混合相结冰条件下多段翼的撞击黏附与积冰的数值模拟

Numerical Simulation of Ice Crystal Impact,Adhesion and Icing of Multi⁃element Airfoil Under Mixed⁃Phase Icing Conditions

随着飞机结冰问题研究的深入,混合相结冰问题已经成为研究热点。本文使用了阻力模型、黏附模型和结冰热力学模型来计算混合相结冰条件下的准三维多端翼的结冰情况。首先对多段翼进行了网格划分和空气流场计算。然后进行了数值模拟计算,分析了混合相结冰条件下冰晶的撞击、黏附和积冰特征。结果表明,在本研究的条件下,冰晶的黏附质量流量很高,会对飞行安全造成威胁,并且冰晶在溢流水区域也会发生黏附。此外,随着液态水含量(Liquid water content,LWC)与总水含量(Total water content,TWC)比值的升高,冰晶更容易黏附在表面并参与表面结冰。

The investigation of aircraft icing problems has led to a growing interest in mixed-phase icing.This paper used drag coefficient,adhesion,and icing thermodynamic models to calculate ice accretion on a quasi-threedimensional multi-element airfoil under mixed-phase conditions.Firstly,mesh generation and airflow field calculations are conducted on the multi-element airfoil.Next,numerical simulations are carried out to analyze the characteristics of ice crystals impingement,adhesion,and ice accretion under mixed phase conditions.The results show that the adhesion mass flow rate of ice crystals is high and can pose a threat to flight safety,and adhesion may also occur in the runback water zone.Moreover,with the increase of liquid water content(LWC)over total water content(TWC),ice crystals are more likely to adhere to surfaces and participate in surface icing.