【摘要】：為優(yōu)化閘門體型,探究不同底緣形式下閘門的水力學特性,采用RNG k-ε模型和VOF方法,結(jié)合動網(wǎng)格劃分技術,對高水頭平板閘門閉門過程中水力學特性進行了數(shù)值模擬分析。采用模型試驗實測數(shù)據(jù)驗證了數(shù)值方法的可靠性;利用非平穩(wěn)隨機過程處理技術(EMD),有效地提取底緣壓力趨勢項,進而開展底緣形式與水流脈動、持住力相關關系的探討;通過綜合考量底緣壓力脈動、空化及持住力特性,尋求最佳底緣體型。結(jié)果表明,閘門底緣形式的改變對啟閉力影響顯著,前傾角底緣形式啟閉力最小,底緣壓力脈動較小,最不易出現(xiàn)空蝕破壞。
[Abstract]:In order to optimize the shape of the gate and explore the hydraulic characteristics of the gate in different bottom edge forms, the hydraulic characteristics of the high head flat gate in the closed process were simulated and analyzed by using RNG k- 蔚 model and VOF method, combined with the technology of dynamic mesh generation. The reliability of the numerical method is verified by the measured data of the model test, the pressure trend term of the bottom edge is extracted effectively by using the non-stationary stochastic process processing technique (EMD), and the relationship between the bottom edge form and the flow pulsation and the holding force is discussed. By considering the pressure pulsation, cavitation and holdup characteristics of the bottom edge, the optimum bottom edge shape can be obtained. The results show that the opening and closing force is significantly affected by the change of the bottom edge of the gate, the opening and closing force of the front angle bottom edge is the least, the pressure pulsation at the bottom edge is smaller, and cavitation damage is most difficult to occur.
【作者單位】： 天津大學水利工程仿真與安全國家重點實驗室;
【基金】：國家自然科學基金(51579172)
【分類號】：TV135;TV663.1

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