注气缝参数对无阻流门式反推力装置性能的影响

Influences of injection parameters on performance of blockerless thrust reverser

利用CFD数值模拟技术,对涵道比为9的无阻流门式反推力装置实验模型的流场进行数值模拟.分析了不同落压比下,反推力效率、叶栅流量比和注气流量比随注气缝参数变化的规律.根据计算结果,详细分析了反推力装置流场特征,指出二次流注气位置、注气角度和注气缝宽度对反推力装置性能有较大的影响.根据分析结果,确定寻找最佳注气缝参数的一般性规律.

By using CFD technology,the flow field of a blockerless thrust reverser experiment model with the bypass ratio of 9 was simulated.Variations in reverser efficiency,cascade flow ratio,and the injection flow ratio with the injection parameter was described.Based on detailed analysis of the thrust reverser flow characteristics,we found that the location of secondary injection,slot angle,and slot width have great impacts on the performance of thrust reversers.The optimum value of injection parameter can then be obtained.