Multi-point Optimization of Recirculation Flow Type Casing Treatment in Centrifugal Compressors

作     者：Min Thaw Tun Daisaku Sakaguchi 

作者机构：Nagasaki University 1-14 Bunkyo-machi 852-8521 Nagasaki Japan 

出 版 物：《Journal of Thermal Science》 (热科学学报（英文版）)

年 卷 期：2016年第25卷第3期

页      面：231-241页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0837[工学-安全科学与工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：financially supported by Harada memorial foundation and Japan Science and Technology Agency 

主　　题：离心式压缩机 优化设计 环流式 壳体 环形通道 流量范围 循环流率 外壳设计 

摘      要：High-pressure ratio and wide operating range are highly required for a turbocharger in diesel engines.A recirculation flow type casing treatment is effective for flow range enhancement of centrifugal *** ring grooves on a suction pipe and a shroud casing wall are connected by means of an annular passage and stable recirculation flow is formed at small flow rates from the downstream groove toward the upstream groove through the annular *** shape of baseline recirculation flow type casing is modified and optimized by using a multi-point optimization code with a metamodel assisted evolutionary algorithm embedding a commercial CFD code CFX from *** numerical optimization results give the optimized design of casing with improving adiabatic efficiency in wide operating flow rate *** analysis of design parameters as a function of efficiency has been *** is found that the optimized casing design provides optimized recirculation flow rate,in which an increment of entropy rise is minimized at grooves and passages of the rotating impeller.