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Composite alloy for IC engine pistons
Autorzy:
Jankowska-Sieminska, B.
Jankowski, A.
Sławinski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/246922.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engines
engine pistons
composite alloys
thermal analysis
Opis:
Aluminum is the most popular matrix for the metal matrix composites The Al alloys are attractive due to their low density, their capability to be strengthened by precipitation, their good corrosion resistance, high thermal and electrical conductivity, and their high damping capacity. The characteristics of metal matrix composite materials are determined by their microstructure and internal interfaces, which are affected by their production and thermal mechanical treatment. Investigations to improve the combustion piston engines arę leading to improve the working process performance by increase ofits parameters, especially the average temperature of the thermodynamic cycle. New piston consists of two parts manufactured of standard and composite materials are presented in the paper. Composite alloy has chemical composition of short fibre with Al2 O3 was following, in the mass percentage: 96% Al2 03, 4%, SiO2. As the binder the colloidal silica was used in quantity 5%. The volume of fibres in the insert was 22 plus or minus 2% by volume. Bending strength of the insert was 0.5 MPa. Temperature and stresses distribution in standard piston and different versions of composite pistons are introduced in the paper. The paper presents the resistance of investigated materials on thermal shocks. Experimental veriflcation of manufactured composite pistons in the engine proved the larger exhaust temperaturę for about 20-70°C, in comparison with the engine with standard pistons (that gives the greater effectiveness of turbo charging application), proved the lowering of a individual volume of gases blow-bys to the crankcase, the lowering of noise level, larger resistance on thermal loads.
Źródło:
Journal of KONES; 2010, 17, 2; 159-166
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The possibility of the SI engine CO2 emission reduction with the application of CNG-hydrogen blends
Autorzy:
Flekiewicz, M.
Kubica, G.
Flekiewicz, B.
Powiązania:
https://bibliotekanauki.pl/articles/248095.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
CNG
hydrogen
mixtures
Passenger car engine
combustion analysis
Opis:
The influence of hydrogen-methane blends application in SI engines on their CO2 emission is the main goal of this paper. The 1.6 litre engine alternatively fed with either petrol, CNG and with methane-hydrogen blends has been tested in the research program. The possibility of passenger car engine operation on H2-CH4 mixtures has been demonstrated in the paper, with the underlining of the potential of those mixtures in the increasing of the engine efficiency. Necessary changes in strategy of engine regulation, especially in air/fuel ratio, ignition advance and EGR rate, were noticed and prepared. The methane-hydrogen blends, which were used in the research programme featured ratios as follows: 5%, 10% and 15% of hydrogen. For selected engine operating points, following data has been acquired: in cylinder pressure variation, crank angle, manifold pressure and finally mass fuel consumption. On the basis of registered data for all fuels - burned temperature in cylinder has been estimated, as well as the charge combustion ratio, and the heat release rate. With help of mathematical model describing the exhaust gases formation it has been possible to estimate the NO, CO and CO2 emission level. Obtained results made it possible to compare the combustion process for all tested fuels and pointed on the significant influence of hydrogen percentage for the methane-hydrogen blends, on the CO2 emission reduction up to 20%. Negative aspects of chosen blends application have been also describe in the paper, especially of increasing engine thermal load.
Źródło:
Journal of KONES; 2008, 15, 3; 139-146
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of ignition timing advance on the CNG natural gas combustion in SI engine
Autorzy:
Flekiewicz, M.
Kubica, G.
Fabiś, P.
Powiązania:
https://bibliotekanauki.pl/articles/241679.pdf
Data publikacji:
2008
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
CNG passenger car engine
combustion analysis
ignition advance
Opis:
A significant reduction of CO2 emission in the road transport is a major challenge for next years. In the combination with efficient powertrain technologies, the potential of natural gas is excellent for comparably light and cost effective reduction of CO2 and toxic emission in the future [1-2]. As the CNG fuelling stations in Poland are not so far widespread enough to make a dedicated natural gas vehicle practical, it results necessary to start with proposing alternatively CNG powered engines. Such a bi-fuel automotive engines are necessary to bridge the gap between petrol and natural gas. As a sample of modern engine design an Opel 1.6 litre 4-cylinder engine has been selected as a base of powertrain for development of bi-fuelpassenger car engine. The influence of ignition timing on CNG combustion process has been presented in this paper. A 1.6 litre SI engine has been tested in the special program. For selected engine operating conditions, following data were acquired: in cylinder pressure, crank angle, fuel mass consumption and exhaust gases temperatures. For the settings of 6, 9, 12 and 15 deg crank angle timing advance correction, the internal temperature of combustion chamber has been estimated, as well as the charge combustion ratio and ratio of heat release were tested. With the help of the mathematical model, emissions of NO, CO and CO2 were additionally estimated. Obtained results made it possible to compare the influence of ignition timing advance on natural gas combustion in SI engine.
Źródło:
Journal of KONES; 2008, 15, 4; 123-131
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The comparative analysis of the selected construction types of axial compressor stage including the modal analysis
Autorzy:
Kozakiewicz, A.
Grzejszczak, O.
Lacki, T.
Powiązania:
https://bibliotekanauki.pl/articles/100091.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
modal analysis
jet engine rotating parts
BLISK
optimisation
Opis:
The article concerns the issues of the scope of optimization of the gas turbine jet engine. These issues include limiting the weight and number of engine parts. One way to reduce the weight and number of components, including the compressor assembly, is to use the BLISK's replacement construction. The replacement construction should meet the strength requirement and the vibration spectrum as well. The paper presents a comparative analysis of the influence of rotational speed on the characters and the vibration frequency of the single rotor stage of the high pressure compressor. The analysis was carried out for two different design solutions of the blade-disk connection: the classical and integral. The comparative analysis focused on three important from the point of view of operation, the engine operating ranges: work on the ground (idle) and work during take-off and climb the aircraft.
Źródło:
Journal of Machine Engineering; 2017, 17, 4; 91-97
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engine diagnosis based on vibration analysis using different fuel blends
Autorzy:
Grajales, J. A.
Quintero, H. F.
López, J. F.
Romero, C. A.
Henao, E.
Cardona, O.
Powiązania:
https://bibliotekanauki.pl/articles/328420.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
engine diagnosis
vibration analysis
frequency analysis
diagnostyka silnika
analiza drgań
analiza częstotliwościowa
Opis:
Fault diagnosis of an internal combustion engine is proposed herein by means of vibration analysis and a comparative analysis of normal operation and induced misfire scenarios. In order to validate previous works on misfire with pure gasoline, measurements also included tests performed with ethanol-gasoline fuel blends. According to results, changes in the fuel mix seem to have little impact on the performance and behaviour of the engine. And additionally, the particular frequency components that allowed differentiation between normal and faulty conditions were also present on all the fuel blends tested. Fast Fourier Transform was applied to obtain the frequency domain of the signal as a previous step to the subsequent identification process based on statistical characteristics extraction. A fuel blend classification method based on the analysis of the vibration signals of the engine was studied using envelope, Spike Energy and Peak Value techniques. Differentiation was possible with the extraction of the statistical features of the Peak Value spectrum of the longitudinal acceleration with a specific filter selection.
Źródło:
Diagnostyka; 2017, 18, 4; 27-36
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 121

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