双级离心压气机回流器流动特点分析

设计了高负荷的双级离心压气机回流器,采用数值模拟的方法,分析了回流器内部主要流动结构,及其流动机理.基于对流动机理的认识,进一步对比分析了进口流场,叶片数,负荷分布形式对回流器流动结构和性能的影响.结果表明,改善进口流场、增加叶片数能够抑制回流器内部的二次流,增加回流器出口流场均匀性;负荷分布形式对回流器流动结构和性能影响较大,前加载的负荷分布形式能够得到更好的性能.

Analysis of the flow in return vanes of a two-stage centrifugal compressor

To examine the influences of some typical design parameters(the inlet flow condition,blade number,and vane loading distribution) on the performances of the return vanes in a two-stage centrifugal compressor,a series of return vanes were designed and analyzed numerically by 3-D viscous code.It was found that the secondary flows in the return vane were usually very strong;however,improving the inlet flow uniformity,increasing the blade number and optimizing the vane loading distribution could weaken the secon...