Rogue wave events (RWEs), rare uncertainly emerging localized events with extreme amplitudes, widely exist in various nonlinear wave media. Past laboratory studies on RWEs of water surface waves have mainly focused on mechanically excited waves but to a lesser extent on waves solely excited by wind, which also have a large number of degrees of freedom. In this work, we experimentally demonstrate the laboratory observation of RWEs in a wind-driven water surface wave system after the transition to the steady wave turbulent state by increasing averaged wind speed. The spatiotemporal water surface height evolution is measured using diffusive light photography. It is found that RWEs uncertainly emerge in traveling bursts with high frequency large-amplitude fluctuations and irregular burst amplitude. The associated spontaneous slow periodic wave is identified as the resonant slow sloshing wave selected by the water tank with a finite length and spontaneously excited under turbulence. The surface wind speed modulation by the oscillating surface height of the sloshing wave in the small fetch region is proposed as the source for the excitations of sequential large amplitude bursts. The burst envelope shape deterioration through further turbulent wind and water wave interactions as bursts propagate downstream causes the non-Gaussian water surface height histogram with a highly stretched tail, contributed by the uncertain generation of RWEs in irregular bursts in the middle fetch region.

中文翻译：

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在风驱动的水波湍流中自发地激发出与缓慢振荡的共振波相关的无赖波

流浪事件（RWE）是罕见的，不确定的，出现极端振幅的局部事件，广泛存在于各种非线性波介质中。过去对水面波的RWE进行的实验室研究主要集中在机械激发波上，而在较小程度上研究了仅由风激发的波，这些波也具有很大的自由度。在这项工作中，我们通过增加平均风速，通过实验证明了风能水面波系统中的RWE在过渡到稳态波湍流状态后的实验室观察。使用漫射光照相法测量时空水表面高度的演变。发现在高频大振幅起伏和突发振幅不规则的行进突发中不确定地出现RWE。相关的自发慢周期波被识别为由水箱选择的共振慢晃动波，其具有有限的长度并且在湍流下自发地激发。提出了通过小获取区域中的晃动波的振荡表面高度对表面风速进行调制的方法，作为连续大振幅脉冲串激励的来源。突发向下游传播时，由于进一步的湍流风和水波相互作用，突发包络形状变差，导致非高斯水面高度直方图具有高度拉伸的尾部，这是由于在中间获取区域中不规则突发中产生的RWE的不确定性造成的。提出了通过小获取区域中的晃动波的振荡表面高度对表面风速进行调制的方法，作为连续大振幅脉冲串激励的来源。突发向下游传播时，由于进一步的湍流风和水波相互作用，突发包络形状变差，导致非高斯水面高度直方图具有高度拉伸的尾部，这是由于在中间获取区域中不规则突发中产生的RWE的不确定性造成的。提出了通过小获取区域中的晃动波的振荡表面高度对表面风速进行调制的方法，作为连续大振幅脉冲串激励的来源。突发向下游传播时，由于进一步的湍流风和水波相互作用，突发包络形状变差，导致非高斯水面高度直方图具有高度拉伸的尾巴，这是由于在中间获取区域中不规则突发中产生的RWE的不确定性造成的。