高坝溢洪道三维紊流精细化数值模拟r与物理模型试验分析

摘要

Three-dimensional turbulence in high dam spilway is simulated by subdividing high-dense meshes and using standard k-ε turbulent model and VOF method. The discharge capacity, free water surface, time-average pressure, velocity field distribution, aerated cavity shape and water-air phase distribution on the baseplate are presented. High-dense meshes generation makes the calculated hydraulic parameters of spilway more elaborate. The results agree wel with the scale 1:65 physical model test, that further demonstrates the rationality of spilway weir profile and aerator type.%运用标准k-ε数学模型、VOF法对某高坝溢洪道进行三维紊流高密度网格数值模拟,得出泄流能力、自由水面、时均压力、流速场分布、掺气坎空腔形态及底板水气相分布.高密度网格剖分使溢洪道全程的计算水力参数更为精细,成果与1:65物理模型试验吻合较好,进一步论证了溢流堰面、掺气坎体形合理性.