Experimental measurement of direct thermal radiation through single-layer square-cell plain woven screens

Hashempour, Javad and Sharifian, Ahmad and Billingsley, John (2016) Experimental measurement of direct thermal radiation through single-layer square-cell plain woven screens. Journal of Heat Transfer: Transactions of the ASME, 138 (1). 012701-1-012701-6. ISSN 0022-1481

Abstract

Australian bushfires have killed many people and caused severe damage; like as any other type of disaster. Previous studies have identified direct flame contact and radiant heat as the main cause of fatalities.The role of screens in limiting the radiation exposure on an object by fire on the other side of the screen is well-known, but still it has not been experimentally determined. A screen between a radiation source and an object divides the radiant heat flux into two parts. The first part is direct radiant heat flux that passes directly through the screen without any interaction. The second part is indirect radiation heat flux, which includes both emitted and reflected radiant heat fluxes by the heated screen. This experimental study deals with the direct radiant heat flux, which depends on the screen porosity and is independent of the material composition or the surface quality of the screen. The experimental results of four square cell,plain woven screens with porosities ranging from 41% to 66% show that the passing ratios of direct radiant heat flux through screens are less than those suggested by their porosity. Four empirical equations have been developed to determine the passing ratio of the direct radiation through screens, and tunnel vision angles of the screens.


Statistics for USQ ePrint 27387
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2015 by ASME. Permanent restricted access to paper due to publisher copyright restrictions.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering
Date Deposited: 20 Oct 2015 03:56
Last Modified: 29 Mar 2017 04:21
Uncontrolled Keywords: bushfire, fire radiation, tunnel vision, woven wire screens, view factor, shape factor, wildland fire, wire mesh.
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
05 Environmental Sciences > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment
05 Environmental Sciences > 0599 Other Environmental Sciences > 059999 Environmental Sciences not elsewhere classified
09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
12 Built Environment and Design > 1204 Engineering Design > 120402 Engineering Design Knowledge
09 Engineering > 0915 Interdisciplinary Engineering > 091505 Heat and Mass Transfer Operations
07 Agricultural and Veterinary Sciences > 0705 Forestry Sciences > 070503 Forestry Fire Management
12 Built Environment and Design > 1204 Engineering Design > 120401 Engineering Design Empirical Studies
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
B Economic Development > 85 Energy > 8505 Renewable Energy > 850506 Solar-Thermal Energy
E Expanding Knowledge > 97 Expanding Knowledge > 970110 Expanding Knowledge in Technology
D Environment > 96 Environment > 9610 Natural Hazards > 961004 Natural Hazards in Forest and Woodlands Environments
Identification Number or DOI: 10.1115/1.4031110
URI: http://eprints.usq.edu.au/id/eprint/27387

Actions (login required)

View Item Archive Repository Staff Only