降低高空台涡喷发动机进气流场不均匀度装置的试验研究

本文介绍A及B型涡喷发动机在模拟高空试验时的进口总压畸变及测量技术。发动机在低转速工作时发生“放炮现象”,为消除此故障在发动机进口按装一种整流器(由一个收敛段和气动网格组成)使进口气流分布均匀。试验结果效果良好,使稳态不均匀度和动态湍流度明显下降。文中介绍此类整流器的规格及设计细节,具有工程实用价值。

EXPERIMENTAL INVESTIGATION OF A RECTIFIER FOR LOWERING THE DISTORTION OF INLET AIR FLOW OF TURBOJET ENGINE IN A HIGHER ALTITUDE TEST FACILITY

Inlet air flow distortion and surge of engine are of great importance in developing turbojet engine. The distortion of inlet total pressure of A and B type turbojet engine at simulated higher altitude testing and its measure technique are reviewed in this paper. The vehicles break down with the pop / (testing blast) in the test facility, when the engines run at lower speed.In order to eliminate this fault, a unique rectifier which is composed of a set of aerodynamic grld and a converging section is installed and tends to uniform the velocity distribution at the inlet air flow field. The results are effective. The stable un-uniform level D and dynamic turbolence level E are reduced obviously. The details of design and apecification of rectifier are also introduced.