旁通型喷嘴喷射器的环隙结构对性能的影响

Investigation of the Influence of Annular Cavity Structure on the Bypass Ejector Performance

对一种新型带旁通喷嘴的喷射器的性能进行了实验研究,分析了旁通喷嘴结构对喷射器引射特性的影响规律,结果表明:当喷射器处于临界模式下,旁通型喷嘴喷射器的引射性能要优于常规喷射器。环隙空腔间隙和第二喉部直径对引射性能的影响是非线性的。当环隙空腔间隙较小时,引射性能随着第二喉部直径的增大而提高;增大环隙空腔间隙后最优第二喉部直径将会减小。

The entrainment performance of bypass ejector was studied experimentally.The influence of the nozzle structure on ejector flow characteristics was analyzed.The results showed that：The performance of bypass ejector is better than conventional ejectors when the ejector is in critical mode.The impact of annular cavity gap and the second throat diameter on ejector performance is nonlinear.The ejector performance increases as the second throat diameter increases when the annular cavity gap is small;the optimal second throat diameter will decrease as the annular cavity gap increases.