轴流离心组合压气机性能及流场分析

以某轴流、离心组合式压气机为研究对象,采用数值模拟方法研究了不同转速典型工作状态下该压气机的性能和流场细微结构,为进一步提高压气机的压比、效率,扩大压气机的稳定工作裕度,对压气机进口导流叶片和第一级静子叶片安装角进行优化调节,对改进后压气机的典型工况进行了数值模拟,并进行了相应的试验研究。研究结果表明优化后压气机稳定工作范围增大,在90%设计转速和最大压比不变的情况下,最高效率提升1.05%,典型工况下流场结构也有不同程度的改善。

Flow field and performance investigation on an axial-centrifugal combined compressor

Based on the experiment in different condition,three-dimensional flow field of an axial-centrifugal combined compressor has been investigated by numerical simulation.In order to improve the performance of the axial-centrifugal combined compressor;the setting angel of inlet guide vane and first stator vane is changed.The investigation of numerical simulation and performance calculation for the axial-centrifugal compressor indicates that optimization of stator vane angle can enlarge stall and surge margin,weaken shock and improve the flow field structure in some blade rows.And the peak efficiency is increased by 1.05%,without changing the total pressure ratio at 90% design speed after changing angles of the inlet guide vanes and first stator vanes.