Interactions of jets with walls
The objective of this project was the development of special measurement techniques and devices for the study of combustion chamber wall effects on the air/fuel mixing process of a direct injection diesel engine. Physical phenomena, such as atomisation and evaporation, are very important controls of combustion and auto-ignition in diesel engines. These physical processes must be understood if future diesel engines are to be designed which are fuel efficient and pollutant free. In particular, the formation of wall films in piston bowls is important, as it affects the evaporation and re-atomisation of fuel droplets. Evidence has been found linking the formation of wall films with increased soot emission. It is, therefore, necessary to study the mechanism by which these films are deposited and to quantify their thickness as a function of time. This report discusses methods for visualising the initial atomisation and wall impingement of a diesel spray, as well as describing the development and implementation of a film thickness measurement technique. A method for using this technique in high pressure/high temperature equipment is also detailed.
Bibliographic Reference: EUR 13534 EN (1991) 123 pp., FS, ECU 11.25
ISBN: ISBN 92-826-3115-X
Record Number: 199111475 / Last updated on: 1994-12-02
Original language: en
Available languages: en