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Date of Publication:2012-01-01

Journal:大连理工大学学报

Affiliation of Author(s):能源与动力学院

Volume:52

Issue:1

Page Number:29-34

ISSN No.:1000-8608

Abstract:A systematic investigation to understand the impacts of the
   variable-thickness blade on the structural strength and performance of
   the first stage impeller for a domestic large flow centrifugal
   compressor is undertaken.The geometric models of 9 shrouded impellers
   with variable-thickness blade are mainly established by CAD software
   Solidworks,static structural analyses are carried out using finite
   element software ANSYS,and CFD simulations are performed with the CFX
   code.Emphases are placed on the variation of maximal von Mises stress in
   FEM analyses,and the distinction of impeller internal flow behavior in
   CFD simulations.The variable thickness of blade is found to exert the
   great influence on the structural strength and performance of a
   centrifugal compressor.Furthermore,the computational results indicate
   that the appropriate increase of blade thickness close to trailing edge
   can remarkably improve the strength and aerodynamic characteristics of a
   shrouded impeller.Finally,the theoretical bases are given for the
   structural optimization and the performance improvement of a large flow
   centrifugal compressor and a nuclear reactor coolant cycling pump
   impellers.

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