基于SPH方法实用堰水流的数值模拟

发布时间：2018-04-23 17:59

本文选题：SPH方法 + 实用堰　；参考：《水利水电技术》2017年11期

【摘要】：以数值模拟实用堰水流为目标,采用光滑质点水动力学方法,根据流量与上游水深关系,得到SPH方法推板模型入流边界。针对SPH方法明渠流动中的入流边界问题,利用添加推板模型的SPH方法对二维实用堰溢流水力特性进行数值模拟,获得实用堰水流水力特性,并进行物理模型试验,验证添加推板模型SPH方法的有效性。通过对流场、断面平均流速对比分析,结果表明:推板模型结果与试验结果吻合较好,推板模型可以准确的描绘水流运动状态;通过流量对比分析,在溢流过程中,推板模型与试验结果平均值相差-1.43%,推板模型可以保持实用堰上游水位恒定,提高计算精度。研究成果初步验证了推板模型的可靠性,为SPH方法入流问题提供了新的解决方法,具有一定的参考价值。
[Abstract]:Aiming at numerical simulation of practical Weir flow, a smooth particle hydrodynamic method is adopted. According to the relationship between flow rate and upstream water depth, the SPH method is used to push the plate model into the flow boundary. In order to solve the problem of inlet boundary in open channel flow of SPH method, the hydraulic characteristics of two-dimensional practical Weir are numerically simulated by SPH method, and the hydraulic characteristics of practical Weir flow are obtained, and the physical model tests are carried out. The effectiveness of the SPH method is verified. Through the comparative analysis of flow field and cross-section average velocity, the results show that the results of the push-plate model are in good agreement with the experimental results, and the push-plate model can accurately describe the state of water flow, and through the flow comparison analysis, in the overflow process, The difference between the average value of the push-plate model and the test results is -1.43. The push-plate model can keep the upstream water level of the practical Weir constant and improve the calculation accuracy. The research results preliminarily verify the reliability of the push-plate model and provide a new method for solving the SPH inflow problem, which has a certain reference value.
【作者单位】：青海大学水利电力学院;
【基金】：国家自然科学基金项目(51479087)
【分类号】：TV131.3

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