摘要
通过某型号涡轮气冷叶片的设计与验证,建立了一种简化的气冷叶片流热解耦设计模拟方法,结合对流冷却、冲击冷却的实验结果,通过调整冷气参数,达到控制叶片表面温度的要求。在平面叶栅热风洞中,通过调整尾流板角度,控制叶片表面流动状态,满足叶栅流动的周期性条件,保证了热测量的正确性。完成了气冷叶片的设计、分析与验证的系列工作,为今后研制气冷叶片建立了扎实基础。
A new decoupled fluid flow and heat transfer model is proposed to design the internal cooling structure of air cooled gas turbine blades. The method is used for one supposed turbine guide vane and tested on hot wind tunnel. Experimental data in open literature is used to impose coolant flow parameters of impinging and convection heat transfer to satisfy the requirements of blade surface temperature. In the linear cascade test, tailboard is used to match the blade surrounding flow to the actual periodic one. Heat transfer on blade surface is ensured also as in periodic cascade flow. Design, numerical analysis and test validation of turbine cooled blade are completed. It is the starting step and basic capacity for further development.
出处
《热力透平》
2013年第4期276-282,共7页
Thermal Turbine
关键词
气冷叶片
热流耦合
解耦设计
对流冷却
air-cooled blade
heat-flow coupled
descoupling design
convective cooling
