本文通过求解二维不可压N-S方程,对某三级低速轴流压气机的第一级进行数值模拟.首先用定常计算得到了该级的稳态性能曲线,然后在级出口加上节流阀进行非定常计算,模拟压气机进入失速的整个过程,重点是先兆的发展和内部流场的分析.计算结果表明,当阀门关到某个位置,无外加扰动,像数值误差这样的小扰动就能使压气机失速.本文还讨论了不同轴向计算域、关阀门速率等对模拟结果的影响.
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