In-cylinder swirl formation process in a four-valve diesel engine |
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Authors: | Wu Zhijun Huang Zhen |
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Institution: | (1) Research Institute of Internal Combustion Engines Shanghai Jiao Tong University, 1954 Huashan Rd. Shanghai 200030, P. R. China e-mail: wzj1972@263.net Tel.: +86–21–64384085, CN |
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Abstract: | An experimental study is presented on the steady flow in a four-valve diesel engine rig by using hot-wire anemometry. Through
the analysis of the in-cylinder three-dimensional flow field of a four-valve diesel engine, the in-cylinder swirl formation
process at various valve lift was investigated. A new criterion is proposed for predicting the emergence of a stable-swirl
formation interface, based on swirl angular momentum flux. A stable-swirl formation interface exists when the main swirl angular
momentum flux is nearly equal to the in-cylinder air total angular momentum flux.
Received: 13 March 2000/Accepted: 7 February 2001 |
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