旋转双流程叶根弯道流动传热特性数值模拟  

Numerical simulation of flow and heat transfer characteristics in rotating double process of blade root passage

作　　者：尚梦雨 范青 张科[1] 雷蒋[1] SHANG Mengyu;FAN Qing;ZHANG Ke;LEI Jiang(State Key Laboratory for Strength and Vibration of Mechanical Structures,School of Aerospace,Xi'an Jiaotong University,Xi'an 710049,China;Xi'an Aerospace Propulsion Institute,Xi'an 710100,China)

机构地区：[1]西安交通大学航天航空学院机械结构强度与振动国家重点实验室,陕西西安710049 [2]西安航天动力研究所,陕西西安710100

出　　处：《火箭推进》2023年第2期42-50,共9页Journal of Rocket Propulsion

基　　金：国家自然科学基金(5177615、52076107);国家科技重大专项(2017-Ⅲ-0009-0035)。

摘　　要：旋转带来的叶片内部动-热负荷不均衡性会严重影响透平机械的安全与稳定。为研究旋转数和浮力系数对涡轮动叶片内部通道流动传热特性的影响,应用CFD仿真计算方法,分别以光滑和带肋的叶根弯道为对象,在旋转数分别为0、0.15、0.2、0.25、0.3和浮力系数分别为0、0.3、0.4、0.5、0.6的条件下进行模拟。结果表明:随着旋转数增加,科氏力作用增强,在科氏力指向侧的流动传热得以强化;浮力系数增大,旋转浮升力作用增强,会导致内流通道前后缘面出现双峰流,外流通道前缘面出现流动分离甚至产生回流;综合对比光滑通道和带肋通道,带肋通道的换热强度更大,且受到旋转效应的影响比光滑通道小。The imbalance of dynamic and thermal load inside the blade caused by rotation affects the safety and stability of turbomachinery seriously.In order to study the influence of rotation number and buoyancy coefficient on the flow and heat transfer characteristics in the internal passage of rotor blade,smooth and ribbed passages were simulated with CFD simulation under the conditions of rotation number 0,0.15,0.2,0.25,0.3 and buoyancy parameter 0,0.3,0.4,0.5,0.6,respectively.The results show that with the increase of rotation number,Coriolis force is enhanced and the heat transfer in the edge of same direction of Coriolis force is strengthened.With the increase of buoyancy coefficient,the effect of rotary buoyancy force will be enhanced,which will lead to the double peak flow state appeared at the leading and trailing edges of the inflow passage,and the flow separation or the even backflow occurred at the leading edges of the outflow passage.By the comprehensive comparison between the smooth passage and the ribbed passage,the heat transfer intensity in the ribbed passage is higher,and the effect of rotation is less than that of the smooth passage.

关 键 词：旋转 叶根弯道 流动传热 旋转数 浮力系数 斜肋 数值模拟 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]