Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4980355 | Journal of Loss Prevention in the Process Industries | 2017 | 31 Pages |
Abstract
The present research deals with a hybrid combustion of aluminum/boron dust particles in a heterogeneous quiescent reaction medium with spatially discrete heat sources. A developed thermal model is employed to estimate flame propagation speed in a reaction medium. The burning velocity and minimum ignition energy are studied parametrically as a function of dust concentration and particle diameter for different percentages of boron powder in a hybrid mixture of aluminum/boron dust cloud. The model shows that the addition of boron powder as a component of the mixture decreases the burning rate and causes a higher amount of minimum ignition energy needed for ignition, owing to the role of boron as a heat sink. Comparison of the simulation results with the available experimental data shows that the model captures the flame propagation speed as a function of particle concentration, except at very low concentrations.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Abolfazl Afzalabadi, Alireza Khoeini Poorfar, Mehdi Bidabadi, Hesam Moghadasi, Simone Hochgreb, Alireza Rahbari, Charles Dubois,