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洞塞式泄洪的数值模拟

Keywords: 数值模拟,RNGκ-ε数学模型,洞塞式泄洪,最小压强系数

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Abstract:

针对洞塞式泄洪的特征,分析了水流紊动特点,建立了三维RNGκ-ε紊流模型,并利用物理模型试验对其计算结果进行了验证;对洞塞式泄洪沿程的最小压强系数进行了计算,分析结果表明,最小压强系数沿程在洞塞突缩端和突扩端附近呈现明显的双峰分布.其他参数一定的情况下,主次峰区的最小压强系数峰值随洞塞段相对长度增加而相应降低;最小压强系数的峰值随突缩比增加明显降低.突缩比比洞塞段相对长度对最小压强系数的影响更为明显.

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