Effects of Various Geometric Features on the Performance of a 7:1 Pressure Ratio Deeply Scalloped and Split Radial Turbine in a Gas Turbine Engine  

作　　者：GAO Chuang HUANG Weiguang 

机构地区：[1]Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Thermal Science》2022年第1期25-34,共10页热科学学报（英文版）

基　　金：This work was supported by the Key Programs of Chinese Academy of Sciences under Project No.ZDRW-CN-2017-2;Innovation Academy of Light-duty Gas Turbine with Project No.CXYJJ19-ZD-01;Changde Institute for Integrated Energy Technology with Project No.El6429ICO 1.

摘　　要：A 2 MW gas turbine engine has been developed for the distributed power market.This engine features a 7:1 pressure ratio radial inflow turbine.In this paper,influences of various geometry features are investigated including turbine tip and backface clearances.In addition to the clearances,the effects of the inducer deep scallop and exducer rounded trailing edge are investigated.Finally,geometric features associated with a split rotor(separate inducer and exducer)are studied.These geometry features are investigated numerically using CFD.Part of the numerical results is also compared to experimental data acquired during engine test to validate the CFD results.

关 键 词：radial turbine high pressure ratio SCALLOP LEAKAGE CLEARANCE 

分 类 号：TK471[动力工程及工程热物理—动力机械及工程]