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介绍了一种水洞非对称收缩段的数值模拟方法和程序，计算采用有限体积预估修正格式求解非定常欧拉方程．结合具体水洞设计对几种典型收缩曲线的三维流场进行了计算和分析，给出了沿轴向的压力分布，出口截面速度分布及分布的均匀性，选出最佳曲线，为水洞的设计提供依据．结果表明：本文的计算方法和程序对于水洞或风洞的三元收缩段，是有价值的分析和辅助设计手段．
A method and procedure for numerical simulation of water tunnel asymmetric contraction are introduced. The finite volume estimation and correction format is used to solve the unsteady Euler equations. Combined with the specific water hole design, the three-dimensional flow field of several typical shrinkage curves are calculated and analyzed. The pressure distribution along the axial direction, the velocity distribution at the exit section and the uniformity of the distribution are given. The optimal curve is selected for the water tunnel The basis of the design. The results show that the calculation method and procedure in this paper are valuable analytical and auxiliary design methods for the ternary contraction section of a water tunnel or a wind tunnel.