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Titel och upphov Analysis of the large urban fire environment. P. 1 Theory
Utgivning, distribution etc. Pacific-Sierra Research Corp., Los Angeles, Calif.: 1982
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Anmärkning: Allmän Klammerhft. "June 1982 Final report, contract EMW-C-0747, work unit 2564E" "For Federal Emergency Management Agency, National Preparedness Program" Klammerhft.
Anmärkning: Innehållsbeskrivning, sammanfattning This report considers the fire environment that would result from a megaton-yield nuclear weapon explosion. An analysis (developed in Part I) that treats the physics of the burning zone and the volume immediately above it (turning region) is used to predict the velocity, temperature and pressure fields of large area fires. The strongly buoyant flow generated in and around a large area fire is analyzed. Jump conditions applicable at the fire periphery are used to effect model problem closure, thus permitting calculations of induced fire winds independent of a far-field analysis. Combustion processes are modeled by a volume heat addition. The induced flow is compressible, with arbitrary changes in temperature and density allowed. In one parameter limit, the model equations can be solved exactly. The resulting solution concisely describes the basic interchanges of energy and momentum as well as the role of pressure gradients in fire-wind generation. In general, the localized analysis provides a framework for detailed studies of the complex physics of fire-generated flows without recourse to extensive numerical computations involving the far field. The analysis is applied in simulations of the turning region environment created by 1 an experimental, multiple-fuel-bed Flambeau fire, and 2 the World War II Hamburg firestorm. Computed results duplicate observed flow patterns and are consistent with reported data.
Term Bränder Städer Matematiska modeller Explosioner Kärnvapen Atombomber Vindar Förbränning Kärnenergi Kärnkraftsolyckor
Indexterm - Okontrollerad
Personnamn
*000 am a a
*00155420
*008 | xxu e| ||| 0|eng||
*041 $aeng
*084 $aPs$2kssb/8
*084 $aP.086$2kssb/8
*084 $aSf$2kssb/8
*1001 $aLarson, David A.
*24510$aAnalysis of the large urban fire environment.$nP. 1$pTheory /$cby D.A. Larson, R.D. Small
*260 $aLos Angeles, Calif.:$bPacific-Sierra Research Corp.,$c1982
*300 $a34, [10] bl. :$bdiagr.
*490 $aPSR report ;$v1210
*500 $aKlammerhft.
*500 $a"June 1982 Final report, contract EMW-C-0747, work unit 2564E"
*500 $a"For Federal Emergency Management Agency, National Preparedness Program"
*500 $aKlammerhft.
*520 $bThis report considers the fire environment that would result from a megaton-yield nuclear weapon explosion. An analysis (developed in Part I) that treats the physics of the burning zone and the volume immediately above it (turning region) is used to predict the velocity, temperature and pressure fields of large area fires.
*520 $bThe strongly buoyant flow generated in and around a large area fire is analyzed. Jump conditions applicable at the fire periphery are used to effect model problem closure, thus permitting calculations of induced fire winds independent of a far-field analysis. Combustion processes are modeled by a volume heat addition. The induced flow is compressible, with arbitrary changes in temperature and density allowed. In one parameter limit, the model equations can be solved exactly. The resulting solution concisely describes the basic interchanges of energy and momentum as well as the role of pressure gradients in fire-wind generation. In general, the localized analysis provides a framework for detailed studies of the complex physics of fire-generated flows without recourse to extensive numerical computations involving the far field. The analysis is applied in simulations of the turning region environment created by 1 an experimental, multiple-fuel-bed Flambeau fire, and 2 the World War II Hamburg firestorm. Computed results duplicate observed flow patterns and are consistent with reported data.
*650 7$aBränder$2sao
*650 7$aStäder$2sao
*650 7$aMatematiska modeller$2sao
*650 7$aExplosioner$2sao
*650 7$aKärnvapen$2sao
*650 7$aAtombomber$2sao
*650 7$aVindar$2sao
*650 7$aFörbränning$2sao
*650 7$aKärnenergi$2sao
*650 7$aKärnkraftsolyckor$2sao
*653 $aAntändning
*653 $aModeller
*7001 $aSmall, R. D.
*852 $cPs
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