基于FLOW-3D的不同消力池水跳数值研究

IF 2.1 4区 环境科学与生态学 Q2 ENGINEERING, CIVIL
Muhammad Waqas Zaffar, I. Hassan
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引用次数: 2

摘要

团沙拦河坝的止水盆地是美国垦务局(USBR) iii型盆地的改进形式,包括冲击挡板和摩擦块。拦河坝投入使用后不久,人们发现拦河坝被连根拔起。此外,以往的研究也强调了矩形挡板的问题,即阻力小,尾迹区小,流动再附着。相反,楔形分流块的使用在引水拦河坝下游被发现是有限的。因此,本研究主要利用FLOW-3D分析楔形分流块对水跃和消能的水力影响,确认其在引水拦河坝下游的适用性。研究主要考察了三种不同止水池的自由面分布、辊筒长度、相对能量损失、速度分布和湍流动能。自由面剖面结果表明,新盆地稳定了HJ,产生了更短的HJ长度。结果还表明,随着流量的增加,新流域的辊子长度减小。同样,随着流量的增加,新流域的相对能量损失也增加。此外,在HJ内和盆地末端,新盆地的速度和湍流动能衰减幅度更大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical investigation of hydraulic jump for different stilling basins using FLOW-3D
Stilling basin of the Tuansa barrage is a modified form of the United States Bureau of Reclamation (USBR) Type-III basin, which includes impact baffle and friction blocks. Soon after the barrage's operation, baffle blocks were found to be uprooted. Additionally, previous studies also highlighted the issues of rectangular baffle blocks, i.e., less drag, smaller wake zone, and flow reattachment. On the contrary, the use of wedge-shaped splitter blocks is found limited downstream of diversion barrages. Therefore, this study focuses on the hydraulic effects of wedge-shaped splitter blocks on hydraulic jump (HJ) and energy dissipation using FLOW-3D and confirms its suitability downstream of the diversion barrage. The study mainly investigated the free surface profiles, roller lengths, relative energy losses, velocity profiles, and turbulent kinetic energies for three different stilling basins. The results of free surface profiles indicated that new basins stabilised the HJ and produced smaller lengths of HJ. The results also showed that as the flow increased, the roller lengths decreased in the new basins. Similarly, with an increase in the flow, the relative energy loss increased in new basins. Furthermore, within HJ, and at the basins' end, the results showed higher decay of velocity and turbulent kinetic energy in the new basins.
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来源期刊
CiteScore
4.10
自引率
21.10%
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