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Theoretical Model of Coaxial Twin-Fluid Spray In a Liquid Rocket Combustor  

조용호 (현대모비스)
윤웅섭 (연세대학교 기계공학과)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.6, no.2, 2002 , pp. 37-44 More about this Journal
Abstract
A theoretical study of spray and combustion characteristics due to coaxial twin-fluid injection is conducted to investigate the effects of liquid jet property, droplet size, contact length and liquid jet velocity. Model is properly validated with measurements and shows good agreement. Prediction of jet contact length, droplet size, liquid jet velocity reflects genuine features of coaxial injection in physical and practical aspects. Both the jet contact length and tile droplet size are reduced in a linear manner with an increase of injector diameter. Cross sectional area of liquid intact core is reduced with augmented jet splitting rate, thus the jet is accelerated to maintain the mass continuity and with an assistant of momentum diffusion by burnt gas.
Keywords
Coaxial Twin-Fluid Injection; Jet Contact Length; Liquid Jet Velocity; Drop Size;
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  • Reference
1 A. Crespo, A. Linan, 'Unsteady Effects in Droplet Evaporation and Combustion', Combustion Science and Technology, Vol.11, pp9-18, 1975   DOI   ScienceOn
2 Reitz R.D and Bracco F.V, 'Mechanism of Breakup of Round Liquid Jets,' In Encyclopedia of Fluid Mechanics, Gulf Pub, Houston, TX, pp 233-249, 1986
3 Chigier, N and Eroglu, H,,'Atomization of Liquid Jets from Injection Elements in Liquid Rocket Combustion Chamber,' Carnegie mellon Univ. NASA Report, MSFC, Grant NAG8-126, Sep. 1990
4 R.D Sutton, M.D Schuman, W.D Chadwick, 'Operating Manual for Coaxial Injection Combustion Model', 1974
5 P.Y Liang, R.J. Jensen and Y. M. Chang, 'Numerical Analysis of SSME PreburnerInjector Atomization and Combustion Process,', AIAA Paper 86-0454, 24th Aerospace Sciences Meeting, January 6-9, Reno, Nevada, 1986
6 M.G.Giridharan, J.G. Lee, A. Krishnan, A.J. Przekwas 'A Numerical Model For Coupling Between Atomiztion And Spray Dynamics In Liquid Rocket Thrust Chamber', AIAA, 1992
7 G.M. Feath 'Current Status of Droplet and Liquid Combustion', Combust Sci. Vol 3. pp 191-224, 1977   DOI   ScienceOn
8 R.D. Reitz and R.Diwakar 'Effect of Drop Breakup on Fuel Sprays', SAE Paper 860469, February 24-28, 1986
9 M.C. Yeon and L.W. Chen, 'On Drag of Evaporation Liquid Droplets', Combustion Science and Technology, Vol.14, pp147-154, 1976   DOI   ScienceOn
10 J.C.Lasheras, E. Villermaux and E.J. Hoppinger, 'Breakup and Atomization of a Round Water Jet by a High-Speed Annular Air Jet', Fluid Mech, vol 357, pp351-379, 1998   DOI   ScienceOn
11 S.P Lin, 'Regimes of Jet Breakup and Breakup Mechanisms (Mathematical Aspects)', Clarkson University, Potsdam
12 A. Prezkwas, S. Chuech and A. K. Singhal, 'Numerical Modeling for Primary Atomization of Liquid Jets,' AIAA Paper 89-0163, 27th Aerospace ciences Meeting, January 9-12, 1989, Reno, Nevada 1989
13 R.D Sutton, 'Spay Cmbustion Processes in Seady and Non-Seady Flow system,' Ph.D. Thesis, Department of Mchanical Engineering, University of California, Berkeley, California, September 1971
14 Donald J. Hautman, 'Spray Characteristics of Liquid/Gas Coaxial Injections with The Center Liquid Swirled', Atomization and Spray, vol.3, pp, 373-387, 1993   DOI
15 Alex B. Liu, Daniel Mather, and Rolf D. Reitz 'Modeling the Effects of Drop Drag and Breakup on Fuel Sprays', SAE Paper 930072, March 1-5, 1993