振荡水柱装置前墙形状对能量转化效率影响的数值模拟

Numerical Simulation on Influence of Front Wall Shape of Oscillating Water Column on Energy Conversion Efficiency

应用Fluent软件建立数值波浪模型,并与理论值进行对比,验证模型的准确性。结合能量方程,得到不同前墙结构形式下波浪能转化与波浪无因次参数Kh之间的关系。数值模拟结果表明:前墙底端两侧增加半圆可以较好地提升转化效率,最大转化效率可达90%以上;相对于矩形前墙,平均能量转化效率的提升可达18%;在Kh较大的情况下,对前墙两侧增加半圆处理后,能量转化效率提升更为明显。研究成果可为振荡水柱前墙形状的优化设计提供参考。

Fluent software is used to establish the numerical wave model and compared with the theoretical value to verify the accuracy of the model.Combined with the energy equation,the relationship between wave energy transformation and wave dimensionless parameter Khin different front wall structures is obtained.The numerical simulation results show that increasing the semicircle on both sides of the bottom wall of the front wall can effectively enhance the conversion efficiency,and the maximum conversion efficiency can reach more than 90%.Compared with the rectangular front wall,the average energy conversion efficiency can be increased to 18%.In the case of larger Kh,the energy conversion efficiency increases more obviously when the semicircle on both sides of the front wall is treated.The research results can provide reference for the optimal design of the front wall shape of the oscillating water column（OWC）.