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Indexed by:会议论文

Date of Publication:2011-12-01

Included Journals:EI、CPCI-S、Scopus

Volume:455-456

Page Number:351-355

Key Words:Centrifugal compressor; impeller; Leading edge; stree; numerical simulation; Von Mises

Abstract:In order to research the effects of leading edge shapes on the strength of centrifugal compressor compeller, the shrouded impellers of a large centrifugal compressor were introduced for finite element analysis. In the present study, the geometric models of 3 shrouded impellers were established in Solidworks 2007, and then numerical simulations were carried out using ANSYS. Through visualization of the computational result of the impellers with a square leading edge, a semi-circular leading edge and a elliptical leading edge, it was clarified by comparison that different leading edge shapes had significant influences on the compressor strength. According to the charts of the Von Mises stress versus leading edge shapes, it was indicated that approximately a 27% drop and a 32% drop in maximum Von Mises stress value occurred in the shrouded impellers of a semi-circular leading edge and a elliptical leading edge compared to a square leading edge respectively. That is, the semi-circular leading edge or elliptical leading edge employed in a centrifugal compressor would dramatically improve structural strength. This paper aims to provide the reference significance the structural optimization and reliability improvement of a large flow centrifugal compressor.