机翼水平失速诱发发动机失速的飞行试验

Flight Test of Engine Stall Induced by Wing-Level Stall Maneuver

利用飞行试验的方式,选取相同高度和马赫数条件,对某尾吊布局飞机进行机翼水平失速试验,考核几种发动机功率状态对进气畸变的响应。试验结果表明:除飞行慢车状态外,其他几种功率状态均捕捉到了发动机失速掉转现象,且捕获的发动机失速为典型的可恢复失速;尾吊布局的发动机,进气畸变水平随攻角的增大而增大;发动机随着功率状态的增加趋向于更易失稳的状态。另外,飞机姿态变化速率分析表明,飞机姿态剧变是发动机失速掉转的诱因之一。

Wing-level stall flight tests have been done to examine the response of engine power to inlet dis-tortion, using a tail mounted aircraft at the same height and speed. Engine speed drop phenomena have been captured in several power cases, except flight idle power. The test results show that the engine stall drop phenomenon is a typical recovery stall; the engine inlet distortion increases with the angle of attack;the higher engine power level becomes the more unstable tends to be;the analysis of aircraft attitude rate in-dicates that the dramatic change of aircraft attitude may be one of the causes for the engine stall.