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Disintegration Mechanism of a Coaxial Porous Injector
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 Title & Authors
Disintegration Mechanism of a Coaxial Porous Injector
Lee, Keonwoong; Kim, Dohun; Son, Min; Koo, Jaye;
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In a coaxial porous injector, a gas propellant is injected through the porous cylinder surface to the liquid jet which is encircled by a porous cylinder. In this study, to observe the differences in disintegration mechanisms between a shear coaxial injector and a coaxial porous injector, cold-flow tests and 2-D axisymmetric numerical analysis have been carried out. The shadowgraph images and Sauter mean diameters were compared in similar experimental conditions, and the effects of velocity distributions at the inner injector region on the disintegration of liquid jet were investigated through the numerical calculations. As a result, in high air mass flow rate condition, the disintegration performance of coaxial porous injector is better than shear coaxial injector, in spite of a lower velocity at the inner injector region.
Coaxial Porous Injector;Sauter Mean Diameter;Radial Momentum;
 Cited by
Long, M.R., Bazarov, V.G. and Anderson, W.E., "Main Chamber Injectors for Advanced Hydrocarbon Booster Engines," Proc. of 39th AIAA/ASME/SAE/ASEE Joint of Propulsion Conference and Exhibit, Huntsville, A.L., U.S.A., AIAA 2003-4599, July, 2003.

Kim, D., Seo, M., Lee, I. and Koo, J., "Effect of Weber Number and Momentum Flux Ratio on Macroscopic Characteristics of Spray from a Coaxial Porous Injector," Journal of the Korean Society of Propulsion Engineers, Vol. 16, No. 5, pp. 1-9, 2012

Kim, D., Lee, K. and Koo, J., "Combustion Performance of a Coaxial Porous Injector using Ethanol/N2O Propellant," Journal of the Korean Society of Propulsion Engineers, Vol. 17, No. 5, pp. 37-46, 2013.

Farago, Z. and Chigier, N., "Morphological Classification of Disintegration of Round Liquid Jets in a Coaxial Air Stream," Atomization and Sprays, Vol. 2, No. 2, pp. 137-153, 1992. crossref(new window)