多喷口喷流对侧向喷流流场影响的风洞试验研究

侧向喷流控制研究一个很重要的目的在于了解、掌握喷流与来流的干扰，寻找提高喷流控制效率的方法，不同截面多喷流同时工作便是其中一种。多喷流同时作用时，下游喷流会受到上游喷流的影响，与直接来流干扰现象不同，控制效率不同。针对这种情况，φ1m高超声速风洞从测压租测力两方面进行了多喷口喷流对侧向喷流控制影响的风洞试验研究。试验采用锥柱模型，喷管均位于同一母线上，喷管数目为单喷和三喷。结果表明：上游喷流的低压区会影响下游喷流，当喷流数目增加时，喷流与来流的干扰与多个单喷的叠加完全不同。

Experimental investigation on multi-jet interference

One of the important purposes for lateral jet research is to understand and catch the rule of interaction between jet and coming flow, which aims at increasing jet control efficiency. Multi-jet on different cross-section is one way to increase the efficiency. Different from the single jet interaction, jets at the down flow will be influenced by the tail of upstream jets. Experiments including aerodynamic force measurement and pressure measurement were carried out in ~lm hy- personic wind tunnel of CARDC to investigate control efficiency changing with number of jets. A cone cylinder model was used as test model, and test jets were single jet and tri-jet lying on the same generating line. The results indicate that low pressure area of upstream jet will affect the jet interference of downstream jets, and when the number of jet increases, the interference of jets and coming flow is completely different from the superimposition of multiple single jet interfer- ence.