TITLE:
Study on the Influence of Blade Outlet Backsweep Angle on Performance of Impeller
AUTHORS:
Peng Jiang, Yong Tian, Bo Wang, Nannan Zhang
KEYWORDS:
Impeller, Blade Outlet Backsweep Angle, Performance, Isentropic Efficiency, CFD, Secondary Flow
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.12 No.4,
April
29,
2022
ABSTRACT: As an
important parameter of compressor impeller, the design value of blade outlet
backsweep angle has a great influence on the performance of impeller. In this paper, six
impellers with blade outlet backsweep angle β2B equal to 0°, 10°, 20°, 30°, 40°, and
50° were designed to evaluate the influences of impeller backsweep angle β2B on the performance,
characteristics of gas flow and equivalent stress using computational fluid
dynamics (CFD) and finite element analysis (FEA). Results indicated that the
performance curve for the outlet backsweep blade angle β2B of 50° has the largest stable operating range. The isentropic efficiency
of the impeller with backsweep angle β2B equal to 40° is 16.8% - 25.9% higher than that of the impeller with
backsweep angle β2B equal to 0°. When the blade outlet backsweep angle is 30°, the equivalent
stress distribution of the impeller is more uniform, the maximum equivalent stress is the smallest.