Numerical Study of Combining Steady Vortex Generator Jets and Deflected Trailing Edge to Reduce the Blade Numbers of Low Pressure Turbine Stage  

作　　者：Li Chao YAN Peigang Wang Xiangfeng HAN Wanjin WANG Qingchao 

机构地区：[1]School of Energy Science and Engineering,Harbin Institute of Technology

出　　处：《Journal of Thermal Science》2016年第6期511-517,共7页热科学学报（英文版）

基　　金：supported by the National Foundation for Innovative Research Groups of China(Grant No.51421063)

摘　　要：A flow control system that combined steady Vortex Generator Jets and Deflected Trailing-edge(VGJs-DT) to decrease the low pressure turbine(LPT) blade numbers was presented.The effects of VGJs-DT on energy loss and flow of low solidity low pressure turbine(LSLPT) cascades were studied.VGJs-DT was found to decrease the energy loss of LSLPT cascade and increase the flow turning angle.VGJs-DT decreased the solidity by 12.5%without a significant increase in energy loss.VGJs-DT was more effective than steady VGJs.VGJs-DT decreased the energy loss and increased the flow angle of the LSLPT cascade with steady VGJs.VGJs-DT can use 50%less mass flow than steady VGJs to inhibit the flow separation in the LSLPT cascade.The deflected trailing edge enhanced the ability of steady VGJs to resist flow separation.Overall,VGJs-DT can be used to control flow separation in LPT cascade and reduce the blade numbers of low pressure turbine stage.

关 键 词：Vortex cascade turbine resist blade Turbine Numbers turbulence projection pitch 

分 类 号：TK14[动力工程及工程热物理—热能工程]