Effects of Flow Pulsations from Potential flow Interactions and Shock Waves on Film Cooling as Applied to Gas Turbine Engines.

美国犹他州大学菲利普·M·利格拉尼，CTS-9615196摘要主要研究人员提出了一项关于整体流动脉动对气膜冷却影响的实验研究。这项工作与燃气轮机中的热传递有关。低速风洞将被用来在平板上产生边界层流动，在那里可以引入气膜冷却。体流脉动将由位于测试段出口处的旋转快门阵列产生。喷射剂的分布将通过使用摄像机和引入气流中的烟雾或雾的流动可视化来确定。根据热电偶数据和热流密度数据推导出测试表面的换热系数。热线风速计、压力探头和温度探头可用于获取边界层中的流动信息。

Ligrani, Philip M. University of Utah CTS-9615196 ABSTRACT The principal investigator proposes an experimental study of the effects bulk flow pulsations have on film cooling. The work is relevant to heat transfer in gas turbine engines. A low speed wind tunnel will be used to generate a boundary-layer flow over a flat plate where film cooling could be introduced. Bulk flow pulsations will be generated by an array of rotating shutters located at the exit of the test section. Injectant distributions will be determined by flow visualization using a video camera and smoke or fog introduced into the flow stream. Heat transfer coefficients at the test surface will be deduced from thermocouple data and heat flux data. Hot wire anemometers, pressure probes, and temperature probes are available for obtaining flow information in the boundary layer.