摘要
通过CFD技术对某型多级离心压缩机内的流动进行了数值模拟,重点研究了多级离心压缩机级间装置如回流器、两类弯道内气动特点及其旋涡结构的特征,旨在揭示气流经弯道与回流器后气动参数的变化规律.结果表明,不同位置的弯道对流动的影响是截然不同的.由于这些静止部件对流体的扰动,使次级动叶的进口来流工况点偏离设计值,易于造成整机气动性能的下降.因此,多级压缩机的动叶设计应对来流的不均匀性加以充分考虑.
The numerical flow analysis in a multistage centrifugal compressor is presented. More importance is attached to the aerodynamic performance of the stationary components inside the compressor, such as deswirl cascade and two types of crossovers. The vortex structure inside the deswirl cast cade is also studied to disclose its influence on the aerodynamic performance, Jameson central scheme with Baldwin-Lomax turbulence enclosure is applied to Reynold＇s time-averaged N-S equations. The numerical investigation indicates： the flow through those stationary components may be distorted, resuiting in the deviation of operating condition for the downstream rotating impeller and in decrease of the total aerodynamic performance of the whole machine. The design of rotating impeller of multistage centrifugal compressor should fully take into account the upstream flow distortion.
出处
《上海理工大学学报》
EI
CAS
北大核心
2006年第2期115-119,共5页
Journal of University of Shanghai For Science and Technology
基金
上海市重点学科建设资助项目(能源岛关键技术及基地建设)
关键词
多级离心压缩机
回流叶栅
弯道
气动性能
multistage centrifugal compressor
deswirl cascade
crossover
aerodynamic performance
