基于Euler方程的二维翼型大迎角数值模拟
首发时间:2011-11-04
摘要:大迎角飞行以及机动特性是现代战机的重要特征之一,能够准确的模拟大迎角流场结构及预测相应的气动特性,对现代战斗机的整体设计至关重要。但目前最流行的商业计算流体力学软件FLUENT无法模拟大迎角问题,即迎角超过一定度数后,系统就会出现错误。针对这一缺点本文提出了改进方案,通过对物面边界条件进行特殊处理,进而求解二维欧拉方程,成功的得出了大迎角条件下的数值模拟结果,并分别对四种典型的二维翼型的大迎角流场结构及气动特性进行了数值模拟及对比分析,得到了满意的数值结果。
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Two Dimensional Airfoil Numerical Simulation at High Angles of Attack Based on Euler Equation
Abstract:High angle-of-attack aerodynamics has been a key element in configuration design to the present day with military airplanes. However, for the modern fighter aircraft designation, it is very important to exactly demonstrate the corresponding flow field structure and predict the aerodynamic. But, the most famous commercial CFD software FLUENT cannot deal with this problem at high angle of attack. When the angle surpasses a certain degree, the system will report error. In this paper a new improvement was proposed to overcome this shortcoming by special treatment to the solid wall boundary condition. And then via two-dimensional Euler numerical simulations it successfully predicted several classic two dimensional airfoils according to the high angle-of-attack aerodynamics and flow field. It also gave satisfied numerical simulation results by comparison and analysis.
Keywords: Numerical simulation High angle-of-attack Euler equation Two dimensional airfoil
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