溃坝水流冲击水垫塘的SPH模拟

为明晰溃坝水流冲击水垫塘的过程,依据光滑粒子流体动力学方法,建立了包含下游水位的溃坝模型,应用虚粒子法进行边界处理,模拟了溃坝后孤立波的运动过程,将其计算结果与刘维平等所模拟水体运动轨迹进行对比,发现两者水位契合度高,验证了所提计算方法的准确性。在此基础上,建立了包含二道坝的水垫塘模型,水垫塘宽120m、深10m,模拟了溃坝水流冲击水垫塘的过程,并对流态、流速、压强等属性进行分析。结果表明,SPH法对于冲击过程中水流的翻卷、回旋等强非线性特征能够做到精确模拟,为后续利用SPH方法进行消能工体型优化奠定了基础。

SPH Simulation of Dam Break Flow Impacting Plunge Pool

In order to clarify the process of the dam-breaking water impacting the water cushion pond,a dam-breaking model including the downstream water level was established based on the smooth particle hydrodynamic method.The virtual particle method was used for boundary treatment to simulate the rupture.The calculated results were compared with the simulated water trajectory by Liu weiping.The water level of the two is consistent,which verifies the accuracy of the calculation method in this paper.On this basis,a water cushion pond model including Erdaoba was established.The water cushion pond was 120mwide and 10mdeep,and the process of the dam-breaking water impacting the water cushion pond was simulated,and the attributes of flow regime,velocity,and pressure were analyzed.The results show that the SPH method can accurately simulate strong non-linear features,such as water flow rollover and whirlpool during the impact process,which provides a basis for the subsequent optimization of the shape of the energy dissipator using the SPH method.