论文部分内容阅读
为了探究航空发动机吸入雨水后压缩系统的特性变化,针对水滴进入压气机后的湿压缩过程展开研究。基于两相流动的基本原理构建了气液两相的传热传质模型和颗粒运动模型,采用一维逐级叠加的方法计算压气机各级性能,并利用Fortran程序对吞雨后压气机整体性能进行了计算。计算结果表明当吞雨量从3%增加到15%时,压气机压比的下降幅度分别由5.7%增加至15.7%;压气机各级温比的变化特性揭示了液滴在压气机前面级蒸发小、后面级蒸发大的规律;通过对比干、湿压缩条件下的压气机整体特性,可得出吞雨后压气机稳定工作范围变窄的结论。
In order to investigate the characteristics of the compression system after the aero-engine inhaled rainwater, the wet compression process after the water droplets enter the compressor was studied. Based on the basic principle of two-phase flow, the heat and mass transfer model and the particle motion model of gas-liquid two-phase are constructed. The performance of each stage of the compressor is calculated by the one-dimensional stepwise superposition method. Performance is calculated. The calculation results show that when the amount of swallowing is increased from 3% to 15%, the pressure drop ratio of compressor increases from 5.7% to 15.7% respectively. The variation of temperature ratio at each stage of the compressor reveals that the droplet evaporates in front of the compressor Small, back-stage evaporation of a large law; Comparing the overall characteristics of the compressor under dry and wet compression conditions, the conclusion can be drawn after the compressor swallowed the stable working range narrowing.