基于激光测试技术的喷雾场试验研究

Experimental Study on Spray Field Based on Laser Measurement Technology

在航空发动机燃烧室中,燃油是在经过喷嘴雾化之后,以液雾的形式进入的,因此,液雾的特性也决定了燃烧的质量,而液雾的特性是由喷嘴的雾化性能来决定的。通过运用PIV(particle image velocimetry)和GSV(global sizing velocimetry)这两种激光测试技术,对喷嘴喷雾场进行了试验研究。试验结果表明:在一定压力范围内,喷雾锥角随压力的变大而变大;在较大压力下,喷雾场会形成空心锥体结构;在一个压力确定的喷雾场中,边缘区域的雾化效果最好。通过对试验数据的分析处理,可以检测喷嘴的雾化性能。

The fuel is injected into the aircraft engine combustion chamber in the form of liquid mist,after atomization through the nozzle.Therefore,the quality of the liquid mist determines the quality of the combustion,and the quality of liquid mist is determined by the atomization performance of the nozzle.Two kinds of laser measurement technology,PIV and GSV,were used to study the spray field.Experimental results show： in a certain pressure range,the spray cone angle increases with the pressure.The hollow cone structure will be formed in the spray field at high pressure.In a fixed pressure spray field,the best atomization effect is the edge area.Through the analysis of test data,the atomization performance of the nozzle can be measured.