发动机唇口防冰腔的热变形仿真分析

Thermal Deformation Simulation Analysis for Anti-Icing Cavity of Engine Inlet

双蒙皮热气防冰腔在加热防冰过程中,内、外蒙皮的温度相差较大,热膨胀变形将导致两层蒙皮之间的间隙发生变化,进而影响防冰效果,甚至堵塞防冰通道。以发动机唇口热气防冰系统为研究对象,为解决双蒙皮防冰腔的热变形问题,选择了在双蒙皮之间增加垫板进行补偿的方式,采用有限元方法对防冰腔的热变形情况进行仿真分析,得到了不同垫板数量条件下的防冰腔最大热变形区域、防冰腔的热变形情况及变化规律,为双蒙皮防冰腔的设计提供依据。

During the heating process of hot air anti-icing cavity,the temperature difference between the inner and outer skin is large,which will result in the changes of the gap between the two skins due to the thermal expansion deformation and influence anti-icing effect,even block anti-icing passageway.This paper is focused on the hot air anti-icing system of a certain engine inlet aspect.In order to solve the thermal deformation of double skin anti-icing cavity,the method of adding the number of shims between the two skins is chosen.The finite element method was used to analyze anti-icing cavity＇s thermal deformation,and obtained the maximum thermal deformation area and the change law of thermal deformation the anti-icing cavity of under different number of shims conditions,which provides the design foundation of the double skin anti-icing cavity.