欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
开展了不同锥度喷孔的可视化试验,拍摄了不同压力下空穴和喷雾的发展情况。在圆柱和渐扩喷孔内发现了空穴,在渐缩孔内则没有,前两者的喷雾破碎效果优于后者。但是,在相同喷射条件下,渐缩孔的流量系数要高于圆柱和渐扩孔。分析表明空穴流动所带来的液流扰动,对喷雾破碎具有决定性的影响。对于放大喷嘴中出现的水力柱塞流现象进行了分析,推测其产生的原因是边界层分离后回流区的再附着点达到了喷孔出口。
英文摘要：
In this paper the visualization experimental study of nozzles with different hole conicity were carried out.It was found that cavitation phenomenon will occur in cylindrical and divergent hole nozzles but not in a convergent hole nozzle.However,under the same injection conditions,the discharge coefficient of convergent hole nozzle is large than that of the other nozzles.Detailed analysis show that the collapse of cavitation bubbles contributes to the disintegration of the spray mainly through causing a local breakup.For the hydraulic flip phenomenon happened in the scaled-up nozzles,it can be explained as the cavitation bubbles filed in the separated boundary layer reaches the end of the nozzle hole.
同期刊论文项目
同项目期刊论文
EFFECT OF NOZZLE HOLE SIZE COUPLING WITHEXHAUST GAS RE-CIRCULATION ON THE ENGINE EMISSIONPERFORMANCE
Visualization experiment on cavitating flow of different length-diameter ratios using diesel and bio
Experimental study of flow regime characteristics in diesel multi-hole nozzles with different struct
Effect of nozzle geometrical and dynamic factors on cavitating and turbulent flow in a diesel multi-
A numerical study of the effects of injection rate shape on combustion and emission of diesel engine
Numerical study of effect of injection parameters on combustion and emission performance of a direct
STUDY ON EFFECT OF FUEL INJECTION STRATEGY ON COMBUSTION NOISE AND EXHAUST EMISSION OF DIESEL ENGINE
Experimental study of cavitating flow inside vertical multi-hole nozzles with different length-diame
Experimental study of cavitating flow inside enlarged transparent injector nozzles and its effect on
An experimental investigation of cavitating flow in diesel injector nozzle under different back pres
期刊信息
位置：