A detailed numerical investigation of two-phase flows inside a planar flow-blurring atomizer

IF 1 4区工程技术 Q4 ENGINEERING, CHEMICAL

Atomization and Sprays Pub Date : 2023-01-01 DOI:10.1615/atomizspr.2023049089

Yue Ling, Luling Jiang

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引用次数: 0

Abstract

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.

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平面流动模糊雾化器内两相流动的详细数值研究

流动模糊雾化是一种创新的双流体雾化方法，与传统的空气雾化方法相比，它在产生精细喷雾方面具有优越的效果。在流动模糊雾化器中，高速气流垂直于液体射流方向。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，但由于流动细节的实验测量存在挑战，人们对液体喷嘴内两相流动的潜在动力学和破裂机制仍然知之甚少。在本研究中，对平面流动模糊雾化器产生的两相流进行了详细的界面解析数值模拟。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流态和破碎动力学的影响。

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来源期刊

Atomization and Sprays 工程技术-材料科学：综合

CiteScore

2.10

自引率

16.70%

发文量

审稿时长

1.7 months

期刊介绍： The application and utilization of sprays is not new, and in modern society, it is extensive enough that almost every industry and household uses some form of sprays. What is new is an increasing scientific interest in atomization - the need to understand the physical structure of liquids under conditions of higher shear rates and interaction with gaseous flow. This need is being met with the publication of Atomization and Sprays, an authoritative, international journal presenting high quality research, applications, and review papers.