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本文采用摄动伽辽金（Ｇａｌｅｒｋｉｎ）杂交方法，应用计算机代数与符号运算术解亚声速圆柱绕流。对给定的马赫数，获得了速度势的近似解表达式，并与Ｊａｎｚｅｎ－Ｒａｙｌｅ－ｉｇｈ方法进行了对比。计算结果表明本方法精度高，计算工作量小，解的表达式简洁。
In this paper, we use the Galerkin hybridization method to solve the subsonic circular flow around the subsurface by using computer algebra and symbolic arithmetic. For a given Mach number, an approximate solution to the velocity potential is obtained and compared to the Janzen-Rayleigh method. The calculation results show that this method has the advantages of high precision, small calculation workload and simple expression of solution.