Temat: combustion indicator - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Numerical investigation on the effects of fueling the Turbulent Jet Ignition gas engine with methane and hydrogen
Autorzy:: Pielecha, Ireneusz
Szwajca, Filip
Skobiej, Kinga
Powiązania:: https://bibliotekanauki.pl/articles/32103224.pdf
Data publikacji:: 2023-11-30
Wydawca:: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
Tematy:: hydrogen engine
engine simulation
hydrogen combustion
methane combustion
combustion indicator
turbulent jet ignition engine
Opis:: The modern solution of two-stage combustion, namely the Turbulent Jet Ignition (TJI), enables the combustion of ultra-lean mixtures. Thanks to this solution, it became possible to reduce fuel consumption and, at the same time, to increase the combustion process indicators (including the overall combustion system efficiency). The article presents the results of numerical tests of a heavy-duty engine equipped with the TJI system running on gas fuels. The AVL BOOST software was used to analyze the effects of different fuel injection rates into the pre-chamber and various ignition timing angles, while maintaining a constant global excess air ratio. Increasing the proportion of hydrogen in the prechamber resulted in its reduction in the main chamber (the fuel dose was kept constant with different excess air coefficients in each of the chambers). The maximum combustion pressure values in both chambers were investigated. Changes in the amount of heat released and its release rate were determined. As a result of the simulations, different ignition and combustion conditions were presented for the tested fuels. Based on this, maps of fuel dose to prechamber vs. ignition advance angle were drawn up, showing selected thermodynamic indicators of the combustion process.
Źródło:: Rail Vehicles/Pojazdy Szynowe; 2023, 1-2; 46-57
0138-0370
2719-9630
Pojawia się w:: Rail Vehicles/Pojazdy Szynowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Evaluation of current developments and trends in the diagnosis of marine diesel engines based on the indicator diagrams analysis
Autorzy:: Pawletko, R.
Polanowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/244253.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion pressure sensor
indicator diagram analysis
Opis:: The paper analyses the current offer of combustion pressure sensors for use on marine engines under operating conditions, methods of data acquisition, methods of determining TDC position and methods of obtaining diagnostic information from the indicator diagrams. Terms of continuous work on marine engines themselves only: new ABB cylinder pressure sensor, the piezoelectric sensors from KISTLER and AVL companies, but with limitations, the main ones being stability at high temperature. Another important issue for the accuracy of mean indicated pressure and heat released characteristics determination is referred to TDC position on the indicator diagrams. TDC is appropriate thermodynamic point, it is hardly determinable in the presence of interference and lack of sufficient information – but is used, for example in ABB solution. One of the sources of diagnostic information is to analyse trends in some parameters, which, unfortunately, is very difficult in environments with varying engine loads. Further progress in the diagnostic use of indicator diagrams should be associated with the use of the heat released characteristics and the net internal efficiency, which as shown by the results of preliminary tests can be used to assess the accuracy of the injection and combustion of fuel, including gas fuel. Supplementing these methods may be the use of vibration and noise to detect certain malfunctions.
Źródło:: Journal of KONES; 2014, 21, 4; 389-396
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The Fourier transform as a new approach of evaluating the internal combustion engine indicator diagram
Autorzy:: Łoza, Ł.
Sitnik, L. J.
Powiązania:: https://bibliotekanauki.pl/articles/244677.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: indicator diagram
Fourier transform
internal combustion engine
Opis:: In this paper, the authors present an introduction to the new method of evaluating the indicator diagram of internal combustion engine. For several years, it was observed that analyses of combustion processes have been hardly changed since they were conducted for the first time. At the moment, the diagrams are plotted more and more precisely owing to the new sensors and digital processors. Despite all of these high technical advantages, which were obviously unavailable in the past, theoretical approach for describing indicator diagram has not changed in significant way. Nowadays, the indicator diagrams are still evaluated very generally and are presented in much too idealistic way as a smooth curve of pressure changes, without any disturbances, which are being detected very easily now. Furthermore, it appears that performance improvements of the IC engines are in need of developing new methods for analysis and evaluation. The Fourier transform is a new way to look at the combustion process in the engines. It is basically a mathematical instrument for analysing different types of signals, which are transformed, from time domain into frequency domain. It enables identifying specific sinusoidal components of arbitrary signals and separates relevant ones from the noise. This allows one to see significant differences in two or more apparently similar signals and detect the crucial parts. If we treat pressure changes in time like a common signal, we can compute Fourier transform and see basic components of the diagram.
Źródło:: Journal of KONES; 2017, 24, 4; 173-180
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Novel method appointing of the effective heat release coefficient during combustion process based on real indicator diagram
Autorzy:: Jankowski, A.
Ambrozik, A.
Jankowska-Sieminska, B.
Ślęzak, M.
Powiązania:: https://bibliotekanauki.pl/articles/244287.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engine
working cycle
thermodynamics
indicator diagram
heat release
Opis:: An object of the paper is a novel method of effective heat release coefficient appointing during combustion process of the based on the real indicator diagram. The process quality of the heat release during process of combustion is evaluated by value of the effective heat release coefficient. Accepted assumptions at appointing effective coefficient of heat release refer to acceptable that thermodynamical parameters of the working charge according to points of the real indicator diagram and the computational diagram are such the same, the maximum pressure of real working cycle of the engine is equal to the pressure of the computational cycle, work of the working charge performed in period from point of closing of the inlet valve to point of the beginning of the exhaust process are for both considered working cycles equal, heat values of the carried to the real and computational cycle are such the same. The method of appointing of the self-ignition delay period is presented in the paper, using to this end intersection point of two graphs of temperature course of the working charge prepared for the first phase of combustion process. Other methods appointing characteristics is suggested in paper basing on the real indicator diagram. The graphic illustration of the preparing method of characteristics of the relative quantity of the heat release during combustion process is illustrated in paper.
Źródło:: Journal of KONES; 2007, 14, 4; 133-142
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Examination of fast-changing quantities in engine with common rail injection system
Autorzy:: Ambrozik, A.
Ambrozik, T.
Kurczyński, D.
Łagowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/243895.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion engines
common rail
multi-phase injection
indicator diagram
Opis:: The paper aims to present the results of investigations into the engine with Common Rail system that performs multi-phase injection. The scope of investigations included measurements and assessment of fast-changing quantities. The paper provides the research stand description and a block diagram o f the system for taking measurements offast-changing quantities, including the system measuring the intensity of the current that controls the injector operation. The experimental results discussed in the paper were derived from introductory investigations into measurements of the air-fuel mixture pressure in the engine cylinder and those of the injector needle lift, which were assessed on the basis of measurements of the intensity of the injector-controlling current. Tests were performed while the engine operated under external speed characteristics and under load characteristics at the crankshaft rotational speed n=l200 rpm and n =3800 rpm. During tests, depending on speed and load characteristics of the engine operation, the ECU performed different strategies of fuel injection. The fuel injection control system madę it possible to complete three injection stages in a single work cycle of the internal combustion engine (pilot injection, pre-injection and the main injection). The maximum fuel pressure in the common rail amounted to 160 MPa. The engine was fuelled by commercial diesel oil.
Źródło:: Journal of KONES; 2010, 17, 3; 17-24
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Evaluation accuracy of combustion chamber tightness in piston engines, on the basis of a developed indicator diagram
Autorzy:: Rosłanowski, J.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/246594.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: leakage of combustion chamber
errors of developed indicator diagrams
characteristic points of developed indicator diagrams
Opis:: The following article describes the effect of combustion chamber leakage of piston engine on the quality of its performance. To make a diagnosis of combustion chamber tightness, only such parameters were selected which are characterized by high information value and are closely connected with its defined structure. For this reason such connections are unmistakable, which results in making the right diagnosis of combustion chamber tightness of piston engines. Special attention was paid to the fact, what consequences, combustion chamber leakage, can cause to the piston engine performance. The most dangerous for the engine efficiency is the leakage of combustion chamber. The leakage of combustion chamber brings about the change of such engine parameters as pressure of suction, pressure of final compression and burning and the change of exhaust gases composition, which effect on the engine power and on fuel consumption. Condition of piston rings and their influence on gas pressure in combustion chamber has also been characterized. Pressure of gases taking place in engine cylinder and their connection with leakage of combustion chamber have also been described. The article also exposes random character of combustion pressure in engine cylinder. Besides, the errors of indicator diagrams together with mapping error position GMP have been mentioned too. Reliability of diagnostic parameters of technical condition of combustion piston engines obtained on the basis of developed indicator diagrams has been defined. Such diagram must be made on the basis of measurements and statistic analysis of pressure parameters in correctly adjusted engines, being in perfect technical condition, and not on the basis of measurements obtained in the engine test bench of a new engine. Bad technical condition, especially leaks in its cylinders causes power differences in engine arrangements, which endangers its safe exploitation.
Źródło:: Journal of KONES; 2013, 20, 3; 339-345
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Diagnostic symptoms of piston combustion engines of ship main propulsion received from its developed indicator diagrams
Autorzy:: Rosłanowski, J.
Charchalis, A.
Powiązania:: https://bibliotekanauki.pl/articles/244511.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: leakage of combustion chamber
errors of developed indicator diagrams
characteristic points of developed indicator diagrams
Opis:: The following article describes parameters of developed indicator diagrams concerning piston combustion engine of ship main propulsion, which can be used to assess its technical condition. To make a diagnosis of the engine combustion only such parameters should be selected which are characterized by high information value, being closely connected with its one defined structure. This is the cause why such connections are of unmistakable character, which allows to make the right diagnosis of technical condition of piston engine. Special attention was also paid to the consequences of diagnostic symptoms qualification from developed indicator diagrams of ship propulsion engine working in different conditions. Deflection of average indicated pressure caused by inappropriate engine performance could be caused by: 1) faulty adjustment of injection pump; 2) leaky combustion chamber, 3) bad technical condition of injection apparatus and the loading air system. Wrong technical condition of the engine caused by a leaky combustion chamber brings about a decrease of its performance. Untight combustion chamber causes the change of such parameters as, suction pressure, pressure of final compression and burning, as well as, the change of exhaust gases composition, which influences the power of the engine and fuel consumption. It has been mentioned what gas pressures of working process in engine cylinders are connected with an untight combustion chamber. Random character of burning pressure course in engine cylinder has also been paid attention to. Reliability of diagnostic parameters of piston engine technical condition received based on developed indicator diagrams have been determined. Diagnostic symptoms have been defined, basing on measurements and statistical analysis of pressure values in the cylinders of properly adjusted engines being in excellent technical condition and not based on measurements received in the engine test bed of a new engine.
Źródło:: Journal of KONES; 2013, 20, 2; 355-362
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Koncepcja zastosowania analizy cyklu życia w ocenie środowiskowej stałych heterogenicznych paliw rakietowych
The concept of the use of life cycle analysis in the environmental assessment of the heterogeneous solid rocket propellants based on the HTPB rubber and the PBAN
Autorzy:: Kukfisz, B.
Maranda, A.
Florczak, B.
Powiązania:: https://bibliotekanauki.pl/articles/136590.pdf
Data publikacji:: 2018
Wydawca:: Szkoła Główna Służby Pożarniczej
Tematy:: paliwa rakietowe
produkty spalania
ekowskaźnik
rocket fuels
combustion products
eco-indicator
Opis:: W artykule przedstawiono wyniki analizy porównawczej sześciu składów stałych heterogenicznych paliw rakietowych, zawierających jako utleniacz tylko chloran(VII) amonu (AP), tylko azotan(V) amonu lub chloran(VII) amonu (AP) i azotan(V) amonu lub chloran(VII) amonu (AP) i azotan(V) sodu (NaNO3) i zawierających jako plastyfikator adypinian dioktylu (DOA) oraz jako lepiszcze syntetyczne kauczuki HTPB lub PBAN. Analizę porównawczą przeprowadzono w oparciu o metodę Ekowskaźnika dla jednej kategorii wpływu zmiany klimatu w ramach kategorii szkody zdrowie ludzkie. Analizowano wpływ gazowych produktów spalania poprzez potencjały globalnego ocieplenia dla warunków stałego ciśnienia w komorze wynoszącego 7 MPa i ciśnienia na wylocie komory równego 0,1 MPa. Wykorzystano wersje hierarchiczną w ramach oceny wielkości wpływu. Analiza wykazała, że dla każdego z analizowanych paliw rakietowych produkty gazowe na wylocie komory mają wyższą wartość, łączną liczbę Ekowskaźnika, czyli wyższy potencjalny wpływ na zmiany klimatu.
The paper presents results of a comparative analysis of six fixed compositions of heterogeneous rocket fuels containing only the ammonium perchlorate (AP), only the ammonium nitrate or the ammonium perchlorate (AP) and the ammonium trioxochlorate or the ammonium perchlorate (AP) and the sodium nitrate (NaN) as the oxidiser, and as plasticizer containing the di-octyl adipate (DOA) and the HTPB or the PBAN rubbers as the synthetic binders. A comparative analysis was carried out based on the Eco-indicator method for a single category of climate change impact under the category of the human life damage. The analysis was carried out of the impact of the gaseous burning products by the global warming potential for the constant pressure conditions in the chamber equalling to 7MPa and pressure on the chamber outlet equalling to 0.1 MPa. Use was made of the hierarchical version under appraisal of the magnitude of the exerted impact. The analysis has shown that for each of the analysed rocket fuels gaseous products on the outfall of the chamber have a higher total value of the number of points of the eco-indicator, i.e. a higher potential impact on the climate changes.
Źródło:: Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej; 2018, 1, 66; 63-76
0239-5223
Pojawia się w:: Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Określenie obciążeń środowiskowych produktami spalania mieszanin pirotechnicznych stosowanych do urabiania złóż blocznych
Determination of environmental burden of combustion products of pyrotechnic mixtures to quarrying operations
Autorzy:: Maranda, A.
Zrobok, R.
Florczak, B.
Kukfisz, B.
Powiązania:: https://bibliotekanauki.pl/articles/92662.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: Rocksplitter
proch czarny
produkty spalania
ekowskaźnik
black powder
combustion products
eco-indicator
Opis:: W ramach niniejszej pracy, stosując program ICT-Thermodynamic Code oszacowano parametry termodynamiczne i składy produktów spalania ładunków typu Rocksplitter zawierających różne masy mieszaniny pirotechnicznej i prochu czarnego. Na podstawie uzyskanych rezultatów falsyfikacji numerycznych, stosując program SimaPro PhD wersji 7.2 holenderskiej firmy PreConsultants, wyznaczono potencjalny wpływ na środowisko metodą Ekowskaźnik 99. Analiza obciążeń środowiska została wykonana dla temperatur spalania testowanych mieszanin oraz temperatury 298 K.
Using the ICT-Thermodynamic Code program, thermodynamic parameters and combustion products composition of the Rocksplitter type, containing different masses of pytotechnic mixture and black powder, were evaluated. The eco-indicator was determined on the basis of numerical falsification results obtained using the SimaPro PhD version 7.2 of the Dutch company PreConsultants. The environmental impact analysis was performed at the combustion temperatures of the tested mixtures and at 298 K.
Źródło:: Materiały Wysokoenergetyczne; 2017, T. 9; 159-168
2083-0165
Pojawia się w:: Materiały Wysokoenergetyczne
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Determination of environmental burden of combustion products of pyrotechnic mixtures to quarrying operations
Określenie obciążeń środowiskowych produktami spalania mieszanin pirotechnicznych stosowanych do urabiania złóż blocznych
Autorzy:: Maranda, Andrzej
Zrobok, Rostyslav
Florczak, Bogdan
Kukfisz, Bożena
Powiązania:: https://bibliotekanauki.pl/articles/1065266.pdf
Data publikacji:: 2019
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: Rocksplitter
black powder
combustion products
eco-indicator
proch czarny
produkty spalania
ekowskaźnik
Opis:: W ramach niniejszej pracy, stosując program ICT-Thermodynamic Code oszacowano parametry termodynamiczne i składy produktów spalania ładunków typu Rocksplitter zawierających różne masy mieszaniny pirotechnicznej i prochu czarnego. Na podstawie uzyskanych rezultatów falsyfikacji numerycznych, stosując program SimaPro PhD wersji 7.2 holenderskiej firmy PreConsultants, wyznaczono potencjalny wpływ na środowisko metodą Ekowskaźnik 99. Analiza obciążeń środowiska została wykonana dla temperatur spalania testowanych mieszanin oraz temperatury 298 K.
Źródło:: Materiały Wysokoenergetyczne; 2019, 11, 1; 66-75
2083-0165
Pojawia się w:: Materiały Wysokoenergetyczne
Dostawca treści:: Biblioteka Nauki

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