基于RMA2模型的滩地风机基础水动力模拟研究

Hydrodynamic Simulation of Wind Generator Foundation in Overbank Based on RMA2 Model

基于RMA2模型,以雷诺形式N-S方程为基础、以加权余量伽辽金有限元为基本求解方法,在实测地形上对河道进行概化,采用二次三角形网格离散模拟区域并进行局部加密,模拟了电场建设前后辽河滩地风机基础周边河段的水位、流速、流场分布等特性。结果表明,电场建成后对河道水位、流速影响均较小,虽存在局部绕流现象,但影响范围较小,绕流迅速消退,为电场建设和河道防洪评价提供了科学依据。

Based on RMA2 model and Reynolds N-S equations, the river channel is generalized on measured terrain by taking weighted residuals Galerkin finite element as a basic solution method. And the secondary triangle mesh is applied to discrete and encrypt partially simulation domain. Then it simulates the river water level, flow velocity, flow field distri- bution characteristics around the wind generator foundation in Liaohe river overbank before and after wind power plant be- ing built. The results show that the river water level and velocity has little impact after power plant constructed although existence of local bypass flow phenomenon, the impact has a smaller range and it vanishes rapidly, which provides scien- tific basis for wind power plant construction and rive flood prevention evaluation.