| Breakup Structure of Two-phase Jets with Various Momentum Flux from Porous Injector简 |
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| 引用本文： | Inchul Lee,Dohun Kim and Jaye Koo. Breakup Structure of Two-phase Jets with Various Momentum Flux from Porous Injector简[J]. 热科学学报(英文版), 2014, 23(1): 60-67. DOI: 10.1007/s11630-014-0677-7 |
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| 作者姓名： | Inchul Lee Dohun Kim and Jaye Koo |
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| 基金项目： | This work was supported by the National Research Foundation of Korea （NRF） grant funded by the Korean Government （MEST） （NRF-2011-0015435 and NRF- 2012M 1A3A3A02033146） |
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| 摘 要： | Spray structure and atomization characteristics were investigated through a comparison of a porous and a shear coaxial injector. The porous injector shows better atomization performance than the shear coaxial injector. To in- crease atomization performance and mixing efficiency of two-phase jets, a coaxial porous injector which can be applicable to liquid rocket combustors was designed and tested. The characteristics of atomization and spray from a porous and a shear coaxial injector were characterized by the momentum flux ratio. The breakup mechanism of the porous injector is governed by Taylor-Culick flow and axial shear forces. Momentum of injected gas flow through a porous material which is composed of sintered metal is radically transferred to the center of the liquid column, and then liquid column is effectively broken up. Although the shapes of spray from porous and shear co- axial jets were similar for various momentum ratio, spray structures such as spray angle and droplet sizes were different. As increasing the momentum flux ratio, SMD from the porous injector showed smaller value than the shear coaxial injector
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| 关 键 词： | 多孔材料 动量通量 两相射流 喷油器 结构 通量分裂 同轴射流 雾化特性 |
Breakup structure of two-phase jets with various momentum flux from a porous injector |
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| Inchul Lee,Dohun Kim,Jaye Koo. Breakup structure of two-phase jets with various momentum flux from a porous injector[J]. Journal of Thermal Science, 2014, 23(1): 60-67. DOI: 10.1007/s11630-014-0677-7 |
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| Authors: | Inchul Lee Dohun Kim Jaye Koo |
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| Affiliation: | 1. Graduate Student, Korea Aerospace University, Goyang, Republic of Korea
2. School of Aerospace and Mechanical Engineering, Korea Aerospace University, Goyang, Republic of Korea
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| Abstract: | Spray structure and atomization characteristics were investigated through a comparison of a porous and a shear coaxial injector. The porous injector shows better atomization performance than the shear coaxial injector. To increase atomization performance and mixing efficiency of two-phase jets, a coaxial porous injector which can be applicable to liquid rocket combustors was designed and tested. The characteristics of atomization and spray from a porous and a shear coaxial injector were characterized by the momentum flux ratio. The breakup mechanism of the porous injector is governed by Taylor-Culick flow and axial shear forces. Momentum of injected gas flow through a porous material which is composed of sintered metal is radically transferred to the center of the liquid column, and then liquid column is effectively broken up. Although the shapes of spray from porous and shear coaxial jets were similar for various momentum ratio, spray structures such as spray angle and droplet sizes were different. As increasing the momentum flux ratio, SMD from the porous injector showed smaller value than the shear coaxial injector |
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| Keywords: | Porous injector Shear coaxial injector Breakup mechanism Momentum flux ratio |
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