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动态潮汐能是一种新型的潮汐能开发方式,由荷兰海岸工程师Hulsbergen和Steijn提出,具体为建立一个长度为几十千米以上且垂直于海岸线的T型坝,使沿岸的潮汐波变形,从而在坝的两侧产生水头差,可用于潮汐能发电。不同的大坝尺寸会产生不同大小的水头,理论公式和数值模型均被用于计算该水头大小。本研究利用Kolkman公式和平直海岸二维潮流模型,分别计算了作用在大坝上的动态水头并进行无量纲处理,对比发现两种方法获得的结果较为接近。其中采用Kolkman公式所获结果略小,说明在开阔海域中海底阻力对动态潮汐能起次要作用,Kolkman公式忽略阻力项的算法是可行的,理论公式也同样能够反映潮汐和大坝的相互作用,通过Kolkman公式和数值模拟结果的互相验证,可以提高水位差的计算准确度。
Dynamic tidal energy is a new form of tidal energy development proposed by Dutch coastal engineers Hulsbergen and Steijn, specifically to create a T-shaped dam of tens of kilometers in length and perpendicular to the coastline, deforming tidal waves along the coast Water head difference on both sides of the dam, can be used for tidal power generation. Different dam sizes will produce different size of the head, the theoretical formula and numerical model are used to calculate the head size. In this study, the Kolkman formula and the two-dimensional tidal current model of Straight Coast were used to calculate the dynamic head acting on the dam respectively and to do the non-dimensional treatment. The results of the two methods were found to be similar. Among them, Kolkman’s formula is slightly smaller, which shows that the submarine drag plays a minor role in dynamic tidal energy in open sea. Kolkman’s formula ignoring the drag term is feasible. The theoretical formula can also reflect the interaction between tidal and dam , Through the Kolkman formula and numerical simulation results of mutual verification, can improve the calculation accuracy of water level difference.