无阻流板式叶栅反推性能试验研究

Experimental study on performance of blockerless cascade thrust reverser

开展了基于二次流喷射控制的无阻流板式叶栅反推装置的模型试验研究。在双流路跨/超声速叶栅试验平台上,研究了不同风扇出口压比、二次流压比、二次流喷射位置及二次流喷射角度等多工况条件下的无阻流板式叶栅反推特性及效率。从试验和分析结果可以得出:风扇出口压比、二次流压比对反推性能存在复杂的关联关系,二次流压比小于某值时,随着风扇出口压比增加,反推流量比增大,而二次流压比超过此值时,随风扇出口压比的增加反推流量比减小;并且存在最佳的二次流喷射位置(58.77mm≤Xj≤77.87mm)及喷射角度(θ=60°)使得无阻流板式叶栅反推效率最高。

The experimental investigtion of blockerless cascade thrust reverser based on secondary injection was conducted on the dual flow transonic and supersonic cascade test facility. Effect of parameters including fan outlet pressure ratios, secondary pressure ratios, secondary injection positions and secondray injection angles on the performance of blockerless cascade thrust resver were studied. The final results show that fan outlet pressure ratios and secondary pressure ratios has some complex relationship. When secondary pressure ratio less than a certain value, cascase reverse mass flow decreases with the increase of fan outlet pressure ratio, however if secondary pressure ratio esceed the value, it would present a opposite trend. In the whole experimental conditions, there exist a best secondary injection position （58.77mm≤Xj≤77.87mm）（θ=60°）achieving highest thrust reverse.