Numerical Simulation of Dust Dispersion in 5 L Vessel

Abstract:

Numerical simulation was used to obtain the transient concentration of dust in the process of dispersion in a closed vessel in this work. Through the transient concentration of dust obtained by numerical results, the best ignition delay time can be evaluated. For the 5 L vessel and the hemispherical injection nozzle and under the blow pressure of 0.5 MPa, the ignition delay time should be 50-100 ms. Numerical results agree with the data obtained in the experiments under the same condition. It is difficult that dust concentration in the process of dispersion reaches absolutely uniform everywhere in the closed vessel.

• Periodical: Advanced Materials Research (Volume 705)
• Pages: 436-441
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.705.436
• Online since: June 2013
• Authors: Jia Chen Chen, Qi Zhang, Qiu Ju Ma
• Keywords: Concentration of Dust, Dust Dispersion, Dust Explosion, Numerical Simulation

References

[1] S. Calle, L. Klaba, D. Thomas, L. Perrin, O, Dufaud Influence of the size distribution and concentration on wood dust explosion: Experiments and reaction modeling, Powder Technology 157 (2005) 144 – 148

DOI: 10.1016/j.powtec.2005.05.021

[2] K.L. Cashdollar, I. Liebman, R.S. Conti, Three bureau of mines optical dust probe, Report of Investigations 8542, US Bureau of Mines, US Department of Interior, Washington, 1981.

[3] R.S. Conti, K.L. Cashdollar, I. Liebman, Improved optical probe for monitoring dust explosions, Review of Scientific Instruments 53 (1982)311-313

DOI: 10.1063/1.1136969

[4] R. Pilao, E. Ramalho, C. Pinho, Overall characterization of cork dust explosion, Journal of Hazardous Materials 133 (2006) 183–195

DOI: 10.1016/j.jhazmat.2005.10.015

[5] O. Kalejaiye, P.R. Amyotte, M.J. Pegg, K.L. Cashdollar, Effectiveness of dust dispersion in the 20-L Siwek chamber, Journal of Loss Prevention in the Process Industries 23(2010)46–59

DOI: 10.1016/j.jlp.2009.05.008

[6] K.L. Cashdollar, Overview of dust explosibility characteristics, Journal of Loss Prevention in the Process Industries 13 (2000)183–199

DOI: 10.1016/s0950-4230(99)00039-x

[7] K.L. Cashdollar, K. Chatrathi, Minimum explosible dust concentrations measured in 20-L and 1-m3 chambers. Combustion Science and Technology 87(1992)157–171

DOI: 10.1080/00102209208947213

[8] K.L. Cashdollar, M. Hertzberg, 20-L explosibility test chamber for dusts and gases. Review of Scientific Instruments 56(1985)596–602.

DOI: 10.1063/1.1138295

[9] K.L. Cashdollar, M. Hertzberg, G. M. Green, Hazards of explosives dusts: Particle size effects, Pittsburgh Research Center Internal Report 49(1992)48

DOI: 10.2172/6721574

[10] A. Garcia-Agreda, A. Di Benedetto, P. Russo, E. Salzano, R. Sanchirico, The role of ignition delay time on the deflagration index in a 20L bomb, Sixth Fire and Explosion Hazards Seminar (FEH6) (2010)11–16, University of Leeds