The accurate velocity potential equation is chosen as a mathematical model of the problem.

选用精确速势方程作为问题的数学模型。

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For potential flows on any stream surface, the equation of the velocity graph is set up by tensor analysis, and thus it provides an analytic method for solving some special flow problems.

本文利用张量分析工具，对任意流面上的位势流，建立速度图方程，为解决一些特殊流动问题，提供一个分析方法。

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