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用全速势方程求解绕翼型的跨音速流动时常用的计算方法有:SLOR方法、BGKJ方法(快速直接/SLOR混合方法)、隐式近似因子分解(AF)方法和多重网格法等。本文用其中的两种方法:BGKJ方法和AF2方法,以NACA 0012翼型为例进行了数值实验,比较了这两种方法的收敛速度。计算时,BGKJ方法用现有的计算程序,AF2方法则用最近自己编制的程序。数值实验的结果表明,BGKJ方法较AF2方法收敛速度快。
The commonly used methods to solve the transonic flow around an airfoil using the full-potential equation are SLOR method, BGKJ method (fast direct / SLOR hybrid method), implicit approximate factorization (AF) method and multi-grid method. In this paper, we use two methods: BGKJ method and AF2 method, taking NACA 0012 airfoil as an example, and compare the convergence speed of these two methods. When calculating, the BGKJ method uses the existing calculation program, and the AF2 method uses the program that has been prepared by itself recently. The numerical experiments show that the BGKJ method converges faster than the AF2 method.