植物“柔性坝”过流水动力学方程的建立及其数值模拟  

Establishment and Numerical Simulation of Overflowing Hydrodynamic Equation of Vegetation "Flexible Dam"

作　　者：刘锋[1,2] 邱秀云[1] 龚守华 周著[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,乌鲁木齐830052 [2]新疆农业大学发展规划处,乌鲁木齐830052 [3]新疆水利厅牧区水利规划总站,乌鲁木齐830000

出　　处：《新疆农业大学学报》2010年第4期354-358,共5页Journal of Xinjiang Agricultural University

基　　金：国家自然科学基金项目(50269003);新疆水利水电工程重点学科基金项目资助

摘　　要：植物"柔性坝"的存在干扰了原有的水流流态,使坝上游水深增加,水流流速减小,同时还增大河床糙率,削减了床面剪应力。通过室内物理模型试验的初期成果,推导建立清水条件下植物二维水动力学方程,对植物"柔性坝"过流时的水动力学特性进行了数值研究,并用有限元法进行了数值计算。将数值计算得到的流速值与模型试验流速值结果进行了比对,两者吻合较好,证明了所选数学模型和数值计算方法的可靠性。The vegetation ＂Flexible dam＂ interfered original flow pattern and made water depth of dam＇s upper reaches rise,flow velocity decrease,bed-surface roughness increase and bed shear stress reduce.The indoor physical model experiment was carried out to develop the two-demensional current power equation to be established to research overflowing hydrodynamic characteristics of vegetation ＂Flexible dam＂ and to numerically calculate it by finite element method.Then the both current velocity value drawn from numerical calculation and the current velocity value of the model experiment were identical,which proved that the mathematical model and numerical calculation method were quite dependable.

关 键 词：植物“柔性坝” 水动力学特性 数值模拟 

分 类 号：TV142.2[水利工程—水力学及河流动力学]