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MoTeC - Tuning: Fuel Film
11. Okt. 2001 · 1. Introduction. The fuel/air mixing processes in spark ignition (SI) engines are important to maximise efficiency and reduce emissions. During preparation for combustion, the fuel flow exists in several streams, these being vapour, liquid droplets and liquid wall film. As the fuel moves towards the cylinders, a continuous exchange of mass ...
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 ...
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. Dez. 2022 · Because suspended droplets above deposited fuel film would distribute the LIF signal, the transient states of deposited fuel film were difficult to capture [31]. In the measurement process, the high-speed camera records the deposited film image with a 5 ms delay after the end of injection to ensure the reliability of fluorescence signal. In the PDA experiment, only the main impingement regions ...
24. Juni 2004 · 6 Summary and conclusions. Fuel film breakup phenomena from a valve and port surface were studied in detail using an axisymmetric steady flow apparatus. With this apparatus, the effects of the valve and port geometry could be isolated, without the interference of many other variables existing in an actual engine.
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 ...
