Temat: Marine - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Influence of the marine 4 - stroke diesel engine malfunctions on the nitric oxides emission
Autorzy:: Lewińska, J.
Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/247875.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: emission
malfunction
piston engine
marine engine
nitric oxides
Opis:: The article presents the results of the laboratory study on nitric oxides (NOx) emission level from marine fourstroke diesel engine. The object of the study was laboratory piston engine, operating at constant speed. Measured engine parameters were necessary to determine the NOx emission in accordance of the requirements of the Annex VI to MARPOL 73/78 Convention. The study consisted of tests during the engine operation without malfunctions and engine operation with simulated malfunctions. Malfunctions of the charge gas exchange in the form of throttling of the air intake duct and the throttling of the exhaust gas duct were taken into account in the simulations. Measurements during the engine operation with simulated malfunctions of the fuel pump on one of the cylinders were also carried out. Mentioned malfunctions were delay of the fuel injection by 5° of the crankshaft angle position and the leakage of the fuel pump of the second engine cylinder. The simulated malfunctions decrease the total weighted NOx emission in all considered the engine loads. All simulated malfunctions resulted in an increase of the NOx emissions during engine operation at low the engine loads and a decrease of the mentioned emission at maximum the engine loads operation. The calculations of the weighted specific fuel consumption present a little change in engine efficiency which are within the range of measuring error of the used method.
Źródło:: Journal of KONES; 2013, 20, 1; 171-177
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Thermal state simulation for cylinder of marine two stroke engine
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/244344.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine two-stroke engines
modelling
radiosity
heat transfer
Opis:: This paper deals with the modelling of heat flow through cylinder liner structural components of a two-stroke engine. Especially, I paid attention to simulating temperature distribution for the wet cylinder liner. Multidimensional equations for the transient heat conduction with the Dirichlet and Fourier boundary conditions have been applied. In particularly, local values for the convective and radiative heat transfer coefficients using the Fourier boundary conditions determined in space of cylinder volume are applied. In order to determine the temperature distribution for the considered space, the radiosity method is used. Simulation results have been presented in the form of a temperature field for cylinder liner structural components depending on the crankshaft position angle. Application of the iterative calculation method for solving differential equations of energy balance allowed me to use software easy to get. I carried out all iterative computations using MSEXCEL spreadsheet. This way, I could decrease the simulation cost significantly. The simplicity of such an approach allowed me to apply the obtained results for visualization of the conduction heat transfer phenomena occurring in a cylinder of working marine engine. The presented approach could be used for the development of ship machinery simulators as well.
Źródło:: Journal of KONES; 2007, 14, 4; 209-216
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The analysis of influence of fuel spray angle on NOx fraction in the exhaust gas from marine 4-stroke diesel engine
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/246120.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
NOx fraction
spray angle
CFD model
Opis:: The manuscript presents the analysis of influence of fuel spray angle on NOx fraction in the exhaust gas emitted from marine 4-stroke diesel engine. Analysis is based on computational fluid dynamic (CFD) model designed because of the motion mesh of combustion chamber of the marine engine cylinder and air inlet and exhaust gas ducts. Presented model consists of models of fuel injection into combustion chamber, breaking-up and evaporation of the fuel, mixing with air and turbulent combustion with heat transfer to construction elements of the engine cylinder. Mentioned CFD model is validated according to boundary and initial conditions taken from direct measurements. The chosen research object is laboratory 4-stroke turbocharged Diesel engine with direct injection of the fuel and mechanically controlled of both cylinder valves and the injector. The conclusion from the analysis is that the increase of fuel spray angle causes the increase of maximum speed of kinetic phase of the combustion and the decrease of maximum speed of diffusion phase of the combustion. The effect of this is the increase of maximum combustion pressure and the decrease of maximum combustion temperature. The result of presented changes in combustion process is the increase of NOx fraction in the exhaust gas. It should be noted that extended increase of the fuel spray angle cause close-up the fuel spray to the cylinder heads wall and the decrease of NOx fraction in the exhaust gas.
Źródło:: Journal of KONES; 2015, 22, 3; 309-316
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The theoretical study on influence of fuel injection pressure on combustion parameters of the marine 4-stroke engine
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/243749.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine engine
multidimensional model
combustion model
fuel injection pressure
CFD
Opis:: The manuscript presents the analysis of influence of fuel injection pressure on the combustion parameters of marine 4-stroke diesel engine. Analysis is based on computational fluid dynamic (CFD) model designed on the basis of the motion mesh of combustion chamber of the marine engine cylinder and air inlet and exhaust gas ducts. Presented model consists of models of fuel injection into combustion chamber, breaking-up and evaporation of the fuel, mixing with air and turbulent combustion with heat transfer to construction elements of the engine cylinder. Mentioned CFD model is validated according to boundary and initial conditions taken from direct measurements. The chosen research object is laboratory 4-stroke turbocharged Diesel engine with direct injection of the fuel and mechanically controlled of both cylinder valves and the injector. During the calculation the fuel dose, delivered into the engine cylinder was changed without any other changes in the initial and boundary conditions. This approach to the problem allows to the cause-effect analysis. The results of presented study are as follows: The increase of the fuel injection pressure causes the increase of fuel dose, delivered into the engine cylinder and the increase of intensity of both kinetic and diffusion stage of the combustion process. The result of this is the increase of pressure and temperature of the combustion and significant increase of the NOx fraction despite the decrease of the O2 content in the combustion chamber of the engine.
Źródło:: Journal of KONES; 2016, 23, 1; 161-168
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Experimental research on influence of the fuel nozzle geometry on the fuel consumption of the marine 4-stroke diesel engine
Autorzy:: Kowalski, J.
Nagórski, J.
Sikora, G.
Powiązania:: https://bibliotekanauki.pl/articles/245963.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine engine
fuel consumption
fuel injection
experimental measurements
compression ignition engine
Opis:: The article presents experimental research that has been carried out on a marine, 4-stroke, 3-cylinder, turbocharged engine. During testing, the engine operated at a constant rotational speed of 750 rpm and a load from 0 kW to 280 kW. The engine was fuelled by diesel oil of known specification and loaded by electric generator with water resistance. The fuel consumption was measured during the engine operation with fuel nozzles with different geometries. The measurement of the fuel consumption was carried out using a weighing system that was designed, constructed, and manufactured by the “KAIZEN” scientific research team at the Faculty of Mechanical Engineering at the Gdynia Maritime University. The results of measurements show changes in the fuel consumption by the engine with the geometry of the injected fuel spray. The research facility is Sulzer’s 3- cylinder, 4-stroke, turbocharged AL25/30 piston engine. The fuel system consists of Bosch injection pumps controlled by a rotation speed regulator. Fuel injectors are centrally located in the cylinder heads of the engine.
Źródło:: Journal of KONES; 2018, 25, 2; 185-190
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The model of the air inlet duct flow of the marine 4-stroke diesel engine
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/243843.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
Venturi orifice
air flow
CFD model
air duct throttling
Opis:: The manuscript presents the model of the air flow through the air inlet duct of the marine 4-stroke engine. Presented model are computational fluid dynamic modelbased on dimensions and the construction of the real air intake duct. The measurement parameters from real object are used to the model validation. Mentioned measurements of the air flow are conducted by Venturi orifice for different loads of the engine and the different flow characteristics of the air intake duct. The results from computational fluid dynamic model are useful to calibration the orifice by setting the orifice module. The orifice module changes up to 6% of the mean values for all considered loads of the engine and throttling’s of the air intake duct. The approximation the flow characteristic for other throttling’s of the air intake duct was conducted also. The obtained approximation is useful tool to calculate the air flow to the engine for the different throttling’s than measured. Linear dependence between the air mass flow and the power of the engine at the constant engine speed was observed. The throttling of the cross section area of the air intake duct causes changing the characteristic in accordance to a second order polynomial. The maximum error of obtained approximation compared to measured values not excided 4% and mean error for all measured loads and throttling’s not exceeded 0.12%.
Źródło:: Journal of KONES; 2013, 20, 2; 193-200
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The emission and combustion characteristics of marine diesel engine with extreme throttled of air or exhaust ducts
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/27315962.pdf
Data publikacji:: 2018
Wydawca:: STE GROUP
Tematy:: silnik morski
dławienie
emisja
spalanie
usterka
marine engine
throttling
emission
combustion
malfunction
Opis:: Presented paper shows the results of the laboratory tests on the relationship between the extreme throttling of both air intake duct and exhaust gas duct and gaseous emission from the marine engine. The object of research is a laboratory, 4-stroke, DI diesel engine, operated at loads from 50 kW to 250 kW at a constant speed equal to 750 rpm. During the laboratory tests the thermodynamic and exhaust gas emission characteristics of the engine were measured with technical condition recognized as "working properly" and with simulated throttling of both air intake duct and exhaust gas duct. Air intake duct throttling by 60% causes visible changes at both gas temperature and pressure behind the intercooler. The study results show significant changes of NOx and CO2 emission for considered air intake duct throttling. The best indicator of exhaust gas duct throttling among considered thermodynamic parameters of the engine is mean in-cylinder pressure. In the case of measuring the composition of exhaust gas, the throttling of the exhaust gas duct causes visible changes in CO2 and NOx emission. The conclusion is that the results of measurements of the composition of the exhaust gas may contain valuable diagnostic information about the technical condition of air intake and exhaust gas duct of the marine engine.
Źródło:: New Trends in Production Engineering; 2018, 1, 1; 427-433
2545-2843
Pojawia się w:: New Trends in Production Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Laboratory study on influence of air duct throttling on exhaust gas composition in marine four - stroke diesel engine
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/248050.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine diesel engine
exhaust gas composition
toxic emission
laboratory investigation
air duct throttling
Opis:: Presented paper shows results of laboratory tests on the relationship between the throttling of a cross area of an air intake duct and the composition of exhaust gas from the marine engine. The object of research is a laboratory four-stroke diesel engine, worked with a load from 50kW to 250kW at a constant speed. During the laboratory, tests over 50 parameters were measured of the engine with technical condition recognized as a “working properly” and with a simulated the air intake duct throttling. The simulation consisted of inserting the throttling flanges to the air intake duct before compressor, limiting duct cross-sectional area by 20% and 60% respectively. The results of laboratory research confirm that the effect of the air intake duct throttling on the engine thermodynamic parameters is clearly visible only at considerable throttling. In the case of measuring the composition of exhaust gas, both mole fractions and emissions of gaseous components markedly affected even at low throttling. For example, 20% throttling of the cross section of the air intake duct increase the mole fraction of carbon monoxide in exhaust gas almost 44% during working the engine with load equal to 250kW, and only 10% of the temperature after air cooler. Keep in mind that the temperature after air cooler was an engine parameter, which undergoes the greatest change during the simulation of that malfunction. The conclusion is that the results of measurements of the composition of exhaust gas may contain valuable diagnostic information about the technical condition of the air delivery to the engine system.
Źródło:: Journal of KONES; 2012, 19, 1; 191-198
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: An experimental study of emission and combustion characteristics of marine diesel engine with fuel injector malfunctions
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/260092.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: marine diesel engine
exhaust gas composition
toxic emission
laboratory investigation
fuel injector malfunctions
Opis:: The presented paper shows the results of the laboratory study on the relation between chosen malfunctions of a fuel injector and composition of exhaust gas from the marine engine. The object of research is a marine 3-cylinder, four-stroke, direct injection diesel engine with an intercooler system. The engine was loaded with a generator and supercharged. The generator was electrically connected to the water resistance. The engine operated with a load between 50 kW and 250 kW at a constant speed. The engine load and speed, parameters of the turbocharger, systems of cooling, fuelling, lubricating and air exchange, were measured. Fuel injection and combustion pressures in all cylinders of the engine were also recorded. Exhaust gas composition was recorded by using a electrochemical gas analyzer. Air pressure, temperature and humidity were also recorded. Emission characteristics of the engine were calculated according to ISO 8178 standard regulations. During the study the engine operated at the technical condition recognized as „working properly” and with simulated fuel injector malfunctions. Simulation of malfunctions consisted in the increasing and decreasing of fuel injector static opening pressure, decalibration of fuel injector holes and clogging 2 neighboring of 9 fuel injector holes on one of 3 engine cylinders.
Źródło:: Polish Maritime Research; 2016, 1; 77-84
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: An experimental study of emission and combustion characteristics of marine diesel engine in case of cylinder Valves leakage
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/259195.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: marine diesel engine
exhaust gas composition
emission
exhaust gas valve leakage
inlet valve leakage
Opis:: Presented paper shows the results of the laboratory tests on the relationship between throttling of both air intake duct and exhaust gas duct and a gaseous emission from the marine engine. The object of research is a laboratory, four-stroke, DI diesel engine, operated at loads from 50 kW to 250 kW at a constant speed equal to 750 rpm. During the laboratory tests over 50 parameters of the engine were measured with its technical condition recognized as a „working properly” and with simulated leakage of both air intake valve and exhaust gas valve on the second cylinder. The results of this laboratory research confirm that the leakage of cylinder valves causes no significant changes of the thermodynamic parameters of the engine. Simulated leakages through the inlet and exhaust valve caused a significant increase in fuel consumption of the engine. Valve leakages cause an increase of the exhaust gas temperature behind the cylinder with leakage and behind other cylinders. The exhaust gas temperature increase is relatively small and clearly visible only at low loads of the engine. The increase of the temperature and pressure of the charging air behind the intercooler were observed too. Charging air temperature is significantly higher during the engine operation with inlet valve leakage. The study results show significant increases of the CO, NOx and CO2 emission for all the mentioned malfunctions. The conclusion is that the results of measurements of the composition of the exhaust gas may contain valuable diagnostic information about the technical condition of the air intake duct and the exhaust gas duct of the marine engine.
Źródło:: Polish Maritime Research; 2015, 3; 90-98
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: ANN based evaluation of the NOx concentration in the exhaust gas of a marine two-stroke diesel engine
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/258708.pdf
Data publikacji:: 2009
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: artificial neural network
marine two-stroke engine
NOx concentration
Annex VI to Marpol Convention
Opis:: The article presents results of a study on the possible application of artificial neural networks (ANNs) to the evaluation of NOx concentration in the exhaust gas of a marine two-stroke Diesel engine. A concept is presented how to use the ANN as an alternative to direct measurements carried out on a ship at sea. Methods of proper ANN selection, configuration and training are presented. Also included are the results of laboratory tests, performed to obtain data for ANN training and tests, and the results obtained from modelling certain processes with the aid of selected ANNs. As a result of the performed investigations, an ANN was constructed and trained to calculate NOx concentration in the Diesel engine exhaust gas based on the engine operation parameters measured with an average error of 1.83% , and the fuel consumption measured with an average error of 1.12%.
Źródło:: Polish Maritime Research; 2009, 2; 60-66
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: An artifical neural network usage in measurement of exhaust gas emission from marine engines: case study
Autorzy:: Kowalski, J.
Rudzki, K.
Powiązania:: https://bibliotekanauki.pl/articles/2073611.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: marine engine
emission
neural network
measurement
power approximation
silnik okrętowy
emisja
sieć neuronowa
pomiar
Opis:: The paper presents the case study of use the artificial neural network to predict the main propulsion marine engine load. Mentioned load of the engine is important parameter to assess the emission level of toxic compounds into the atmosphere according to ISO standard and MARPOL convention. The engine load depends on the ship speed, rotational speed of the engine, propeller blades settings, the direction and the speed of wind, the condition of sea and the direction and the speed of sea currents and construction parameters of the ship. The realization of the aim of the work requires the direct measurement of presented parameters and measurement of exhaust gas composition. The experiment was carried out onboard STS “Pogoria”. Obtained results are enough to use the ANN to predict engine load to measure the emission level of toxic compounds.
Źródło:: Journal of Polish CIMEEAC; 2016, 11, 1; 87--93
1231-3998
Pojawia się w:: Journal of Polish CIMEEAC
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: The detection of selected marine engine malfunctions on the basis of the exhaust gas composition
Wykrywanie wybranych niesprawności silnika okrętowego w oparciu o skład emitowanych spalin
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/327520.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:: marine engine
malfunctions detection
exhaust gas composition
data classification
silnik okrętowy
wykrywanie niesprawności
skład spalin
klasyfikacja danych
Opis:: Marine diesel engines are generators of mechanical energy, but also are generators of toxic compounds into the atmosphere. The composition of the exhaust gas may be a carrier of diagnostic information about the condition of functional systems of the engine. Results of the classification and selection of diagnostic signals for selected marine engine malfunctions are presented. The analysis was based on results of laboratory tests. Mentioned classification was able to isolate symptoms of malfunctions of marine 4-stroke diesel engine in the composition of the exhaust gas. Complementary detection signals are exhaust gas temperature behind each cylinder. The conclusion of this work is the ability to detect by this method such engine malfunctions as the throttling the air intake duct, the throttling of the exhaust gas duct, the decreasing and the increasing of fuel injection pressure on the selected cylinder, chocked or discalibrated fuel injector, the leakage of the fuel pump, changing of the fuel injection timing and exhaust and inlet valves malfunctions.
Silniki tłokowe generatorami energii mechanicznej, ale również generatorami emisji związków toksycznych do atmosfery. Skład emitowanych spalin może być nośnikiem informacji diagnostycznej o stanie technicznym układów funkcjonalnych silnika. W pracy przedstawiono wyniki klasyfikacji i wyboru sygnałów diagnostycznych dla wybranych niesprawności silnika okrętowego. Analiza została oparta na wynikach badań laboratoryjnych. W wyniku przeprowadzonych działań udało się wyodrębnić symptomy niesprawności 4-suwowego silnika okrętowego w składzie emitowanych spalin. Sygnałami uzupełniającymi detekcję są temperatury gazów spalinowych za poszczególnymi cylindrami. Wnioskiem z prezentowanej pracy jest możliwość wykrycia tą metodą takich niesprawności silnika jak dławienie kanału dolotowego powietrza i wylotowego spalin, obniżenie i zwiększenie ciśnienia wtrysku paliwa do wybranego cylindra, zakoksowanie lub rozkalibrowanie wtryskiwacza, przecieki w pompie paliwowej, zmiana rozpoczęcia wtrysku paliwa oraz wypalenie gniazd zaworów dolotowych i wylotowych.
Źródło:: Diagnostyka; 2014, 15, 3; 39-44
1641-6414
2449-5220
Pojawia się w:: Diagnostyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: The influence of the fuel spray nozzle geometry on the exhaust gas composition from the marine 4-stroke diesel engine
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/133373.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: marine Diesel engine
fuel injector geometry
combustion process
exhaust gas composition
emission
silnik okrętowy
proces spalania
skład spalin
emisja
Opis:: The paper presents experimental research on a 4-stroke, 3-cylinder, turbocharged AL25/30 Diesel engine. Research consisted in investigating the effect of the geometry of the fuel injectors on the exhaust gas composition from the engine. During measurements, the engine was operated with a regulator characteristic of a load range from 40 kW to 280 kW, made by electric water resistance. The engine was mechanically coupled to the electric power generator. Three observations were made for each engine load, operating with fuel injectors of varying geometry. All considered types of injectors were installed on all engine cylinders. Mentioned injectors differed in the size of the nozzle holes diameters, holes numbers and angles measured between the holes axis. Engine performance data were recorded with a sampling time of 1 s. Cylinder pressure and fuel injection pressure on the front of each injector were collected also. The composition of the exhaust gas was measured using an electrochemical analyzer. According to the results, the change of fuel nozzle geometry results in a change in fuel spraying and evaporation and consequently changes in the course of the combustion process. The effect of this is the change of the composition of the exhaust gas.
Źródło:: Combustion Engines; 2018, 57, 1; 59-63
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Influence of fuel injector holes diameter on parameters of combustion process in the cylinder of the marine 4-stroke Diesel engine
Autorzy:: Kowalski, J.
Powiązania:: https://bibliotekanauki.pl/articles/2073635.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: marine engine
multidimensional model
combustion model
fuel injection
holes diameter
silnik okrętowy
model wielowymiarowy
model spalania
wtrysk
średnica otworu
Opis:: The paper presents an analysis of the influence of the fuel injector nozzle holes diameter on parameters of the brake-up, evaporation and combustion process in the cylinder of the marine 4-stroke Diesel engine. Presented analysis was prepared in the basis on computational fluid dynamic model. Initial and boundary conditions of the model as well as data used to model validation were collected during the laboratory study. Calculations were conducted for nominal fuel holes diameter equals 0.375mm and diameters increased and decreased by 50μm and 100μm respectively. According to presented results the increase of the diameter of fuel nozzle holes causes the increase of fuel Sauter’s mean diameter in the initial stage of the injection process and the decrease of fuel process evaporation. The result of this phenomenon is the slowdown of the initial stage of the combustion process and the decrease of both pressure and temperature of combustion.
Źródło:: Journal of Polish CIMEEAC; 2016, 11, 1; 95--102
1231-3998
Pojawia się w:: Journal of Polish CIMEEAC
Dostawca treści:: Biblioteka Nauki

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