透平端部非定常流动及传热的数值研究  

Simulation of Unsteady Flow and Heat Transfer on the Turbine Endwall

作　　者：班宇[1] 陈榴[1] 潘丞雄 戴韧[1] BAN Yu;CHEN Liu;PAN Cheng-xiong;DAI Ren(College of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai,China,Post Code ： 200093;Shanghai Electric Gas Turbine Compony,Shanghai,China,Post Code： 200240)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]上海电气燃气轮机有限公司,上海200240

出　　处：《热能动力工程》2018年第7期25-31,共7页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51276116)~~

摘　　要：基于E^3透平第一级模型,通过将动叶放大对级进行约化,数值分析非定常下透平级内涡系结构的发展。静叶出口的涡系结构受下游动叶周向运动的影响,通道涡呈现抬升趋势。静叶出口总压损失比定常相对高1.22%。静叶出口的通道涡在下游动叶内传播,与动叶内的二次流涡系结构发生干涉,静叶出口的通道涡对动叶内的通道涡产生排挤作用。受非定常效应的影响,端壁上摩擦系数的分布呈周期性变化,其中吸力面前缘角区与分离线下游区域变化尤为突出。相比于定常计算的结果,非定常条件下端壁传热的平均水平提高,但是变动幅度降低。Based on the simulation of the first stage of E3 turbine ,the development of the vortices in the scaled turbine stage has been analyzed. The unsteady results reveal that the vortices at the exit plane of stator have been lifted due to the movement of rotors. The time-averaged total pressure loss is increased by 1.22% relative to steady case. The stator passage vortex moves into the rotor passage and interacts with the rotor secondary flow vortices. The rotor passage vortex has been pushed up by the stator passage vortex. Besides, the friction coefficient on the hub varies periodically, especially in the hub and suction comer close to the leading edge and region downstream of lift-off line. Compared to steady case, the time-averaged endwall heat transfer is increased, but the non-uniformity of heat transfer is alleviated.

关 键 词：透平级 二次流 动静干涉 总压损失 传热特性 

分 类 号：TK47[动力工程及工程热物理—动力机械及工程]