畸变进气对双轴涡喷发动机性能的影响

INFLUENCE OF INLET DISTORTION ON THE PERFORMANCE OF TWIN-SPOOL TURBOJET ENGINES

基于畸变进气下压气机实验特性,数值模拟了畸变进气下双轴涡喷发动机的总体性能。在数值模拟中,运用数据平滑技术,以消除实验数据的随机波动。由此,大大改善了程序的收敛性并提高了收敛速度。计算表明,畸变进气恶化了发动机的总体性能。在计算的转速范围内,畸变进气使得推力下降最多达到15％,耗油率增加最高达5.6％。

Based on experimental properties of compressor under inlet distortion, the performance of twin-spool turbojet engines is studied in this paper by means of numerical simulation. During the simulation, data smoothing has been employed so as to eliminate random fluctuation of experimental data. This process is helpful for improving the convergency and accelerates the convergent speed of the computer program. The results of simulation show that the inlet distortion decreases the thrust of engine by 15 percent and increases the specific fuel consumption by 5.6 percent.