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Critical Conditions for Fire-Induced Smoke Confinement by Air Curtain in Long Channels

[+] Author Affiliations
Jie Ji, Ran Huo, Jinhua Sun

University of Science and Technology of China, Hefei, Anhui, China

Wei Zhong

Zhengzhou University, Zhengzhou, Henan, China

Paper No. HT2009-88624, pp. 193-199; 7 pages
doi:10.1115/HT2009-88624
From:
  • ASME 2009 Heat Transfer Summer Conference collocated with the InterPACK09 and 3rd Energy Sustainability Conferences
  • Volume 3: Combustion, Fire and Reacting Flow; Heat Transfer in Multiphase Systems; Heat Transfer in Transport Phenomena in Manufacturing and Materials Processing; Heat and Mass Transfer in Biotechnology; Low Temperature Heat Transfer; Environmental Heat Transfer; Heat Transfer Education; Visualization of Heat Transfer
  • San Francisco, California, USA, July 19–23, 2009
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4358-1 | eISBN: 978-0-7918-3851-8
  • Copyright © 2009 by ASME

abstract

The air curtain can be adopted to slow down or stop smoke spread, in case of channel fires, with no influence of the normal usage of the channels and on the human evacuation. The flow field of air curtain jet from ceiling to floor was divided into 3 sections, i.e. the section of impinging mixing, non-isothermal jet and impinging floor and the theoretical analysis of fire-induced smoke control by air curtain in long channels was carried out. The formulas of the critical conditions for absolutely preventing smoke from intruding the protected side were obtained. With the Realizable k–ε model and the numerical solutions of the formulas as the initial and boundary conditions, an application example was simulated. Results showed that the three-section analysis method was reasonable and the simulated results verified the rationality of the theoretical prediction model.

Copyright © 2009 by ASME

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