一种热气防冰系统的数值仿真  

Numerical Simulation of an Airfoil Hot-air Anti-icing System

作　　者：卜雪琴[1] 郁嘉[1] 林贵平[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191

出　　处：《计算机仿真》2010年第9期40-43,74,共5页Computer Simulation

摘　　要：飞机在飞行过程中,结冰问题,会增加重量,影响稳定性。为了防冰,用2D翼型热气防冰系统,采用热气流方法并优化控制防冰腔结构,并进行了数值仿真,得到了防冰系统热力学数值仿真计算结果。计算采用计算流体力学CFD软件FLU-ENT,根据欧拉模型及用户自定义函数UDF,得到了局部水收集系数、翼型防冰热载荷和表面溢流水量。将外部热载荷与防冰腔内部热气流动与传热耦合计算,实现防冰腔内外表面的热交换仿真,计算出防冰腔内喷口射流以及表面换热量,保证表面温度在允许范围内达到防冰热气流量。结果表明了仿真方法在防冰系统设计研究中的可行性。An airfoil hot-air anti-icing system operating in a running wet regime was mathematically modeled and simulated. The results were obtained and compared to results from other numerical codes. The aim of the present work is to estimate hot-air mass flux needed for anti-icing system to maintain surface temperature,first by developing a mathematical model to simulate the local collection efficiency,the heat lost due to convection and evaporation,the runback water flows and water film ending point positions using the computational fluid dynamics （CFD） package FLUENT,and then by analyzing the heat transfer phenomena inside airfoil coupled with extern heat lost to obtain an balanceable temperature in airfoil skin. Results show that this simulation method can be applied to design of hot-air anti/de-icing system.

关 键 词：热气防冰系统 数值仿真 溢流 计算流体力学 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TP319[自动化与计算机技术—计算机科学与技术]