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采用数值和试验方法研究了射流角度对平板横向射流流动结构和工作特性的影响,将得出的规律应用于射流控制矢量喷管上.在小型风洞试验台上进行试验,用纹影方法来观察实验模型的流场结构,通过静压测点来测量实验模型的壁面压力.研究结果表明:数值与试验结果吻合较好;对平板横向射流,增大射流角度能增大射流上游的分离区,弓形激波位置更靠前,角度增加到一定大小,流场结构变化不再明显;对射流控制矢量喷管进行数值模拟得出,增大射流角度能有效提高喷管的推力矢量性能,在NPR为4.6,SPR为0.7条件下,射流角度从90°增加到130°,推力矢量性能提高28.3%.
Numerical and experimental methods are used to study the effect of jet angle on the flow structure and working characteristics of the transverse jet. The law of jet flow is applied to the jet nozzle. In a small wind tunnel test rig, The flow field structure of the experimental model was observed and the wall pressure of the experimental model was measured by static pressure measuring point.The results show that the numerical value agrees well with the experimental results and increasing the jet angle can increase the separation zone upstream of the jet , The position of the bow shock is more forward and the angle is increased to a certain size, and the structure of the flow field is no longer obvious. The numerical simulation of the jet control vector nozzle shows that increasing the jet angle can effectively improve the thrust vector performance of the jet nozzle. When the NPR is 4.6 and the SPR is 0.7, the jet angle increases from 90 ° to 130 °, and the thrust vector performance increases by 28.3%.