Abstract
This paper presents twin spray characteristics of two impinging F-O-O-F type injectors in which fuel and oxidizer impinge on each other to atomize under the various conditions. The droplet size and velocity in the impinging spray flow field were measured using PDPA. The droplet size and velocity were investigated at the mixture ratios of 1.5, 2.0, 2.47 and 3.0 for four injectors in which two single F-O-O-F injectors were arranged at the intervals of 20.8, 31.2, 41.6 and 62.4mm respectively. In general, the arithmetic mean diameter, SMD and standard deviation of droplet size in the interaction area (X=0 andY=0mm) were smaller, while the axial velocity in the interaction area was slightly higher. An empirical correlation is obtained for the (D 10) D /(D 10) C value under the assumptions of two identical droplets and these with different size and velocity. The droplets with low Weber numbers below 40 have possibility to coalesce, while those over 40 tend to disintegrate after impingement in the interaction area.
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Abbreviations
- L:
-
Interval length between injectors [mm]
- r:
-
Mixture ratio
- m :
-
Mass flow rate [g/s]
- D10 :
-
Arithmetic mean diameter [μm]
- D32 :
-
Sauter mean diameter [μm]
- Dsdev :
-
Standard deviation of droplets [μm]
- U:
-
Axial velocity [m/s]
- We:
-
Weber number
- f:
-
Fuel
- D:
-
Centerline of interaction area
- o:
-
Oxidizer
References
Arkhipov, V. A., Bushlanov, V. P., Vasenin, I. M., Rusakov, V. V. and Trokhimov, V. F., 1982, “Equilibrium Forms and Stability of Rotating Drops,”Mekh. Zhidkosti I gaza, No. 4.
Kang, S. J., Rho, B. J., Oh, J. H. and Kwon, K. C., 2000, “Atomization Characteristics of a Double Impinging F-O-O-F type Injector with Four Streams for Liquid Rocket,”KSME International Journal, Vol. 14, No. 4, pp. 466–476.
Kang, S. J., Ryu, K. W., Kwon, K. C. and Song, B. K., 2001, “An Experimental Study on Turbulent Characteristics of an Impinging Split-Triplet Injector,”KSME International Journal, Vol. 15, No. 1, pp. 117–124.
Kuykendal, W. B., 1970, “The Effects of Injector Design Variables on Average Drop Size for Impinging Jets,” AFRPL-TR-70-53.
Park, S. Y., Kim, S. J., Park, S. U. and Kim, Y., 1996, “A Study on Atomization Characteristics of an Impinging Triplet Injector,”Transactions of KSME, Vol. 20, No. 3, pp. 1005–1014.
Pazhi, D. L. and Galustov, V. S., 1976, “Liquid Atomizers,” Khimiya, Moscow.
Rupe, J. H., 1956, “A Correlation Between the Dynamic Properties of a Pair Impinging Streams and the Uniformity of Mixture Ratio Distribution in the Resulting Spray,”Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California.
Yoon, S. J., Cho, D. J., 1992, “A Study on the Spray characteristics due to Droplet Collision in Cross Region of Twin Spray System,”KSME 1992 Fall Annual Meeting (II), pp. 276–280.
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Kang, SJ., Lee, ES., Kwon, KC. et al. Twin spray characteristics between two impinging F-O-O-F type injectors. KSME International Journal 16, 732–742 (2002). https://doi.org/10.1007/BF03184823
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DOI: https://doi.org/10.1007/BF03184823