压气机引气系统典型减涡器减阻特性对比分析

为对用于压气机引气系统的典型减涡器结构的减阻特性进行对比，采用数值模拟与试验研究相结合的方法对带三种典型减涡器的径向内流共转盘腔模型开展研究，并与无减涡器共转盘腔基准模型进行了对比。模型试验验证了数值模拟方法的可靠性，通过数值模拟，分析了各模型流场结构、速度分布、哥氏力分布和压力损失特性，对典型减涡器的减阻特性有了更深入的认识。结果表明：虽然三种典型减涡器结构差异较大，通过布置不同结构的减涡器，降低或抑制了共转盘腔内旋流比的增长速度和幅度，显著降低了压气机引气系统径向内流共转盘腔的压力损失，获得相近的减阻效果。与基准模型相比，在计算模型进出口截面间，去旋喷嘴式减涡器模型压力损失降低了73.4%；管式减涡器模型压力损失降低了80.7%，翅片式减涡器模型压力损失降低了84.5%。

Comparative Analysis of Flow Resistance Reduction Characteristics of Typical Vortex Reducers in Compressor Bleed Air System

In order to compare the flow resistance reduction characteristics of the typical vortex reducer structure used in the compressor air bleed system, combined numerical simulation and experimental study were promoted to study the radial inflow co-rotating cavity model with three kinds of typical vortex reducer and compared with the basic co-rotating cavity model without vortex reducer. The model test verified the reliability of the numerical simulation method, the flow field structure, velocity distribution, Coriolis force distribution and pressure loss characteristics of each model were analyzed through numerical simulation and the flow resistance reduction mechanism of typical vortex reducers was further understood. The results show that, although the structures of these vortex reducers are quite different, the growth rate and amplitude of the swirl ratio in the co-rotating cavity are reduced or suppressed through the arrangement of different kinds of vortex reducer device, then the pressure loss of the radial inflow co-rotating cavity in the compressor air bleed system is significantly reduced, and similar flow resistance reduction effect is obtained. The pressure loss between the inlet and outlet section of the calculation model is reduced by 73.4%, 80.7% and 84.5% of the de-swirled nozzle vortex reducer, tubed type vortex reducer and fin type vortex reducer respectively compared with the basic model.