Implementation of a Full Momentum Conservative Approach in Modelling Flow Through Tidal Structures
Implementation of a Full Momentum Conservative Approach in Modelling Flow Through Tidal Structures
复制标题
潮汐结构流动建模中全动量保守方法的实现
作者：
Nejc Čož;R. Ahmadian;R. Falconer
近年来，了解沿海水库和潮差蓄水池等各种水工建筑物的影响一直是水文环境工程的关键挑战之一。在过去的半个世纪里，英国的几个潮差计划提案已经过审查，然后由于环境足迹和/或电力成本的不确定性而被放弃。因此，了解这些项目的可靠水动力分析的基本假设是至关重要的。本研究采用一种新的方法研究了完全守恒的动量通过潮汐结构的影响。该方法被应用到2D和3D版本的斯旺西湾潮汐泻湖的区域模型，检查两种不同类型的速度分布在涡轮机出口。简化的分布显着增加了发电期间离开涡轮机的射流的速度和长度。一个真实的分布给出了更准确的结果，射流速度更接近于不包括动量的情况。具有真实分布的3D模型显著改善了所得到的垂直速度剖面。经改进的动量守恒方法的价值已证明在当地规模的研究中特别有用。该方法可推广应用于其它类似水工建筑物，并可用于泥沙输移、水质等分析。
Understanding the impact of various hydraulic structures, such as coastal reservoirs and tidal range impoundments, has been one of the key challenges of hydro–environmental engineering in recent years. Over the last half-century, several proposals for tidal range schemes in the UK have been scrutinised and then abandoned due to the uncertainty over the environmental footprint and/or the cost of electricity. Therefore, it is essential to understand the fundamental assumptions for reliable hydrodynamic analysis of these projects. This study examined the impact of the fully conserved momentum through tidal structures using a novel approach. The method was applied to 2D and 3D versions of the regional model of Swansea Bay tidal lagoon, examining two different types of velocity distribution at turbine exit. A simplified distribution significantly increased the velocity and length of the jet exiting the turbines during power generation. A realistic distribution gave more accurate results, with jet velocities more closely resembling the situation without including the momentum. The 3D model with realistic distribution has markedly improved the resulting vertical velocity profile. The value of the improved methodology for momentum conservation has proved to be particularly useful in local-scale studies. It can be applied to other similar hydraulic structures and used for the analysis of sediment transport, water quality, etc.
影响因子：
11.2
作者：
A. Angeloudis;S. Kramer;A. Avdis;M. Piggott
通讯作者：
A. Angeloudis;S. Kramer;A. Avdis;M. Piggott