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涡轮平面叶栅端壁附近的流动和损失
引用本文:刘高文,董素艳,刘松龄.涡轮平面叶栅端壁附近的流动和损失[J].推进技术,2000,21(1):60-63.
作者姓名:刘高文  董素艳  刘松龄
作者单位:西北工业大学,航空动力与热力工程系,陕西,西安,710072
基金项目:国家自然科学基金资助项目 !( 5 94 760 11)
摘    要:用五孔针对涡轮导向叶栅流场作了详细测量,着重研究了端壁附近的三维流动,分析了叶栅中的二次流现象和流动损失机理。在实验中清楚地探测到了通道涡和马蹄涡的两个分支。实验发现通道涡主宰了整个二次流流场,马蹄涡吸力面分支在与通道涡的相互作用过程中强度逐渐减弱直至消失。在0.62Cx截面及其下游截面的吸力面附近,还发现了一个显著的低速高损失核,该核在吸力面上向上爬升并一直延续到叶栅下游。

关 键 词:涡轮叶栅  二次流  涡流损耗  流场测量  槽道  端壁

Secondary flow measurements and flow losses near the endwall of linear turbine cascade
Liu Gaowen,Dong Suyan and Liu Songling.Secondary flow measurements and flow losses near the endwall of linear turbine cascade[J].Journal of Propulsion Technology,2000,21(1):60-63.
Authors:Liu Gaowen  Dong Suyan and Liu Songling
Abstract:Measurements of the basic flow fields was made in a turbine cascade with five hole probe Special attentions were given to the three dimensional flow in the near enrdwall region between adjacent blades The relations between secondary flow and loss generation in a cascade were studied The experimental data show that passage vortex dominates the whole secondary flow fields and the two legs of horseshoe vortex are clearly identified But the suction side leg of horseshoe vortex would weaken itself and disappear gradually as the result of interacting with passage vortex On the traversing plane of x=0 62C x and the planes followed, a noticeable low momentum high loss core is found near the suction surface This core climbs upwards on the suction surface till to the far downstream of cascade
Keywords:Turbine  Turbine cascade  Cascade flow  Vortex flow  Secondary flow  Flow distribution  Eddy current loss  
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