基于SPH方法挑流水舌的数值模拟研究

发布时间：2018-07-17 03:00

【摘要】：以数值模拟挑流水舌的运动特性为目标,采用光滑粒子动力学方法,根据水气两相流的运动规律,建立掺气水舌的SPH数学模型,根据空气阻力的作用特性和自由表面判据,得到了空气阻力的计算关系式,提出了掺气水舌的SPH数值解法。针对桓仁水电站泄洪雾化,进行了掺气水舌的SPH数学模型实例研究,所得到的光滑粒子运动图像刻画了挑流水舌与空气的相互作用,模拟了挑流水舌的掺气过程,并得到了掺气水舌的厚度和速度随其曲线长度的变化关系。结果表明,桓仁水电站挑流水舌的外缘挑距模拟值为82.2 m,原型观测数据为80.2 m,计算误差为2.49%。掺气水舌的挑距模拟值与其原观值基本一致,证明了掺气水舌SPH数学模型模拟挑流水舌运动的有效性和可靠性。
[Abstract]:In order to simulate the motion characteristics of the tongue with a numerical simulation, the SPH mathematical model of the aerated water tongue is established by using the smooth particle dynamics method and according to the motion law of the gas and gas two phase flow. According to the action characteristic of the air resistance and the free surface criterion, the formula for calculating the air resistance is obtained, and the numerical method of SPH numerical solution of the aerated water tongue is put forward. A case study of the SPH mathematical model of the aerated water tongue is carried out for the flood discharge atomization of Huanren hydropower station. The smoothed particle motion picture depicts the interaction between the tongue and the air, and simulates the aeration process of the water tongue, and the relationship between the thickness and velocity of the aerated water tongue with its curve length is obtained. The results show that Huanren is the same. The simulation value of the outer edge distance of the water tongue of a hydropower station is 82.2 m and the prototype observation data is 80.2 m. The simulated value of the calculation error of 2.49%. aerated water tongue is basically the same as that of its original values. It is proved that the validity and reliability of the motion of the tongue of the aerated water tongue SPH mathematical model simulates the motion of the pick water tongue.
【作者单位】：华北电力大学可再生能源学院;
【基金】：国家自然科学基金项目(51579100) 国家重点研发计划(2016YFC0401704)
【分类号】：TV135.2

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