摘要
本文介绍以一压力观察室研究壁面碰撞对柴油油束特性的影响,采用纹影摄影法及光导纤维技术确定油束的扩展过程、着火延迟及着火位置,并在柴油机工作条件下分析了壁面温度、壁面与油束相对位置及空气温度的影响。统计结果表明,在较高壁面温度时油束可以在壁表面首先着火;减小油束碰撞角度,增大壁面与油嘴的距离或提高空气温度可降低壁面对油束着火特性的影响。
To investigate the influence of the diesel fuel sprays impinging on a wall upon their behavior, a high-pressure observation chamber was designed, and the employment of Schlieren photography and optical fibre technique enables to determine the spray development, ignition delay and ignition position. Under diesel engine working conditions, an analysis was made of the influence of the wall temperature, position of wall to spray and air temperature. Statistics show that ignition first starts on the wall surface at a high enough wall temperature, while reducing the angle between the spray axis and the wall, stepping up the distance between the wail and the injector or heightening the air temperature lessens the wall's influence on ignition behavior.
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
1991年第4期287-293,共7页
Transactions of Csice
基金
联邦德国科研协会(Deutsche Forschungsgesellschaft)资助
关键词
柴油机
柴油
油束
着火
壁面
碰撞
Diesel fuel spray
Schlieren photography
Ignition delay
