中文摘要：

将激励装置Hartmann-Sprenger（H-S）管集成到传统物超声速射流装置中,来激励射流剪切层中的大尺度结构,并利用纹影成像对其进行实验研究.通过对瞬态纹影图和时均纹影图的分析表明有激励射流可以有效增大射流的扩散宽度,并且在2.2kHz以上激励频率的情况下均有明显的激励效果,扩散宽度相对于无激励情况,增大了近70%.

英文摘要：

Hartmann-Sprenger（H-S）tube of exciting equipment was integrated into the traditional supersonic jet device to excite the large-scale structure in shear layer of the jet.The experimental investigation of this structure was performed by using schlieren imaging.It was shown by the analysis of transient and time-averaged schlieren images that the excited jet could enhance the mixing of jet with air increase the width of jet diffusion effectively,and there would be an obvious exciting effect on the jet at 2.2kHz exciting frequency,enhancing the mixing width by almost 70% compared to the unexcited jet.