“厂”形板式防波堤消波性能数值模拟

Numerical simulation for wave dissipation mechanism of ‘厂’-type breakwater

根据水平板形防波堤和倾斜板形防波堤的特点,提出一种“厂”形组合板式防波堤,通过数值模拟方法对防波堤的消波性能进行研究。首先,利用FLUENT软件建立二维规则波数值波浪水槽,并验证水槽应用的有效性。通过模拟得到堤后波高-时间过程线,分析防波堤的透射系数,探讨透射系数随波高、周期、开孔率、相对板宽、波陡、倾斜板与水平板角度、超高等参数的变化关系。结果表明,在模拟范围内防波堤透射系数较小,消波性能优良,特别是对长周期波也有较好的消波效果。研究成果可以为新型防波堤设计提供参考。

According to the horizontal plate-type breakwater and inclined plate-type breakwater, we propose a "厂"-type breakwater and study the wave dissipation performance of it by numerical simulation method. At first,we establish the two-dimensional regular wave numerical model based on the software FLUENT,and verify the effectiveness of the water tank. Then,we obtain the variation of wave height behind the breakwater-time relationship through simulation,analyze the transmission coefficient,and discuss the relationship between the transmission coefficient of new breakwater and the wave height,wave period,opening rate of the breakwater,relatively plate width,wave steepness,angle between inclined plate and horizontal plate and the distance from still water level to the structure top. The results show that within the simulation scope,the breakwater has a transmission coefficient and wave absorption performance,especially for the long-period wave. The research result may serve as reference for the design of new-type breakwater.