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旨在探索用多松弛格子Boltzmann方法模拟多维水击波的可行性.采用三维方法模拟了一维水电站简单管水击现象,得到准确的直接水击和间接水击过程,证明其能准确模拟压力波传播与反射特性;模拟了二维拐角衍射,得到与其他方法吻合的结果;详细分析了断波撞击三维台阶产生的反射和衍射现象,获得合理的压力分布.研究表明:多松弛格子Boltzmann方法稳定性好,精度较高,能够准确模拟水击波的传播、反射和衍射,可推广到实际问题研究中.
The purpose of this paper is to explore the feasibility of using multi-relaxation Lattice Boltzmann method to simulate multi-dimensional water shocks.The three-dimensional method is used to simulate the phenomenon of simple tube water hammer in one-dimensional hydropower station and get accurate direct water hammer and indirect water hammer. Wave propagation and reflection characteristics were simulated.The two-dimensional corner diffraction was simulated and the results were consistent with those obtained by other methods.The reflection and diffraction phenomenon caused by the three-dimensional step of the breaking wave was analyzed in detail to obtain a reasonable pressure distribution.The results show that the multi-relaxation lattice Boltzmann method is stable Good sex, high accuracy, accurately simulating the propagation, reflection and diffraction of water shock waves, which can be generalized to practical problems.