期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：310
期号：3
页码：1-8
DOI：10.1088/1755-1315/310/3/032043
出版社：IOP Publishing
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.
