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    Wyświetlanie 1-5 z 5
    Tytuł:
    Diesel engine for aircraft propulsion system
    Autorzy:
    Gęca, M.
    Czyż, Z.
    Sułek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/134252.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    aircraft propulsion system
    power-to-weight ratio
    specific fuel consumption
    silnik spalinowy
    lotniczy układ napędowy
    jednostkowe zużycie paliwa
    Opis:
    Stricter requirements for power in engines and difficulties in fueling gasoline engines at the airport make aircraft engine manufacturers design new engines capable of combusting fuel derived from JET-A1. New materials used in compression-ignition engines enable weight reduction, whereas the technologies of a Common Rail system, supercharging and 2-stroke working cycle enable us to increase the power generated by an engine of a given displacement. The paper discusses the parameters of about 40 types of aircraft compression ignition engines. The parameters of these engines are compared to the spark-ignition Rotax 912 and the turboprop. The paper also shows trends in developing aircraft compression-ignition engines.
    Źródło:
    Combustion Engines; 2017, 56, 2; 7-13
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental research of oil pump for a compression-ignition aircraft engine
    Autorzy:
    Szlachetka, Marcin
    Sochaczewski, Rafał
    Gęca, Michał Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/133729.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    opposed-piston engine
    aircraft propulsion system
    oil system
    oil pump
    silnik wysokoprężny
    silnik o tłokach przeciwbieżnych
    układ napędowy samolotu
    układ olejowy
    pompa oleju
    Opis:
    The paper presents an analysis of the constructions of oil pumps for an aircraft compression ignition engine. It is a two-stroke liquid-cooled engine with a power of 100 kW. The system has 3 cylinders and 6 opposed pistons. The paper estimates the required oil pump capacity to make the engine components well-lubricated. Next, automotive oil pumps for diesel engines are analyzed to select a correct pump for aircraft diesel engine applications. Three pump constructions of different constructions and dimensions of a rotor were select-ed. A measurement bench was designed and built to test these oil pumps in the range of pump shaft speeds from 0 to 4500 rpm and volumetric flow rate up to 150 l/min. The bench also enables stabilization of oil temperature at the required level within the range from 30 to 120oC. In addition, flow resistance through engine slide bearings was simulated by changing the position of a throttling valve at the pump output to regulate pressure in the range of 0-700 kPa. The obtained capacity characteristics of individual pumps versus on oil pressure and temperature allowed us to find an appropriate oil pump to make individual engine nodes well-lubricated.
    Źródło:
    Combustion Engines; 2019, 58, 4; 142-146
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Coolant pump for compression-ignition aircraft engine
    Autorzy:
    Gęca, Michał Jan
    Pietrykowski, Konrad
    Barański, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/133232.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    diesel engine
    opposed-piston engine
    aircraft propulsion system
    cooling system
    water pump
    silnik wysokoprężny
    silnik o tłokach przeciwbieżnych
    układ napędowy samolotu
    układ chłodzenia
    pompa wody
    Opis:
    The article presents an analysis of the design of cooling liquid pumps for a compression-ignition aircraft engine. A 100 kW twin-charged, two-stroke, liquid-cooled engine has 3 cylinders and 6 opposed-pistons. In the first part of the study, the amount of heat needed to be removed by the cooling system was estimated to obtain the required volumetric flow rate. Then, the design of automotive cooling liquid pumps for compression-ignition engines with a Common Rail power supply system and power of about 100 kW was analyzed. The aim of the analysis was to select a suitable pump for applications in the aircraft compression-ignition engine. 5 constructions of different shape, diameter and width of the working rotor were selected. The pressure and volume flow rate were determined for a given rotational speed of the pump on a specially built stand. The operation maps of individual pumps were created to select the most efficient types of pumps.
    Źródło:
    Combustion Engines; 2019, 58, 4; 52-57
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of fuzzy expert system for an automatic control of the propulsion system in the aircraft ZLIN 143LSi
    Autorzy:
    Krok, B.
    Grzesik, N.
    Kuźma, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/242523.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    fuzzy logic
    fuzzy expert system
    propulsion system
    aircraft Zlin 143LSi
    Opis:
    The article discusses the manner of controlling the propulsion system in the aircraft Zlin 143LSi, which is equipped with a piston engine driving a variable-pitch propeller. All the operating procedures are carried out manually by the pilot in accordance with the flight manual. The authors attempted at developing the project of a controller based on fuzzy logic, whose main goal was automating the control system of the propulsion unit, thus lowering the level of difficulty of pilotage, and increasing the economics of the operation. The project was made in an interactive environment FuzzyLogic Toolbox of the MATLAB programme. In the analysis, three input parameters were taken into account, exerting an impact on changing the rotational speed of the propeller: the charging pressure of the propulsion unit expressed in inches of mercury, the speed of the aircraft (TAS) in knots and the angle of attack, at which the flight is made, expressed in degrees. On the basis of the above-mentioned input signals, the rotation speed of the propeller was determined, by changing the blade pitch and the recommended angle of attack for the parameters in order to make an optimal use of the data of the flight conditions. The article presents the project of the controller and its optimization. The authors simulated the controller operation in the package MATLAB “Simulink”. The article ends with data analysis and final conclusions.
    Źródło:
    Journal of KONES; 2018, 25, 3; 307-314
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of thermal interactions between elements of propulsion system and selected parts of the airplane skin in small aircrafts
    Autorzy:
    Łapka, P.
    Seredyński, M.
    Furmański, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/240885.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    computational fluid dynamics
    numerical heat transfer
    propulsion system
    small aircraft
    thermal interactions
    CFD
    numeryczna mechanika płynów
    numeryczna wymiana ciepła
    układ napędowy
    samolot lekki
    interakcje termiczne
    Opis:
    Development of new or upgrading of existing airplanes requires many different analyses, e.g., thermal, aerodynamical, structural, and safety. Similar studies were performed during re-design of two small aircrafts, which were equipped with new turboprop engines. In this paper thermo-fluid analyses of interactions of new propulsion systems with selected elements of airplane skin were carried out. Commercial software based numerical models were developed. Analyses of heat and fluid flow in the engine bay and nacelle of a single-engine airplane with a power unit in the front part of the fuselage were performed in the first stage. Subsequently, numerical simulations of thermal interactions between the hot exhaust gases, which leave the exhaust system close to the front landing gear, and the bottom part of the fuselage were investigated. Similar studies were carried out for the twin-engine airplane with power units mounted on the wings. In this case thermal interactions between the hot exhaust gases, which were flowing out below the wings, and the wing covers and flaps were studied. Simulations were carried out for different airplane configurations and operating conditions. The aim of these studies was to check if for the assumed airplane skin materials and the initially proposed airplane geometries, the cover destruction due to high temperature is likely. The results of the simulations were used to recommend some modifications of constructions of the considered airplanes.
    Źródło:
    Archives of Thermodynamics; 2018, 39, 3; 45-61
    1231-0956
    2083-6023
    Pojawia się w:
    Archives of Thermodynamics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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