Surface wave breaking induces strong turbulence in the two-phase flow region. Detailed turbulence statistics were experimentally obtained using non-intrusive optical techniques in a breaking bore roller, at relatively large scale, with a bore Froude number Fr₁ = 2.15 and Reynolds number Re = 2.3 × 10⁵. These novel velocity data were ensemble-averaged based upon an instantaneous dataset of 24,320 images. In terms of the velocity field, the breaking bore roller was classified into three regions: the impinging jet, developing shear layer and flow reversal region. The vertical profiles of the longitudinal velocity data exhibited some self-similarity. The Reynolds stress data showed an anisotropic turbulent flow immediately downstream of the roller toe, and tended towards isotropy away from the roller toe. The vorticity data suggested that the breaking at the roller toe was responsible for the generation of vortices. The turbulent structures in the shear layer presented significantly smaller length and time scales with higher dissipation rate than other regions. A discussion between present turbulence statistical data and bubble dynamics from literature was developed. The comparison between present and past studies suggested a similarity in two-phase physical processes in the breaking roller region between the tidal bore, hydraulic jump, swash zone bore and breaking wave.

表面波破碎在两相流区域引起强烈的湍流。详细的湍流统计数据是使用非侵入式光学技术在破碎孔滚子中以相对较大的比例通过实验获得的，孔弗劳德数Fr ₁  = 2.15 和雷诺数 Re = 2.3 × 10 ⁵. 这些新的速度数据基于 24,320 张图像的瞬时数据集进行了整体平均。在速度场方面，破碎孔辊分为三个区域：撞击射流、发展剪切层和流动反转区域。纵向速度数据的垂直剖面表现出一些自相似性。雷诺应力数据显示紧靠滚轮趾下游的各向异性湍流，并趋向于远离滚轮趾的各向同性。涡度数据表明辊趾处的断裂是涡流产生的原因。剪切层中湍流结构的长度和时间尺度明显小于其他区域，耗散率更高。对现有湍流统计数据和文献中的气泡动力学进行了讨论。当前和过去的研究之间的比较表明，潮汐孔、水跃、斜带孔和破碎波之间的破碎辊区域的两相物理过程具有相似性。