【摘要】 为了验证VOF水气两相流模型在模拟有丁坝等影响的复杂流动方面的可靠性,进行了一系列的丁坝水槽实验,并用VOF模型对实验进行了模拟。实验中,丁坝布置包括单丁坝和双丁坝情况,每种丁坝又包括上挑、正挑和下挑3种角度,流量条件分别为绕流和漫坝两种情况。模型计算结果与实测值比较,二者吻合很好。结果表明:VOF模型对于模拟复杂流动有推广价值。本文将VOF模型应用于实际工程———黄河潘家台滩2km长重点整治河段,对两种推荐方案进行了模拟分析,提出方案2为优选方案。更多还原

【Abstract】 In order to prove the superiority and the applicability of VOF (Volume Of Fluid) technique to simulate the complex flow field with free surface, a series of flume experiments are carried out and VOF model is used to simulate the free surface and the flow field affected by the groynes in the experimental flume. According to the orientation of groynes, angles from the flow direction to the axes of the groyne used in the experiments are assorted to obtuse angle, right angle, and acute angle. For each arrangement, flow conditions are classified to the submerged and the non-submerged one. Velocities and the water level affected by single groyne and double-groyne are measured. The calculated results agree well with the experimental data. The VOF technique is also used to simulate the Panjiatai Shoal, which is 2 km long, and one of the key improvement reaches in the Yellow River. Two improvement schemes are compared and analyzed, and one of them is recommended by the simulation.更多还原