多项式温度分布下的自由盘湍流换热数值研究  

Numerical Research of Turbulent Flow Heat Transfer on Free Disc with Polynomial Temperature Profile

作　　者：王蕾[1] WANG Lei(School of Aircraft,Xi＇an Aeronautical University,Xi＇an 710077 ,China)

机构地区：[1]西安航空学院飞行器学院,陕西西安710077

出　　处：《西安航空学院学报》2017年第3期3-7,共5页Journal of Xi’an Aeronautical Institute

基　　金：国家自然科学基金项目(50806004)

摘　　要：在航空燃气涡轮发动机的二次流空气系统中,涡轮盘腔的流动和换热问题具有复杂的热边界条件,其流场和换热特性对发动机的设计具有重要作用。基于单项式和多项式边界条件下的自由盘的湍流流动换热模型,应用FLUENT进行数值研究。通过与理论值的对比,验证了使用Relizible k-ε湍流模型用于研究自由盘面上湍流的适用性。研究发现,对于不可压的湍流,盘面的局部努塞尔数受温度分布的控制,盘面温度为任意n次多项式分布下的局部努塞尔数可由盘面温度按0-n次单项式分布时的结果导出。In secondary air system of gas turbine engines, flow and heat transfer problems of turbine disc system usually appear with complex geometry, and flow and thermal boundary condition, and its flow distribution and heat transfer characteristics are of great importance for engine design. This paper centers around the turbulent flow on free disc with thermal boundary condition of monomial and polynomial temperature profiles applying software FLUENT. A comparison between numerical result and theoretical result verifies the applicability of turbulence model Relizible k-εto studying the flow on the free disc. Results show that： for incompressible turbulent flow, local Nusselt number on the disc surface is dominantly controlled by the temperature distribution;the theory for the turbulent flow is that the Nusselt number for an arbitrary polynomial temperature profile, with an order n,can be deduced from results of monomial profiles, with orders from 0 to n.

关 键 词：数值模拟 自由盘 湍流 努塞尔数 

分 类 号：V231[航空宇航科学与技术—航空宇航推进理论与工程]