Preprint Article Version 1 NOT YET PEER-REVIEWED

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
Version 1 : Received: 11 October 2016 / Approved: 12 October 2016 / Online: 12 October 2016 (10:11:48 CEST)

How to cite: Chen, X.; Xia, Z.; Huang, L.; Ma, L. Numerical Simulation of a Vortex Combustor Based on Aluminum and Steam. Preprints 2016, 2016100039 (doi: 10.20944/preprints201610.0039.v1). Chen, X.; Xia, Z.; Huang, L.; Ma, L. Numerical Simulation of a Vortex Combustor Based on Aluminum and Steam. Preprints 2016, 2016100039 (doi: 10.20944/preprints201610.0039.v1).

Abstract

In this paper we report a new development on the numerical model for aluminum-steam combustion. This model is based on diffusion flame of 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 good agreement with the experimental data. A new type of vortex combustor was proposed for the combustion of aluminum and steam, and the mathematical model of the two phase reacting flow with in this combustor was 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 and form a swirling flow around the chamber and their trajectories are traced using the Discrete Phase Model (DPM). The simulation results show that the vortex combustor can achieve high 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. The work described in this paper represents an attempt to the design of a vortex combustor in order to increase aluminum combustion efficiency.

Subject Areas

aluminum particle; steam; vortex combustor; diffusion flame; numerical simulation

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