积冰对飞机飞行性能的影响

针对飞机飞行过程中出现的积冰所带来的不利影响,提出一种求解积冰条件下飞行性能的思路.基于二维有限基本解法对翼型前缘的积冰形状进行预测;在计算飞行性能时,利用数值模拟的方法求解RNG(Renormalization Group) k-ε湍流模型下的雷诺平均N-S(Navier-Stokes)方程,对飞机全机流场进行解算,从而得出积冰状态下飞机的升力、阻力特性.最终结果表明:积冰严重影响着飞机的飞行性能,这与由相关实验得出的结论一致.该方法可应用于工程领域,对积冰条件下飞机的飞行性能进行快捷、有效地求解,为研究飞机防冰技术、提高飞行性能提供参考. 

Effect of ice accretion on aircraft flight performance

An engineering method was presented to deal with the problems of aircraft flight performance affected by ice accretion. Based on the calculation method placing linear varying strength vortex panels on airfoil contour, ice accretion shapes on the leading edges of airfoils were predicted. While computing aircraft flight performance affected by ice accretion, the numerical simulation method was used to solve RANS(Reynolds averaged Navier-Stokes) equations of RNG (renormalization group) k-ε turbulence model and calculate the flow field characteristics of the whole aircraft. Flight performance, including lift and drag characteristics, was obtained according to the simulation results. The lift and drag penalties showed that ice accretion can worsen aircraft flight performance severely. The agreement of this conclusion with some experimental results indicates that this method could be applied into engineering field to estimate aircraft flight performance which is affected by ice accretion quickly and effectively, and to provide references for developing de-icing technologies and improvement of the aircraft flight performance.