Experimental investigation of explosion pressures and flame propagations by wall obstruction ratios and ignition positions

Dal Jae Park; Young Soon Lee

Korean Journal of Chemical Engineering, Vol.29, No.2, 139-144, February, 2012

DOI10.1007/s11814-011-0159-5 Export Citation

Experimental investigation of explosion pressures and flame propagations by wall obstruction ratios and ignition positions

Dal Jae Park, and Young Soon Lee^†

Department of Safety Engineering, Seoul National University of Science and Technology, Seoul 139-743, Korea

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Experimental studies were carried out to investigate the effects of different ignition source locations and wall obstructions in a partially opened chamber, 235 mm in height, with a 1,000×950 mm2 cross section and with a large top-venting of area of 1,000×320mm2. Four different ignition positions such as the bottom, side, corner and top, and three wall obstacles with blockage ratios ranging from about 10 to 30% were used. The comparisons between wall obstacles in the chamber showed that the dependence of overpressure on obstruction ratios was different compared with published experiments with a large L/D ratio enclosure. This may be linked to the characteristics of the chamber. The smallest wall obstacle caused the highest overpressure, while the largest one caused the lowest overpressure. The flame propagation and pressure development were highly sensitive to the ignition positions. The bottom ignition caused the highest overpressure, while the top ignition the closest to the vent opening caused the lowest overpressure.

Keywords:Ignition Locations;Solid Obstacles;Flame Propagation;Overpressure

[References]

Park DJ, Lee YS, Korean J. Chem. Eng., 26(2), 313 (2009)
Pritchard DK, Freeman DJ, Guilbert PW, J. Loss Prev. Process Ind., 9(3), 205 (1996)
Phylaktou H, Andrews GE, Combust. Sci. Technol., 77, 27 (1991)
Hargrave GK, Jarvis SJ, Williams TC, Measurement Sci. Technol., 13, 1036 (2002)
Moen IO, Donato M, Knystautas R, Lee JH, Combust. Flame., 39, 21 (1980)
Masri AR, Ibrahim SS, Nehzat N, Green AR, Exp. Therm.Fluid Sci., 21, 109 (2000)
Ibrahim SS, Hargrave GK, Williams TC, Exp. Therm. Fluid Sci., 24, 99
Ellis OC, Wheeler RB, J. Chem. Soc., 2, 3215 (1928)
Kirkyby WA, Wheeler RV, J. Chem. Soc., 2, 3203 (1928)
Solberg DM, Pappas JE, Skramstad E, Eighteenth Symposium (International) on Combustion, Combustion Institute, 1607 (1981)
Green AR, Nehzat N, Proceedings Queensland Mining Industry Heath and Safety Conference, 240 (1999)
Kindracki J, Kobiera A, Rarata G, Wolanski P, J. Loss Prevention in the Process Industries., 20, 551 (2007)
Park DJ, Green AR, Lee YG, Chen YC, Combust. Flame, 150(1-2), 27 (2007)
Park DJ, Lee TS, Lee YS, J. KOSOS., 23, 81 (2008)

[Referenced By]

[1] Park DJ, Lee YS, Korean J. Chem. Eng., 26(2), 313 (2009)

[2] Pritchard DK, Freeman DJ, Guilbert PW, J. Loss Prev. Process Ind., 9(3), 205 (1996)

[3] Phylaktou H, Andrews GE, Combust. Sci. Technol., 77, 27 (1991)

[4] Hargrave GK, Jarvis SJ, Williams TC, Measurement Sci. Technol., 13, 1036 (2002)

[5] Moen IO, Donato M, Knystautas R, Lee JH, Combust. Flame., 39, 21 (1980)

[6] Masri AR, Ibrahim SS, Nehzat N, Green AR, Exp. Therm.Fluid Sci., 21, 109 (2000)

[7] Ibrahim SS, Hargrave GK, Williams TC, Exp. Therm. Fluid Sci., 24, 99

[8] Ellis OC, Wheeler RB, J. Chem. Soc., 2, 3215 (1928)

[9] Kirkyby WA, Wheeler RV, J. Chem. Soc., 2, 3203 (1928)

[10] Solberg DM, Pappas JE, Skramstad E, Eighteenth Symposium (International) on Combustion, Combustion Institute, 1607 (1981)

[11] Green AR, Nehzat N, Proceedings Queensland Mining Industry Heath and Safety Conference, 240 (1999)

[12] Kindracki J, Kobiera A, Rarata G, Wolanski P, J. Loss Prevention in the Process Industries., 20, 551 (2007)

[13] Park DJ, Green AR, Lee YG, Chen YC, Combust. Flame, 150(1-2), 27 (2007)

[14] Park DJ, Lee TS, Lee YS, J. KOSOS., 23, 81 (2008)