Atomization patterns and breakup characteristics of liquid sheets formed by two impinging jets

Dong Jun Ma, Xiao Dong Chen, Prashant Khare, Vigor Yang

研究成果: Paper同行評審

40 引文 斯高帕斯(Scopus)

摘要

High fidelity numerical simulations have been performed to study the atomization patterns and breakup characteristics of liquid sheets formed by two impinging jets. A fully three-dimensional Volume-of-Fluid method with adaptive mesh refinement (AMR) based on octree meshes is used to simulate the primary atomization. The oblique collision of two cylindrical laminar jets leads to the liquid flowing outward from the impact point, creating a thin sheet which lies in a plane perpendicular to the plane containing the two jets and disintegrates into ligaments or droplets. The breakup of the sheet is dominant by the viscosity and surface tension effects (Reynolds and Webber number). The impinging water jets are investigated and different flow patterns, such as closed rim, open rim, rimless and ligament, are studied. The circumferentially space drops were shed from the periphery of the sheet, as well as the ligaments were fragmented from the leading edge of the sheet and then broke into droplets following the Rayleigh mechanism. The periodic waves from the point of impingement were apparent on the surface of the sheet. The impact waves caused early breakdown of the sheet downstream of the impingement point, whereas waves amplied by aerodynamic stresses controlled the breakdown of the rest of the sheet and the ligaments. The impinging jets for non-Newtonian uid are also investigated, two different flow patterns are observed.

原文English
出版狀態Published - 2011
事件49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition - Orlando, FL, United States
持續時間: 2011 一月 42011 一月 7

Conference

Conference49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
國家/地區United States
城市Orlando, FL
期間11-01-0411-01-07

All Science Journal Classification (ASJC) codes

  • 航空工程

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