论文部分内容阅读
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 model test of unblocked cascade thrust reverser based on secondary flow injection control is carried out. In the dual-flow cross / supersonic cascade test platform, the unblocked vane cascade under different conditions of different fan exit pressure ratio, secondary flow pressure ratio, secondary flow injection position and secondary flow angle were studied. Push features and efficiency. From the results of the tests and analysis, it can be concluded that there is a complicated relationship between the outlet pressure ratio of the fan and the secondary pressure ratio and the reverse thrust performance. When the secondary pressure ratio is less than a certain value, as the outlet pressure ratio of the fan increases, Than the increase, and the secondary flow pressure ratio exceeds this value, with the fan outlet pressure ratio increases anti-push flow ratio decreases; and there is the best secondary flow injection position (58.77mm≤Xj≤77.87mm) and injection The angle (θ = 60 °) results in the highest thrust reversal efficiency of the unblocked cascade.