非定常尾迹对旋转叶栅影响的数值研究  

Numerical Prediction of First-grade Cascade on the Effects of Unsteady Wakes

作　　者：郭婷婷[1] 王成荫[2] 冯博[2] 李少华[2] 耿晶梅 

机构地区：[1]北京国电龙源环保工程有限公司 [2]东北电力大学 [3]哈尔滨电站设备成套设计研究所

出　　处：《电站系统工程》2010年第2期12-14,共3页Power System Engineering

基　　金：国家自然科学基金项目(50606005)

摘　　要：采用SST k-ω紊流模型对非定常条件下尾迹对动叶栅的影响进行了数值模拟,给出不同截面涡量随时间发展变化的过程,对各种涡系的流动机理进行了分析。结果表明:动叶前缘区域内,涡旋脱落呈现明显的周期性;动叶尾缘区域内,涡的脱落随时间变化虽然仍有周期性变化的趋势,但已经不再具有严格的周期性。The SST k-ω turbulence model was performed to investigate the effects of unsteady wakes on the first-grade cascade. The development process of vortices on different sections was shown, and the structures mechanism was analyzed. Simulation results showed that vortex shedding presents obvious periodicity in the leading edge region of first-grade cascade. While in the trailing edge region, vortex shedding does not present obvious periodicity anymore, although there also has the trend of periodic change.

关 键 词：非定常尾迹 数值模拟 流场 动静叶干涉 

分 类 号：P435[天文地球—大气科学及气象学]