水力发电学报2012，Vol.31Issue(6)：172-178,7.
T型坝两侧潮汐水动力特性的数值研究
Numerical study on hydrodynamic characteristics of tide on both sides of T-type dam
摘要
Abstract
A T-type dam perpendicular to coastline makes the tidal waves propagating along the coastline produce a phase shift in water level on its either side,causing certain water heads acting on it.This structure,when extracting tidal energy,obviously avoids formation of a basin by a traditional dam or barrage across an estuary or bay mouth,so as to reduce the basin-related negative effects on water transportation,migratory fish spawning and water environments.This paper studies the hydrodynamic features of the tides on both sides of the dam and examines the effects of the dam body and the headrace′s geometries on the acting head of these tide waves.To understand the effects of T-bar and T-stem lengths on the acting head,this study adopts a two-dimensional model to simulate the tide flow fields in the Bohai Sea and the north Yellow Sea,with a T-type dam located near Dalian.For a dam with a T-stem(or T-bar) of fixed size,the simulation reveals linear variation of the acting head with the T-bar(or T-stem) length.To improve the design,we put forward a T-dam with a large hole or a headrace inside its T-stem.Analysis of this new design′s hydrodynamic features shows that with the hole size increasing,the peak head over the dam decreases gradually,while the peak power output increases first and then decreases.Thus,a peak value of the greatest power output appears as the hole size varies.关键词
计算水动力学/T型坝/潮汐能/二维潮流模型/相位差/相差潮汐能Key words
computational fluid dynamics/T-shape dam/tidal energy/two-dimensional tidal flow model/phase shift/tidal energy due to phase shift in water level分类
海洋科学引用本文复制引用
郑思明,张永良,张庆河,张金凤..T型坝两侧潮汐水动力特性的数值研究[J].水力发电学报,2012,31(6):172-178,7.基金项目
国家自然科学基金 （）
清华大学自主课题计划 （）
863计划 （）
