A model for attenuation of fire radiation through water droplets

Ravigururajan, T. S.; Beltran, Michael

doi:10.1016/0379-7112(89)90002-7

Cited by 77 publications

(29 citation statements)

References 4 publications

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“…(Cheung, 2009, Yang et al, 2003 -Droplets from several tens to several hundred μm have strong absorptive and anisotropic scattering characteristics, whereas water vapour and CO 2 only absorb radiation (depending on the wavelength). (Boulet et al, 2006) • The maximum attenuation factor of radiation was achieved when the radius of droplets was approximately equal to IR -wavelength (0.6 -25 μm) (Cheung, 2009, Ravigururajan et al, 1989)/ another source states that the spray provided maximum blocking effi ciency when the droplet diameter was the same order as the maximum emission wavelength of the source. (Drysdale et al, 2000, Coppalle et al, 1993 pp.…”

Section: Water Curtains and Their Characteristicsmentioning

confidence: 99%

Attenuation of Infrared Radiation When Passing Through a Water Curtain

Balner¹,

Barčová²,

Dostál³

2017

TRANSACTIONS of the VŠB – Technical University of Ostrava, Safety Engineering Series

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Abstract:This article focuses on the interaction of infrared (IR) radiation with water droplets. The main objective of the article is the production of water mist in order of evaluation the reduction in intensity of IR radiation. In the experiments described in this paper, a set of fi ve different nozzles was used with various spray characteristics. The respective nozzles were gradually located between the IR radiation source and a detector and the attenuation of IR radiation was assessed. The reduction in IR radiation intensity was determined and IR radiation transmittance was calculated for the respective tested nozzles.

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Section: Water Curtains and Their Characteristicsmentioning

confidence: 99%

Attenuation of Infrared Radiation When Passing Through a Water Curtain

Balner¹,

Barčová²,

Dostál³

2017

TRANSACTIONS of the VŠB – Technical University of Ostrava, Safety Engineering Series

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“…Very few works in the architectural literature investigate water curtains or screens (Amano et al 2005;Ma 2004-2005;Coppalle et al 1993;Dembele et al 2001;National Fire Protection Association 1982;Ravigururajan and Beltran 1989).…”

Section: Fire Resisting Wallmentioning

confidence: 99%

Fire Safety Aspects of Refuge Floors in Supertall Buildings With Computational Fluid Dynamics

Chow

2009

Journal of Civil Engineering and Management

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Abstract. High-rise buildings in many big cities in the Far East, including Hong Kong, call for refuge floors as a matter of both practicality and compliance with regulations. Even though many countries' fire codes are not clear in spelling out the necessity for refuge floors, it is accepted within construction that such floors are essential in resisting fire, allowing users a means of escape and allowing emergency services a means of access to stricken buildings. This paper discusses the reasons behind providing refuge floors, while also considering related fire safety provisions, such as their enclosure behind fire-resistant construction or the protection of their openings behind a water curtain. Our discussion takes a tall building with balconies as a test example of refuge floors, running a hazard assessment based on Computational Fluid Dynamics assuming a fire of the broadly accepted level of 2 MW. The paper concludes that the design of the building's façade finally determines whether or not a refuge floor and associated fire safety provisions, such as a water curtain, can be waived. As the flat modelled used to store a high amount of combustibles up to 1135 MJm -2 , the breaking of large area of glass window could lead to a major conflagration. The consequences of a scenario with a fire of 25 MW are also discussed.

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“…The attenuation of thermal radiation by liquid droplets is an important consideration, especially for water mist systems [48]. Liquid droplets attenuate thermal radiation through a combination of scattering and absorption [49].…”

Section: Absorption and Scattering Of Thermal Radiation By Dropletsmentioning

confidence: 99%