Experiment study of vaned diffuser effects on overall performance and flow field of a centrifugal compressor

2019 2nd International Conference of Green Buildings and Environmental Management

生态环境科学

Zhao, Huijing^1 ; Lu, Xiang^1 ; Huang, Weide^1

China Ship Development and Design Center, Hubei Province, Wuhan

430064, China^1

关键词: Experiment investigation;    Experiment study;    Experiment tests;    Impeller inlets;    Leakage vortex;    Operating ranges;    Total pressure ratio;    Vaneless diffuser;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/310/3/032043/pdf
DOI  :  10.1088/1755-1315/310/3/032043

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The vaned diffuser has important effects on the overall performance and flow field of a centrifugal compressor, but the related experiment investigation is deficient. This paper compares the overall performance and flow field of a centrifugal compressor with three different diffusers: a vaneless diffuser and two vaned diffusers by experiment tests. The results show that, the vaned diffuser decreases the stable operating range and the flowrates at the choke and stall points. But it achieves higher total pressure ratio and efficiency at the low flowrate points. The vaned diffuser decides the flowrate at the choke point, and the impeller always operates with low flowrate. Therefore, the pressure always goes up from the impeller inlet to the leading edge of main blade within the whole operating range, and the original position of tip clearance leakage vortex is always near the leading edge of main blade.