波浪作用下曲面防波堤水力特性及波能损耗研究  

Study on hydraulics and wave energy dissipation as wave passing circular breakwater

作　　者：蒋学炼[1,2] 郭少龙[1] 李炎保[3] 

机构地区：[1]天津城市建设学院天津市软土特性与工程环境重点实验室,天津300384 [2]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [3]天津大学建筑工程学院,天津300072

出　　处：《海洋工程》2012年第3期59-67,共9页The Ocean Engineering

基　　金：国家自然科学基金资助项目(50779045);天津市自然科学基金资助项目(10JCYBJC03700);天津市高等学校科技发展基金资助项目(20080906);大连理工大学海岸和近海工程国家重点实验室开放基金资助项目(LP1104)

摘　　要：执行了一系列规则波与曲面防波堤相互作用实验。采用π定理确定了两种曲面防波堤(半圆堤和圆弧堤)反射透射水力特性的三个主要影响因素,包括入射波陡、相对水深和堤顶相对超高。基于实验数据对比分析了两种曲面防波堤的反射和透射特性,从能量守恒角度计算了波浪与曲面防波堤相互作用过程中的能量损耗率,并利用数值模拟探讨了波浪越堤过程中两种曲面防波堤波能损耗差异的机理,表明圆弧堤背浪面更强的尾涡区使得其局部能耗总体上高于半圆堤。A series of regular wave experiments were conducted to study the hydraulics of circular breakwaters including quarter circular breakwater and semi-circular breakwater （SCB）. Three influencing factors of the hydraulic performances, including wave steepness, relative water depth and relative freeboard height, were determined by using ~r theory. Based on the experimental data, the reflection and transmission coefficients of both circular breakwaters were compared and the wave energy dissipation as wave passing the breakwa- ters was calculated from the viewpoint of energy conservation. Finally, the differences between the wave energy dissipation of both breakwaters were discussed by employing the numerical simulations, which indicate the greater local energy dissipation as wave passing over the quarter circular breakwater is induced by the stronger trailing vortexes generated around the vertical rear wall.

关 键 词：曲面防波堤 反射 透射 波能损耗 水力特性 

分 类 号：U656.2[交通运输工程—港口、海岸及近海工程]