Flow-blurring atomization is an innovative twin-fluid atomization approach that has demonstrated superior effectiveness in producing fine sprays compared to traditional airblast atomization methods. In flow-blurring atomizers, the high-speed gas flow is directed perpendicular to the liquid jet. Under specific geometric and physical conditions, the gas penetrates back into the liquid nozzle, resulting in a highly unsteady bubbly two-phase mixing zone. Despite the remarkable atomization performance of flow-blurring atomizers, the underlying dynamics of the two-phase flows and breakup mechanisms within the liquid nozzle remain poorly understood, primarily due to the challenges in experimental measurements of flow details. In this study, detailed interface-resolved numerical simulations are conducted to investigate the two-phase flows generated by a planar flow-blurring atomizer. By varying key dimensionless parameters, including the dynamic-pressure ratio, density ratio, and Weber number, over wide ranges, we aim to comprehensively characterize their effects on the two-phase flow regimes and breakup dynamics.

中文翻译：

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平面流模糊雾化器内两相流的详细数值研究

流动模糊雾化是一种创新的双流体雾化方法，与传统的鼓风雾化方法相比，它在产生精细喷雾方面表现出卓越的有效性。在流动模糊雾化器中，高速气流垂直于液体射流。在特定的几何和物理条件下，气体渗透回液体喷嘴，形成高度不稳定的气泡两相混合区。尽管流动模糊雾化器具有出色的雾化性能，但液体喷嘴内两相流的基本动力学和破碎机制仍然知之甚少，这主要是由于流动细节实验测量的挑战。在这项研究中，进行了详细的界面解析数值模拟，以研究平面流模糊雾化器产生的两相流。通过在大范围内改变关键的无量纲参数，包括动压比、密度比和韦伯数，我们的目标是全面表征它们对两相流态和破碎动力学的影响。