不同底缘形式的平板闸门水力特性数值模拟
发布时间：2018-10-15 14:39
【摘要】：为优化闸门体型,探究不同底缘形式下闸门的水力学特性,采用RNG k-ε模型和VOF方法,结合动网格划分技术,对高水头平板闸门闭门过程中水力学特性进行了数值模拟分析。采用模型试验实测数据验证了数值方法的可靠性;利用非平稳随机过程处理技术(EMD),有效地提取底缘压力趋势项,进而开展底缘形式与水流脉动、持住力相关关系的探讨;通过综合考量底缘压力脉动、空化及持住力特性,寻求最佳底缘体型。结果表明,闸门底缘形式的改变对启闭力影响显著,前倾角底缘形式启闭力最小,底缘压力脉动较小,最不易出现空蚀破坏。
[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.
【作者单位】： 天津大学水利工程仿真与安全国家重点实验室;
【基金】：国家自然科学基金(51579172)
【分类号】：TV135;TV663.1
本文编号：2272864
[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.
【作者单位】： 天津大学水利工程仿真与安全国家重点实验室;
【基金】：国家自然科学基金(51579172)
【分类号】：TV135;TV663.1
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