三维内外热耦合计算热气防冰系统表面温度

提出了一种三维内外强固传热耦合计算热气防冰系统表面温度的方法并进行算例计算.外部表面传热系数计算采用附面层积分方法,内部热气流动与换热采用CFD(计算流体动力学)方法,利用FLU-ENT的用户自定义函数UDFs(user-defined functions)实现蒙皮外表面热载荷计算及热流边界条件的自动加载,使迭代自动推进.对表面温度及外部热载荷进行亚松弛来稳定迭代计算,用强固传热耦合迭代来加快计算速度.所研究的三维热气防冰系统表面温度计算新方法可应用于防冰系统的热性能验证及系统优化. 

Three-dimensional conjugate heat transfer simulation for the surface temperature of wing hot-air anti-icing system

The conjugate heat transfer of a 3-D wing hot-air anti-icing system was studied and a method for calculation of the surface temperature was presented in this paper.The method employed the commercial software package FLUENT and its user-defined functions(UDFs) to integrate tightly the external heat flux,internal heat flux and the thermal conduction in the skin.The external convective heat transfer coefficient was computed using the boundary layer integrated method,and the internal hot air flow and heat transfer was modeled using FLUENT.The iteration for the sequential coupling of internal,external and conductive heat transfer was implemented by automatically calculating the external heat flux and setting the heat flux boundary condition on the external surface with UDFs.This new method for a wing anti-icing system can be applied to verification of its feasibility and validity.