基于δ-SPH方法的液体晃荡模拟与控制  

Simulation and Control of Liquid Sloshing Based onδ-SPH Method

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作  者:姚学昊 张旭明[1] 陈丁[1] YAO Xuehao;ZHANG Xuming;CHEN Ding(College of Mechanics and Materials,HoHai University,Nanjing 211100,China)

机构地区:[1]河海大学力学与材料学院,南京211100

出  处:《河南科学》2018年第12期1887-1895,共9页Henan Science

基  金:国家自然科学基金(51678215,51678216).

摘  要:针对传统光滑粒子流体动力学(Smoothed Particle Hydrodynamics,SPH)方法存在的压力振荡问题,建立了基于δ-SPH液体晃荡的数值分析模型,以提高压力计算的稳定性;为了减少计算量,采用一种简化的边界处理方法.与试验结果的比较验证了模型的有效性;为了控制液体的晃荡,添加了不同类型的中间挡板,研究了挡板高度及开孔大小对流态及压力分布的影响.结果分析表明:在液舱中添加中间挡板能够抑制液体晃荡,适当增加挡板高度可以获得更好的消能效果;小孔径带孔挡板的消能作用与不带孔挡板相近.Aiming at the pressure oscillation problem in conventional smoothed particle hydrodynamics(SPH)method,a numerical analysis model of liquid sloshing based onδ-SPH was established to improve the stability of pressure calculation,and a simplified boundary treatment method was adopted to reduce the calculation amount.The validity of the model is verified by comparing with the experimental results.In order to control the sloshing of liquid,different types of middle baffles were added and the effects of baffle heights and hole sizes on flow pattern and pressure distribution were studied.The results show that the liquid sloshing can be restrained by adding the middle baffle in the tank,and the better energy dissipation effect can be obtained by increasing the height of the baffle properly.The energy dissipation effect of the baffle with small holes is similar to that of the baffle without hole.

关 键 词:光滑粒子流体动力学 压力振荡 液体晃荡 δ-SPH 挡板 

分 类 号:O351.2[理学—流体力学;理学—力学]

 

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