压力对离心式喷注器雾化特性影响的试验研究

针对不同入口压力对喷注器雾化特性的影响的问题，对某一双组元姿控推力器的离心式喷注器进行大气环境下不同入口压力的雾化试验.高速摄影试验对喷注器雾化形成过程进行了拍照与分析，PDA试验对喷注器稳态工作时的雾化特性进行了测量与分析，并对试验结果进行了拟合计算.试验结果表明该喷注器有良好的雾化性能，入口压力的增加使得喷雾场可以更加快速的形成和稳定，雾化锥角变大，雾化质量更好，但是变化趋势随压力增大而减缓；计算得到的关系式可预测该喷注器不同工况下液滴的索太尔平均直径，对喷注器优化设计有一定的指导意义.

Experimental Investigations on Atomization Characteristics of Bi-Centrifugal Pressure Swirl Injector

To investigate the relationship between the inject pressure and the spray atomization characteristics, a series tests are taken on a bi centrifugal swirl injector, which works in different injection pressures. The generation and evolution process of the spray are experimentally studied by high speed photography trials. And the PDA (Phase Doppler Anemometry) tests focus on the stable spray characteristics. On the basis of the experimental results, an equation is developed via nonlinear fitting calculation. The test results show that the injector has good atomization characteristics. Increasing injection pressure makes the spray form more quickly and the spray cone angle becomes larger. The equation can use for predicting the D32 of this bi centrifugal swirl injector in different situations, which could provide data for designer.