模拟冲压进气条件对PDE推力测量影响

研究了射流模拟冲压进气条件下,气源喷口尺寸和气源压头对脉冲爆震发动机(PDE)地面台架试验推力测量的影响,分析地面台架试验中阻力和测量推力随模拟进气条件变化的规律。研究结果表明,PDE充填速度随气源压头或气源喷口尺寸的增加而增加;PDE阻力随气源压头的增加线性增加,随喷口尺寸增加而增加;喷口尺寸在78~105 mm内,PDE台架测量推力随喷口尺寸增加而增加。

Influence of simulative flight condition on thrust measurement of pulse detonation engine

Influence of nozzle size and the jet flow dynamic pressure at nozzel exit under simulative flight condition on test bench thrust value of pulse detonation engine was studied.Variation law of test bench resistance along with diversification simulative flight condition was analyzed.It showed that the filling velocity and resistance of PDE increasing with nozzle size and flow dynamic pressure at nozzel exit,and resistance increasing linearly with flow dynamic pressure.Thus test bench thrust increased with nozzle size in the range from 78 to 105 mm.