用LDA研究柴油机涡流室内空气运动规律

Investigation of Air Flow in Diesel Swirl Chamber by LDA

利用二维氩离子激光多普勒议（LDA）实测柴油机涡流室内空气运动，揭示柴油机倒拖工况下涡流室内空气运动随曲轴转角的变化规律以及涡流室内流场的空间分布特点。对深入理解和认识柴油机涡流室内空气运动规律及进一步建立涡流室式柴油机燃烧模型具有重要意义。

The air flow in a diesel engine swirl chamber was measured by2D－Ar－ion LDA. The variation of the air flow in the swirl chamber with crankangle and the spacial distribution of the flow field in the chamber under motoredcondition are revealed. The results obtained are contributive to understand theair flow characteristics in swirl chamber and to establish the combustion modelof swirl chamber diesel engines.