Abstract
In this study, the effects of environment conditions on decane were investigated. Decane was injected in subcritical and supercritical ambient conditions. The visualization chamber was pressurized to 1.68 MPa by using nitrogen gas at a temperature of 653 K for subcritical ambient conditions. For supercritical ambient conditions, the visualization chamber was pressurized to 2.52 MPa by using helium at a temperature of 653 K. The decane injection in the pressurized chamber was visualized via a shadowgraph technique and gradient images were obtained by a post processing method. A large variation in density gradient was observed at jet interface in the case of subcritical injection in subcritical ambient conditions. Conversely, for supercritical injection in supercritical ambient conditions, a small density gradient was observed at the jet interface. In a manner similar to that observed in other cases, supercritical injection in subcritical ambient conditions differed from supercritical ambient conditions such as sphere shape liquid. Additionally, there were changes in the interface, and the supercritical injection core width was thicker than that in the subcritical injection. Furthermore, in cases with the same injection conditions, the change in the supercritical ambient normalized core width was smaller than the change in the subcritical ambient normalized core width owing to high specific heat at the supercritical injection and small phase change at the interface. Therefore, the interface was affected by the changing ambient condition. Given that the effect of changing the thermodynamic properties of propellants could be essential for a variable thrust rocket engine, the effects of the ambient conditions were investigated experimentally.
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References
F. Q. Zhong, X. J. Fan, J. Wang, and J. G. Yu, Characteristics of Compressible Flow of Supercritical Kerosene, Acta Mechanica Sinica, vol. 28, No. 1, pp.8–13, 2012.
X. Petit, G. Ribert, G. Lartigue, and P. Domingo, Large Eddy Simulation of Supercritical Fluid Injection, The Journal of Supercritical Fluids, vol. 84, pp.61–73, 2013.
C. Segal and S. A. Polikhov, Subcritical to Supercritical mixing, Physics of Fluids, Vol. 20, No. 5, 2008.
N. Zong, H. Meng, S. Y. Hsieh, and V. Yang, A Numerical Study of Cryogenic Fluid Injection and Mixing under Supercritical Conditions, Physics of Fluid Vol. 16, No. 12, 2004.
W. O. Mayer and Axel H. A, Schik, Atomization and Breakup of Cryogenic Propellants under High-Pressure Subcritical and Supercritical Conditions, Journal of Propulsion and Power, vol. 14, No. 5, pp.835–842, 1998.
R. Branam and W. Mayer, Characterization of Cryogenic Injection at Supercritical Pressure, Journal of Propulsion and Power, vol. 19, No. 3, pp.342–355, 2003.
M. Oschwald, J. J. Smith, R. Branam, J. Hussong, and A. Schik, Injection of Fluids into Supercritical Environments, Combustion Science and Technology, Vol. 178, No. 1-3, pp.49–100, 2006.
A. Roy, C. Joly, and C. Segal, Disintegrating Supercritical Jets in a Subcritical Environment, Journal of Fluid Mechanics, vol. 717, pp.193–202, 2013.
F. Q. Zhong, X. J. Fan, J. Wang, J. Yu, and J. G. Wang, Heat Transfer of Aviation Kerosene at Supercritical Conditions, Journal of Thermophysics and Heat Transfer, vol. 23, No. 3, pp.543–550, 2009.
NIST chemistry webbook, http:// webbook.nist.gov
N. Wang, J. Zhou, Y. Pan, and H. Wang, Experimental Investigation on Flow Patterns of RP-3 Kerosene under Sub-critical and Supercritical Pressures, Acta Astronautica, vol. 94, No. 2, pp.834–842, 2013.
K. S. Agrawal, Breakup of Liquid Jets, International Journal of Emerging Technologies in Computational and Applied Sciences, vol. 13, pp.487–496, 2013.
R. H. Rangel and W. A. Sirignano, Nonlinear Growth of Kelvin-Helmholtz Instability: Effect of Surface Tension and Density Ratio, Physics of Fluids, Vol. 31, No. 7, 1988.
R. Zhang, X. He, G. Doolen, and S. Chen, Surface Tension Effects on Two-Dimensional Two-Phase Kelvin- Helmholtz Instabilities, Advances in Water Resources, Vol. 24, No. 3-4, pp.461–478, 2001.
Acknowledgement
This work was supported by Advanced Research Center Program (NRF-2013R1A5A1073861) and Basic Science Research Program (2016R1D1A1B04934852) through the National Research Foundation of Korea (NRF) grant funded by the Korean government.
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This work was supported by Advanced Research Center Program (NRF-2013R1A5A1073861) and Basic Science Research Program (2016R1D1A1B04934852) through the National Research Foundation of Korea(NRF) grant funded by the Korea government.
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Shin, B., Kim, D., Son, M. et al. Effects of supercritical environment on hydrocarbon-fuel injection. J. Therm. Sci. 26, 183–191 (2017). https://doi.org/10.1007/s11630-017-0928-5
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DOI: https://doi.org/10.1007/s11630-017-0928-5