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http://dx.doi.org/10.3744/JNAOE.2011.3.4.286

Study on self-pulsation characteristics of gas centered shear coaxial injector for supercavitating underwater propulsion system  

Yoon, Jung-Soo (School of Mechanical and Aerospace Engineering, Seoul National University)
Chung, Jae-Mook (School of Mechanical and Aerospace Engineering, Seoul National University)
Yoon, Young-Bin (School of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.3, no.4, 2011 , pp. 286-292 More about this Journal
Abstract
In order to design a shear coaxial injector of solid particles for underwater propulsion system, basic experiments on gas-liquid shear coaxial injector are necessary. In the gas-liquid coaxial injector self-pulsation usually occurs with an intense scream. When self-pulsation occurs, mass flow rate oscillation and intense scream are detected by the interactions between the liquid and gas phase. Self-pulsation must be suppressed since this oscillation may cause combustion instabilities. Considerable research has been conducted on self-pulsation characteristics, but these researches are conducted in swirl coaxial injector. The main objective of this research is to understand the characteristics of self-pulsation in shear coaxial injector and reveal the mechanism of the phenomenon. Toward this object, self-pulsation frequency and spray patterns are measured by laser diagnostics and indirect photography. The self-pulsation characteristics of shear coaxial injector are studied with various injection conditions, such as the pressure drop of liquid and gas phase, and recess ratio. It was found that the frequency of the self-pulsation is proportional to the liquid and gas Reynolds number, and proportional to the L/d.
Keywords
Self-pulsation; Shear coaxial injector; Recess ratio; Momentum flux ratio;
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1 Rehab, H. Willermaux, E. and Hopfinger, E.J. 1997. Flow regimes of large-velocity ratio coaxial jets. J. Fluid Mech., 345, pp. pp.357-381.   DOI   ScienceOn
2 Im, J.H. Kim, D. Han, P. Yoon,Y. and Bazarov, V., 2009, Self-pulsation characteristics of a gas-liquid swirl coaxial injector. Atomization and Sprays, 19(1), pp. 57-74   DOI
3 Foot, J.P. Lineberry, J.T. Thompson, B.R. and Winkelman, B.C., 1996. Investigation of aluminum particle combustion for underwater propulstion applications. AIAA Journal, 1996-3086.
4 Bayvel, L. and Orzechowski, Z., 1993. Liquid Atomization, Taylor and Francis, New York.
5 Camatte, P. Care,I. Dumouchel, C. and Ledoux, M., 1993. Modelisation of pulverisation systems: some aspects of linear stability analysis. In: Gouesbet G, Berlemont A (eds) Instabilities in multiphase flows, Plenum Press, New York.
6 Lee, J.G. Chen, L.D., 1991. Linear stability analysis of gasliquid interface. AIAA Journal, 29,1589-1595.   DOI
7 Lefevbre, A.W., 1989. Atomization and Sprays. Hemisphere Publishing Corp., New York.
8 Bazarov, V.G. and Lul'ka, L.A., 1978. Self-pulsation of liquid flow in coaxial air stream. Soviet Aeronautics, vol. 3, Pergamon, New York, pp. 14-18.
9 Bazarov, V.G. and Yang, V., 1998. Liquid-propellant rocket engine injector dynamics, J. Propul. Power, 14, pp. 797-806.   DOI   ScienceOn
10 Bazarov, V.G., 1995. Self-pulsation in coaxial injectors with central swirl liquid stage. AIAA 1995-2358, 31st AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, San Diego, CA. July 10-12, 1995.
11 Zhou, J. Hu, X. Huang, Y. and Wang, Z., 1996. Flow rate and acoustic characteristics of coaxial swirling injector of hydrogen/oxygen rocket engine. AIAA 1996-3135, 32nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, Florida. July 1-3, 1996.
12 Kendall, J.M. 1986. Experiments on annular liquid jet instability and on the formation of liquid shells. Phys. Fluids, 29(7), pp. 2086-2094.   DOI
13 Carvalho, I.S. and Heitor, M.V., 1998. Liquid film break-up in a model of a prefilming airblast nozzle, Exp Fluids, 24, pp. 408-415.   DOI
14 Wahono, S. Honnery, D. Soria, J. Ghojel, J., 2008. High-speed visualization of primary break-up of annular liquid sheets. Exp Fluids, 44, pp. 451-459.   DOI
15 Mayer, W. and Tamura, H., 1996. Propellant injection in a liquid oxygen/gaseous hydrogen rocket engine. J. Propul. Power, 12, pp. 1137-1147.   DOI