Numerical study of the effect of fuel droplets on the combustion proceeding under typical conditions of hybrid rocket engines
V.A. Kosyakov1,2, R.V. Fursenko1, A.N. Shiplyuk1
1Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
2Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: hybrid rocket engine, computational fluid dynamics, combustion of gas-droplet fluid, diffusion flame
Abstract
Results of numerical simulation of the combustion of a gas-droplet fuel mixture in an oxidizer flow under conditions typical of hybrid rocket engines are reported. The effect of the size and rate of supply of fuel droplets on the combustion completeness, temperature and position of the diffusion flame in the boundary layer of the oxidizer flow has been studied. It is shown that the influence due to the liquid fuel droplets manifests itself as a local decrease of gas temperature and an increase of the concentration of the gaseous fuel in the immediate vicinity of droplets. The addition of droplets to the gaseous fuel flow results in a slight decrease of the flame thickness and flame temperature, which, however, experience no large-scale perturbations as a result of droplet movement and remain almost stationary.
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