为了模拟含上游调压室水电站的水力过渡过程，采用TVD格式求解水击方程，并结合调压室系统的基本方程组和给定的边界条件来模拟水击压力变化。将此方法用于工程实例，其计算所得的水头与实测水头相吻合；并将计算所得的水头与MacCormark 格式和Lax-Friedrichs格式的计算结果比较，结果表明：TVD格式能有效模拟含上游调压室的水击现象，其结果具有耗散性低，不产生虚假数值震荡，计算精度高等优点。
Abstract
In order to simulate the hydraulic transient of the hydropower station which has upstream surge chamber,a TVD scheme is employed to solve the water hammer equations. In association with the basic equations of the surge chamber system and the given boundary conditions,the variation of water hammer pressure is simulated. The approach is applied to engineering practice and the calculated waterhead is consistent with measured data. Furthermore,the calculation result is compared with those calculated by using MacCormark and Lax-Friedrichs schemes. It’s revealed that the TVD scheme can effectively simulate the water hammer effect in the upstream surge chamber,and the calculation is less dissipative,non-oscillatory,and highly precise.
关键词
水击数值模拟 /
TVD格式 /
水力学 /
调压室
Key words
numerical simulation of water hammer /
TVD scheme /
hydraulics /
surge chamber
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参考文献
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