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Atomization and Sprays

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ISSN Print: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2017020941
pages 1025-1040

A PARAMETRICAL STUDY OF THE BREAKUP AND ATOMIZATION PROCESS OF TWO IMPINGING LIQUID JETS

Can Ruan
School of Aerospace Engineering, Xiamen University, Xiamen, Fujian, People's Republic of China, 361005; Key Laboratory for Power Machinery and Engineering of M.O.E., Shanghai Jiao Tong University, Shanghai, People's Republic of China, 200240
Fei Xing
School of Aerospace Engineering, Xiamen University, Xiamen, Fujian, People's Republic of China, 361005
Yue Huang
School of Aerospace Engineering, Xiamen University, Xiamen, Fujian, People's Republic of China, 361005
Leilei Xu
Key Laboratory for Power Machinery and Engineering of M.O.E., Shanghai Jiao Tong University, Shanghai, People's Republic of China, 200240
Xingcai Lu
Key Laboratory for Power Machinery and Engineering of M.O.E., Shanghai Jiao Tong University, Shanghai, People's Republic of China, 200240

ABSTRACT

The breakup and atomization characteristics of two impinging liquid jets under various operating conditions were numerically investigated with tree-based adaptive mesh refinement (AMR) and volume of fluid (VOF) methods. Jet velocity, impingement angle, and jet momentum ratio were varied to provide a wide range of jet operating conditions. Results indicate that the overall spray patterns vary dramatically with the change of jet velocity. The impingement angle has a great influence on the instability characteristics of the impact wave, and there exists an excessive impingement angle which may lead to the backflow of the liquid fuel, thus causing serious wall ablation when an impinging-type injector is used in liquid rocket engine combustors. Furthermore, the liquid sheet deviates from the symmetry axis when the velocities of the two jets are not the same, leading to a bow-shaped liquid sheet.