以某水电站泄洪洞为研究对象,结合大比尺水工模型试验,采用RNG k-ε数值模型,利用VOF法追踪自由液面,对龙抬头泄洪洞的流场进行了三维水力特性的数值模拟,并提出2种增加掺气设施的修改方案。结果表明:数值模拟结果与水工模型实测值吻合较好,该方法可以较好地模拟三维流场;增加掺气设施后可以有效地减轻下游反弧段的空蚀破坏。
Abstract
The 3-D flow fields of high-head spillway tunnel with its inlet raised was numerically simulated using VOF method to track the free surface based on RNG k-ε turbulence model. The numerical model was verified by the results of large-scale model test. The computational result and experiment result agreed well. Two modification proposals for aeration facilities were presented. The result demonstrates that the modified aeration facilities could effectively avoid the cavitation damage in the downstream anti-arch section, and this turbulence flow model could well simulate the 3-D flow field.
关键词
长江流域 /
山洪灾害 /
预警难度 /
层次分析 /
防洪减灾
Key words
Yangtze river basin /
mountain torrent disaster /
warning difficulty /
analytical hierarchy process /
flood prevention and disaster mitigation
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参考文献
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基金
国家自然科学基金创新研究群体科学基金 (51321065)
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