INTAKE VALVE AND IN-CYLINDER FLOW DEVELOPMENT IN A RECIPROCATING MODEL ENGINE.

被引：0

作者：

Vafidis, C. ^{[1
]}

Whitelaw, J.H. ^{[1
]}

机构：

[1] Imperial Coll of Science &, Technology, London, Engl, Imperial Coll of Science & Technology, London, Engl

来源：

Proceedings of the Institution of Mechanical Engineers. Part C. Mechanical engineering science | 1986年 / 200卷 / C2期

关键词：

ANEMOMETERS - Laser Applications - FLOW OF FLUIDS - Measurements;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Measurements of three velocity components have been obtained by laser Doppler anemometry at the exit plane of the intake valve and inside the cylinder of a model engine motored at 200 r/min with a compression ratio of 7. 7 and both axisymmetric and off-center valves with flat and bowl-in-piston configurations. The results indicate that during early intake the valve flow is influenced by piston geometry and its proximity to the cylinder head. The breakdown of the intake-generated vortices is accompanied by redistribution of the normal stresses which, during compression, tend towards homogeneity. Inside the piston bowl, a vortex is induced during early intake and decays later in the induction stroke to a uniform flow field which is transformed during late compression by the squish effect.

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页码：143 / 152

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