吸力和轴环对减小圆柱墩局部冲刷的影响

IF 1.4 Q4 WATER RESOURCES

Journal of Applied Water Engineering and Research Pub Date : 2021-05-02 DOI:10.1080/23249676.2021.1919225

Ehsan Afaridegan, M. Heidarpour, M. Goodarzi, Bashir Fallahi

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引用次数: 2

摘要

桥梁是河流工程中最重要的结构之一。桥墩周围的局部冲刷是造成桥梁破坏的重要原因之一。在本研究中，围护圈和吸力系统都是在桥墩上游进行局部冲刷。在不同的实验中，研究了不同尺寸的接箍模型，并考虑了不同深度的吸力系统。然后对颈圈-吸力联合模型进行试验。结果表明:在床层(Z/h = 0)吸力为(Qs/Q = 1.7%)时，吸力系统的效率为51%;3d长度、2d宽度的接箍效率为59%;联合吸环模型通过降低下流速度、雷诺数剪应力(RSSs)和湍流动能(TKE)来减少桥墩局部冲刷的效率为94%。

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Influence of suction and collar on reducing local scouring in cylindrical pier

Bridges are among the most important structures in river engineering. One of the significant causes of the destruction of bridges is local scouring around the piers. In the present research, collar and suction system both employed the upstream of the pier against local scouring. In separate experiments, the collar models were examined in different dimensions and the suction system was considered at different depth levels. Then, the combined collar-suction model was tested. The results showed that the suction system at the bed level (Z/h = 0) with the suction rate of (Qs/Q = 1.7%) had 51% efficiency; the 3D-length, 2D-width collar yielded 59% efficiency; and the combined suction-collar model had 94% efficiency in reducing local scouring of the pier by decreasing down-flow velocity, as well as the Reynolds Shear Stresses (RSSs) and Turbulence Kinetic Energy (TKE).

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来源期刊

Journal of Applied Water Engineering and Research WATER RESOURCES-

CiteScore

2.90

自引率

16.70%

发文量

期刊介绍： JAWER’s paradigm-changing (online only) articles provide directly applicable solutions to water engineering problems within the whole hydrosphere (rivers, lakes groundwater, estuaries, coastal and marine waters) covering areas such as: integrated water resources management and catchment hydraulics hydraulic machinery and structures hydraulics applied to water supply, treatment and drainage systems (including outfalls) water quality, security and governance in an engineering context environmental monitoring maritime hydraulics ecohydraulics flood risk modelling and management water related hazards desalination and re-use.