自适应处理机匣在多级轴流压气机中的应用

设计了一种环腔导流片式自适应处理机匣,采用定常数值方法研究了不同导流片形式对亚声多级轴流压气机流场的影响。结果表明:导流片与转子弦向垂直时的处理机匣减弱了叶尖前缘溢流强度,抑制了间隙泄漏流发展,提高了转子叶尖通道的流通能力,使得压气机在0.8倍设计转速以上特性基本保持不变的同时,大幅度提高了低转速的稳定裕度,其中0.7倍设计转速时近失速点总压比增大10.2%,近失速流量拓宽8.5%,体现出较好的自适应扩稳能力。 

Application of adaptive treatment casing in multi-stage axial compressor

An adaptive treatment casing with annular cavity guide vane was designed. The influence of different guide vanes on the flow field of subsonic multistage axial compressor was studied by means of steady numerical method. Results showed that when the guide vane perpendicular to the rotor chord wise weakened the leading edge overflow intensity of the blade tip, the treatment casing restrained the development of clearance leakage flow, improved the flow capacity of the rotor blade tip passage, and made the compressor basically unchanged while the speed characteristic was above 0.8 design speed, the stability margin of low speed was greatly improved, in which the total pressure ratio at the near-stall point increased by 10.2% at 0.7 design speed and the near-stall flow rate expanded by 8.5%, showing the strong adaptive stability-expanding ability.