Browse > Article

A Characteristics of Smoke Layer Formation Affected Periodicity of Fire Plumes  

한용식 (한국기계연구원)
김명배 (한국기계연구원)
오광철 (한국과학기술원 기계공학과)
신현동 (한국과학기술원 기계공학과)
Publication Information
Fire Science and Engineering / v.16, no.2, 2002 , pp. 38-42 More about this Journal
Abstract
This experiment is to understand a characteristics of smoke layer formation affected periodicity of fire plumes. The ON-OFF jet was used to constitute the oscillating flow, which was formed by a mixture of nitrogen gas with kerosene particles. The instantaneous images was obtained by digital video camera using laser sheet technique. The results were confirmed that the smoke layer in the near fire source comprise vortices which are formed by impingement from the periodicity of fire plume. The periodic impinging of plumes were thickened the smoke layer and produced the back-flow.
Keywords
Impinging; Ceiling jet; Back-flow; ON-OFF jet; Periodicity; Plume; Visualization;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Atkinson G., 'Smoke Movement Driven bt a Fire Under a Ceiling', Fire Safety Journal, Vol. 25, 261-275(1995)   DOI   ScienceOn
2 Weckman E. J. and Sobiesiak A., 'The Oscillatory Behavior of Medium-scale Pool Fires', 22-th Combustion Symposium, 1299-1310(1988)
3 Kim M. B. and Han Y. S., 'Tracking of the Smoke Front Under a Ceiling by a Laser Sheet and Thermocouples', Fire Safety Journal, Vol. 34, 287-295(2000)   DOI   ScienceOn
4 McGrattan K. B. Forney G. P., Floyd J. E. and Hostikka S., Fire Dynamics Simulator(version 2.0) - User's Guide, NISTIR 6783(2001)(http://fire.nist.gov/fds)
5 Hamins A., Yang J. C., Kashiwagi T., 'An Experimental Investigation of the Pulsation Frequency of Flames', 24-th Combustion Symposium, 1695-1702(1992)
6 Alpert R. L., 'Turbulent Ceiling-Jet Induced by Large-Scale Fires', Combustion Science and Technology, Vol. 11, 197-213(1975)   DOI   ScienceOn
7 Naitoh T., Banno O. and Yamada H., 'Longitudinal Vortex Structure in the Flow Field Produced by a Vortex Ring Impinging on a Flat Plate', Fluid Dynamics Research, Vol. 28, 61-74(2001)   DOI   ScienceOn
8 Walker J. D. A., Smith C. R., Cerra A. W. and Doligalski T. L., 'The impact of a vortex ring on a wall', J. Fluid Mech., Vol. 181, 99-140(1987)   DOI   ScienceOn