| Citation: | GAO Yuchao, CHU Wei, SU Lingyu, et al. Gas-centered swirl coaxial injectors spray with variable inner wall structures[J]. Journal of Aerospace Power, 2024, 39（5）：20220360 doi: 10.13224/j.cnki.jasp.20220360
|
The spray characteristics of gas-centered swirl coaxial injectors in three structures of the gas injector, namely, the smooth inner wall (A), inner wall with concave cavities (B), and inner wall with projections (C), were examined by experiments. At the same time, in order to analyze the change of flow field caused by the change of the inner wall structures of the gas injectors, the pure gas flow field was simulated without considering the liquid phase. The results demonstrated that the spray angles of the three injectors increased with the gas mass flow rate, but decreased with the liquid mass flow rate. Adding a concave cavity to the inner wall of gas injector had little effect on spray angle, breakup length and self-pulsation frequency of the injector. But inner wall with projections of gas injector had a significant effect on spray characteristics. Under the same working conditions, the inner wall with projections could enhance the ejection effect of the gas injector outlet, decrease the spray angle, and the stronger gas-liquid interaction could reduce the breakup length. When the self-pulsation occurred, the inner wall with projections also increased the frequency of self-pulsation. The self-pulsation frequency of the three injectors increased with gas mass flow rate, and the induction and maintenance mechanisms of the self-pulsation of the three injectors were analyzed. The effects of different concave cavity sizes and projection sizes on spray characteristics were investigated through experiments. For injector B, the spray angle, breakup length and self-pulsation of the spray were almost the same. The spray angle and breakup length of injector C were smaller than those of injector B, and decreased with the size of projection, while the self-pulsation frequency was larger than that of injector B, and increased with the size of projection.
| [1] |
刘阳阳,何国强,魏祥庚,等. 内直外旋气液同轴式喷嘴流量及雾化特性[J]. 推进技术,2016,37(7): 1280-1286. doi: 10.13675/j.cnki.tjjs.2016.07.011
LIU Yangyang,HE Guoqiang,WEI Xianggeng,et al. Flow rate and spray characteristics of gas centered swirl gas-liquid coaxial injector[J]. Journal of Propulsion Technology,2016,37(7): 1280-1286. (in Chinese) doi: 10.13675/j.cnki.tjjs.2016.07.011
|
| [2] |
杨立军, 富庆飞. 液体火箭发动机推力室设计[M]. 北京: 北京航空航天大学出版社, 2013.
|
| [3] |
SIVAKUMAR D,KULKARNI V. Regimes of spray formation in gas-centered swirl coaxial atomizers[J]. Experiments in Fluids,2011,51(3): 587-596. doi: 10.1007/s00348-011-1073-7
|
| [4] |
JEON J,HONG M,HAN Y M,et al. Experimental study on spray characteristics of gas-centered swirl coaxial injectors[J]. Journal of Fluids Engineering,2011,133(12): 121303.
|
| [5] |
KULKARNI V,SIVAKUMAR D,OOMMEN C,et al. Liquid sheet breakup in gas-centered swirl coaxial atomizers[J]. Journal of Fluids Engineering,2010,132(1): 011303.
|
| [6] |
SIDDHARTH K S,PANCHAGNULA M V,THARAKAN T J. Effect of gas swirl on the performance of a gas-centered swirl co-axial injector[J]. Atomization and Sprays,2017,27(8): 741-757. doi: 10.1615/AtomizSpr.2017019923
|
| [7] |
JOSEPH A, NANDAGOPALAN P, THARAKAN T J, et al. Effect of orifice recess on the droplet size distribution of sprays discharging from gas-centered swirl coaxial atomizers[M]//SAHA A, DAS D, SRIVASTAVA R, et al. Fluid mechanics and fluid power: contemporary research. New Delhi: Springer, 2017: 1091-1100.
|
| [8] |
KIM J G,HAN Y M,CHOI H S,et al. Study on spray patterns of gas-centered swirl coaxial (GCSC) injectors in high pressure conditions[J]. Aerospace Science and Technology,2013,27(1): 171-178. doi: 10.1016/j.ast.2012.08.004
|
| [9] |
张蒙正,李鳌,李进贤,等. 气/液同轴离心式喷嘴流量及雾化特性实验[J]. 推进技术,2004,25(1): 19-22. doi: 10.3321/j.issn:1001-4055.2004.01.006
ZHANG Mengzheng,LI Ao,LI Jinxian,et al. Experimental study on flow rate and spray characteristic of coaxial centrifugal injector[J]. Journal of Propulsion Technology,2004,25(1): 19-22. (in Chinese) doi: 10.3321/j.issn:1001-4055.2004.01.006
|
| [10] |
BAZAROV V G,YANG V. Liquid-propellant rocket engine injector dynamics[J]. Journal of Propulsion and Power,1998,14(5): 797-806. doi: 10.2514/2.5343
|
| [11] |
EBERHART C, LINEBERRY D, FREDERICK R. Propellant thrott-ling effects on self-pulsation of liquid rocket swirl-coaxial injection[R]. AIAA 2012-4204, 2012.
|
| [12] |
徐顺. 气体中心型气液同轴离心式喷嘴动态雾化特性研究[D]. 长沙: 国防科技大学, 2016.
XU Shun. Research on the dynamic spray characteristics of the gas-centered swirl coaxial injector[D]. Changsha: National University of Defense Technology, 2016. (in Chinese)
|
| [13] |
SAHOO S K,GADGIL H. Dynamics of self-pulsation in gas-centered swirl coaxial injector: an experimental study[J]. Journal of Propulsion and Power,2021,37(3): 450-462. doi: 10.2514/1.B38043
|
| [14] |
CANINO J V, HEISTER S D, GARRISON L A. Hydrodynamic modeling of oxidizer-rich staged combustion injector flow[C]// JANNAF (Joint Army Navy NASA Air Force) Joint Propulsion Meeting. Monterey, USA: ACM Press, 2004: 1-11.
|
| [15] |
ZHANG Liwei,WANG Xingjian,LI Yixing,et al. Supercritical fluid flow dynamics and mixing in gas-centered liquid-swirl coaxial injectors[J]. Physics of Fluids,2018,30(7): 1-16.
|
| [16] |
萨顿·比布拉兹. 火箭发动机基础[M]. 9版. 谢侃, 李世鹏, 李军伟, 等, 译. 北京: 北京理工大学出版社, 2019.
|
| [17] |
黄玉辉,周进,胡小平,等. 气液同轴式喷嘴自激振荡的试验现象和声学模型及对火箭发动机不稳定燃烧的影响[J]. 声学学报,1998,23(5): 459-465. doi: 10.15949/j.cnki.0371-0025.1998.05.011
HUANG Yuhui,ZHOU Jin,HU Xiaoping,et al. Experiment and acoustic model for the self-oscillation of coaxial swirl injector and its influence to combustion of liquid rocket engine[J]. Acta Acustica,1998,23(5): 459-465. (in Chinese) doi: 10.15949/j.cnki.0371-0025.1998.05.011
|
| [18] |
杨立军,富庆飞. 喷嘴对供应系统到燃烧室压力振荡传递幅频特性的影响[J]. 航空动力学报,2008,23(2): 305-310. doi: 10.13224/j.cnki.jasp.2008.02.027
YANG Lijun,FU Qingfei. Effect of injector on pressure oscillation amplitude-frequency characteristics from pipeline to combustion chamber[J]. Journal of Aerospace Power,2008,23(2): 305-310. (in Chinese) doi: 10.13224/j.cnki.jasp.2008.02.027
|
| [19] |
杨立军,富庆飞. 由喷嘴连接的燃烧室到供应系统压力振荡传递过程研究[J]. 航空动力学报,2009,24(5): 1182-1186. doi: 10.13224/j.cnki.jasp.2009.05.035
YANG Lijun,FU Qingfei. Investigation on pressure oscillation propagation from combustion chamber to pipeline through injector[J]. Journal of Aerospace Power,2009,24(5): 1182-1186. (in Chinese) doi: 10.13224/j.cnki.jasp.2009.05.035
|
| [20] |
ARTHUR D, VASSILVITSKII S. k-means++: the advantages of careful seeding[C]// Proceedings of the Eighteenth Annual ACM-SIAM Symposium on Discrete Algorithms, SODA 2007. New Orleans, USA: ACM Press, 2007: 1-11.
|
| [21] |
PARK G,LEE J,OH S,et al. Characteristics of gas-centered swirl coaxial injector with acoustic excitation of gas flow[J]. AIAA Journal,2017,55(3): 894-901. doi: 10.2514/1.J055126
|
| [22] |
张新桥. 基于离心式喷嘴的多组分燃料喷雾燃烧过程研究[D]. 长沙: 国防科技大学, 2016.
ZHANG Xinqiao. Research on spray combustion of multi-component fuel based on swirl injector[D]. Changsha: National University of Defense Technology, 2016. (in Chinese)
|
| [23] |
STRAKEY P A, COHN R K, TALLEY D G. The development of a methodology to scale between cold-flow and hot-fire evaluations of gas-centered swirl coaxial injectors[R]. Las Vegas, USA: 52nd JA-NNAF Propulsion Meeting, 2004.
|
| [24] |
SAHOO S K,GADGIL H. Large scale unsteadiness during self-pulsation regime in a swirl coaxial injector and its influence on the downstream spray statistics[J]. International Journal of Multiphase Flow,2022,149: 103944. doi: 10.1016/j.ijmultiphaseflow.2021.103944
|
| [25] |
RAJAMANICKAM K,BASU S. Insights into the dynamics of spray-swirl interactions[J]. Journal of Fluid Mechanics,2017,810: 82-126. doi: 10.1017/jfm.2016.710
|
| [26] |
CHARALAMPOUS G,HARDALUPAS Y. Application of proper orthogonal decomposition to the morphological analysis of confined co-axial jets of immiscible liquids with comparable densities[J]. Physics of Fluids,2014,26(11): 113301. doi: 10.1063/1.4900944
|
| [27] |
KUMAR A,SAHU S. Large scale instabilities in coaxial air-water jets with annular air swirl[J]. Physics of Fluids,2019,31(12): 124103. doi: 10.1063/1.5122273
|
| [28] |
ARIENTI M,SOTERIOU M C. Time-resolved proper orthogonal decomposition of liquid jet dynamics[J]. Physics of Fluids,2009,21(11): 112104. doi: 10.1063/1.3263165
|
| [29] |
CHARALAMPOUS G,HADJIYIANNIS C,HARDALUPAS Y. Proper orthogonal decomposition of primary breakup and spray in co-axial airblast atomizers[J]. Physics of Fluids,2019,31(4): 043304. doi: 10.1063/1.5085416
|
| [30] |
康忠涛. 气液同轴离心式喷嘴非定常雾化机理和燃烧特性研究[D]. 长沙: 国防科技大学, 2016.
KANG Zhongtao. The unsteady atomization mechanism and combustion characteristics of gas-liquid swirl coaxial injector[D]. Changsha: National University of Defense Technology, 2016. (in Chinese)
|
DownLoad:
