Study on the Influence of Blade Outlet Backsweep Angle on Performance of Impeller  

作　　者：Peng Jiang Yong Tian Bo Wang Nannan Zhang Peng Jiang;Yong Tian;Bo Wang;Nannan Zhang(Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China)

机构地区：[1]Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China

出　　处：《Open Journal of Applied Sciences》2022年第4期555-573,共19页应用科学（英文）

摘　　要：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 β_2B equal to 0°, 10°, 20°, 30°, 40°, and 50° were designed to evaluate the influences of impeller backsweep angle β_2B 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 β_2B of 50° has the largest stable operating range. The isentropic efficiency of the impeller with backsweep angle β_2B equal to 40° is 16.8% - 25.9% higher than that of the impeller with backsweep angle β_2B 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.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 β_2B equal to 0°, 10°, 20°, 30°, 40°, and 50° were designed to evaluate the influences of impeller backsweep angle β_2B 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 β_2B of 50° has the largest stable operating range. The isentropic efficiency of the impeller with backsweep angle β_2B equal to 40° is 16.8% - 25.9% higher than that of the impeller with backsweep angle β_2B 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.

关 键 词：IMPELLER Blade Outlet Backsweep Angle PERFORMANCE Isentropic Efficiency CFD Secondary Flow 

分 类 号：TH3[机械工程—机械制造及自动化]