High-fidelity numercial simulations of impinging jet atomization

Xiaodong Chen, Dongjun Ma, Vigor Yang

研究成果: Conference contribution

2 引文 斯高帕斯(Scopus)

摘要

High fidelity numerical simulations are performed to study the atomization process of impinging jets over a broad range of operating conditions. An improved volume-of-fluid (VOF) method augmented with adaptive mesh refinement (AMR) is used to simulate the formation and breakup of the liquid sheet formed by two impinging jets. In addition, a thickness-based refinement method is developed and implemented to automatically and efficiently resolve the drastic changing of requested grid resolution. The behaviors in various Reynolds and Weber number regimes are studied systemically. The predicted liquid sheet topology, atomization, and droplet size distribution agree well with experimental measurements. Several different patterns of sheet and rim configurations are obtained, including liquid chain, closed rim, fish-bone, disintegrating sheet, disintegrating rim and impact wave. The instability mechanisms of sheets and rims are studied based on the concepts of absolute and convective instabilities. New knowledge is acquired about the onset of sheet and rim instabilities. This locking-on feature of Strouhal number of impact wave is found based on the previous detailed study. Finally, schematic diagrams of all kinds of instabilities happens in impinging jet atomization are obtained.

原文English
主出版物標題48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012
發行者American Institute of Aeronautics and Astronautics Inc.
ISBN(列印)9781600869358
DOIs
出版狀態Published - 2012
事件48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012 - Atlanta, GA, United States
持續時間: 2012 7月 302012 8月 1

出版系列

名字48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012

Other

Other48th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2012
國家/地區United States
城市Atlanta, GA
期間12-07-3012-08-01

All Science Journal Classification (ASJC) codes

  • 能源工程與電力技術
  • 航空工程
  • 控制與系統工程
  • 電氣與電子工程
  • 機械工業

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