论文部分内容阅读
该文采用推板式造波机和改进的Goring造波方法在波浪水槽中生成了由三个等波高孤立波组成的波列,首先在坡度为1/10的斜坡上进行了多个孤立波连续爬高的实验研究。实验测量了等波高双孤立波和三孤立波在等水深波浪水槽中传播和在斜坡上的爬高过程,给出了沿程多点浪高仪测量的波面时间序列和高速摄像记录的水线在斜坡上爬高与回落过程影像。分析了来波相对波高和无量纲波峰间距对每个孤立波爬高放大系数的影响。在基于RANS方程和VOF方法的数值波浪水槽中,模拟了三孤立波爬高过程,给出了最大爬高与破碎特征。实验和数值模拟结果表明,孤立波在斜坡上回落时会产生强劲的回流水流,该反向流动导致后随孤立波破碎,消耗波动能量,使得后随孤立波的爬高放大系数明显小于没有回落水流影响的首个孤立波的爬高放大系数。当孤立的波峰间较大时,若来波相对波高较小,后两个的孤立波爬高基本相同;若来波相对波高较大时,第三个孤立波的爬高大于第二个孤立波的爬高。
In this paper, a wave plate consisting of three equi-high isolated waves is generated in a wave flume by means of a push-plate wave generator and an improved Goring wave-making method. Firstly, multiple solitary waves are continuously carried out on a slope of 1/10 Experimental study of climbing. Experiments were carried out to measure the propagation and the climbing process of the isopipe high double solitary waves and the three solitary waves in the watertight flume with equal depth. The wavefront time series and the high-speed camera recording waterline Climb the high and fall process images on the slopes. The influence of relative wave height and dimensionless peak spacing on the amplification factor of each solitary wave is analyzed. In the numerical wave tank based on RANS equation and VOF method, the three-solitary wave climbing process is simulated and the maximum climbing and crushing characteristics are given. Experiments and numerical simulations show that the solitary wave will produce a strong backflow when falling on the slope, and this backward flow causes the wave following the solitary wave to dissipate the fluctuating energy, so that the amplification amplification coefficient of the following solitary wave is significantly smaller than that of the no-wave The first isolated wave affected by water flow climbs up the amplification factor. When the isolated peaks are relatively large, the relative amplitudes of the incoming waves are smaller and the later two isolated ones are almost the same. If the relative wave height of the incoming waves is relatively large, the climb of the third isolated wave is greater than that of the second isolated wave Wave climbing.