The multilevel stepped-wall and rectangular observation chambers are designed to study the multipoint ignition process and the combustion stability control mechanism of the bulk-loaded liquid propellant gun. The expansion process and interaction of high-speed twin combustion-gas jets in liquid are studied by means of a high-speed digital camera system. The influence of the nozzle diameter, dual-orifice interval, jet pressure, and chamber structure on the jet expansion shape is discussed. The results indicate that a larger ratio of diameter-to-length can suppress the jet instability in stepped-wall chambers. Higher axial expansion velocity is found under the larger injection pressure, which it increases the instability of jet expansion process. Compared with a rectangular chamber, the axial expansion velocity is smaller, and the radial expansion velocity is larger in stepped-wall chambers under the same conditions. The theoretical studies of interaction of the gas jet with liquid were developed based on the experiment. Two-dimensional unsteady models are used to get the pressure, density, and velocity contours. The numerical simulation results coincide well with the experiment.
Study on Expansion Process and Interaction of High Speed Twin Combustion-Gas Jets in Liquid
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Yu, Y., Yan, S., Zhao, N., Lu, X., and Zhou, Y. (May 17, 2010). "Study on Expansion Process and Interaction of High Speed Twin Combustion-Gas Jets in Liquid." ASME. J. Appl. Mech. September 2010; 77(5): 051404. https://doi.org/10.1115/1.4001288
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