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Energies 2016, 9(12), 1072; doi:10.3390/en9121072

Numerical Simulation of a Vortex Combustor Based on Aluminum and Steam

1
Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha 410073, China
2
Department of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Ficarella
Received: 10 October 2016 / Revised: 8 December 2016 / Accepted: 9 December 2016 / Published: 16 December 2016
(This article belongs to the Special Issue Combustion and Propulsion)
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Abstract

In this paper we report a new development in the numerical model for aluminum-steam combustion. This model is based on the diffusion flame of the continuum regime and the thermal equilibrium between the particle and the flow field, which can be used to calculate the aluminum particle combustion model for two phase calculation conditions. The model prediction is in agreement with the experimental data. A new type of vortex combustor is proposed to increase the efficiency of the combustion of aluminum and steam, and the mathematical model of the two phase reacting flow in this combustor is established. The turbulence effects are modeled using the Reynolds Stress Model (RSM) with Linear Pressure-Strain approach, and the Eddy-Dissipation model is used to simulate the gas phase combustion. Aluminum particles are injected into the vortex combustor, forming a swirling flow around the chamber, whose trajectories are traced using the Discrete Phase Model (DPM). The simulation results show that the vortex combustor can achieve highly efficient combustion of aluminum and steam. The influencing factors, such as the eccentric distance of the inlet of aluminum particles, particle size and steam inlet diameter, etc., are studied. View Full-Text
Keywords: aluminum particle; steam; vortex combustor; diffusion flame; numerical simulation aluminum particle; steam; vortex combustor; diffusion flame; numerical simulation
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Chen, X.; Xia, Z.; Huang, L.; Ma, L. Numerical Simulation of a Vortex Combustor Based on Aluminum and Steam. Energies 2016, 9, 1072.

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