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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. 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 ...
Y-P. Wang (&), G. B. Wilkinson, J. A. Drallmeier Department of Mechanical and Aerospace Engineering and Engineering Mechanics, University of Missouri-Rolla, Rolla, MO 65409-0050, USA. E-mail: Yupingw@umr.edu. presence of liquid films in the intake port and on the back of the valve surface. These films are seen to atomize through interaction ...
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 ...
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. 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 ...
In the TiKaBe project (ink development for fuel cell catalyst coating), Fraunhofer ISE is developing and validating catalyst inks for highly scalable, industrial coating processes. The project is part of the HyFab project network, which is intended to create a knowledge base for the automotive and supplier industry to facilitate research into ...
