Suchergebnisse
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8. Nov. 2023 · Similar results are seen in the analysis of wall-attached fuel films, where the volume and thickness of the gasoline film are less than those of the E40 film under the given operating conditions. In contrast, E40 consistently exhibits stronger macroscopic spray characteristic values than gasoline under the 0.1–150 and 0.4–150 operating conditions, along with lower film thickness and volume ...
25. Jan. 2023 · Fuel film combustion and its effect on wall heat load in diesel engines are studied. • Fuel film is ignited by acetylene premixed flame, confirming wall-attached burning. • Fuel film flame is flat on the wall and burns quietly but lasts for as long as 100 ms. • Fuel film burning exerts great heat load on the wall, with peak heat flux of ...
15. Feb. 2019 · Although the natural luminance of the fuel film flame shows no significant difference from the conventional impingement spray, it burns quietly and lasts nearly 100 ms, which is much longer The fuel film flame is a near-flat layer on the wall, progressing slowly due to simultaneous burning and evaporation. With the increase of injection pressure and fuel mass, the flame area and natural ...
15. Juli 2022 · The percentage of first injected fuel has little impact on the amount of the remaining fuel film and emissions in the studied range. Increasing engine speed can inhibit the formations of fuel film, HC, CO, and soot emissions, which is due to the improved fuel evaporation, better flow motion, and thermal environment in the cylinder. Double ...
22. Nov. 2017 · Tracer LIF has also been used to investigate liquid fuel films in internal combustion engines . Beside the fuel film on the piston crown [1, 2, 16], the fuel wall wetting on the cylinder liner was visualized with LIF [17, 18]. In addition to the imaging of liquid fuel films, the imaging of oil in optical engines with LIF is also well-known. For ...
15. Juli 2022 · The fuel film appears at −5 ° ATDC and continues to accumulate until it reaches the maximum value at 0.4 ° ATDC (0.4 ° after the end of injection), and then remains constant. The amount of the fuel film drops significantly at 4 ° ATDC because of the main combustion, accompanied by an increase in evaporated fuel. However, the fuel film ...
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