[PDF] Thermal and flow characteristics of the ASTM E 84 tunnel test method





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2013-04-23 Tolérances Générales ISO 2768.pptx

23 avr. 2013 -?la classe de précision (f m



CONCENTRATIONS MOLAIRE ET MASSIQUE V nC = M mn = MV

C : concentration molaire ( en mol.L-1). C0 : concentration initiale (en mol.L-1) n : nombre de mole ( en mol) dans un volume V0 initial.



UNITÉS DÉRIVÉES DU S.I. POUR LES GRANDEURS USUELLES

C. s.A potentiel électrique tension électrique



1 3 2 m C = V m V V C = V n

Concentration massique de la solution : m. C m. = V m. V. V. Avec : ? m la masse de soluté

Thermal and flow characteristics of the ASTM E 84 tunnel test method

m. V. » o ! Figure 4a. Air mass flow rate of T374 nylon carpet. (1 Ib/min = 0.00756 kg/s) •H m. 4-) rsi rd o. •H. 0 o. 0. W II. CO. < Xi u w c.



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University of Plymouth

16 oct. 2006 (a) If a charge 2 C is produced by applying a voltage 3 V what is the capacitance? (b) Show that

NBSIR75-705

ThermalandFlowCharacteristicsof

theASTME84TunnelTestMethod

JdiTiesG.QuintiereandJamesW.Raines

CenterforFireResearch

InstituteforAppliedTechnology

NationalBureauofStandards

Washington,D.C.20234

September1975

Final titOF

USDEPARTMENTOFCOMMERCE

NATIONALBUREAUOFSTANDARDS

NBSIR75-705

THERMALANDFLOWCHARACTERISTICSOF

THEASTME84TUNNELTESTMETHOD

JamesG.QuintiereandJamesW.Raines

CenterforFireResearch

InstituteforAppliedTechnology

NationalBureauofStandards

Washington.D.C.20234

September1975

Final

JamesA.Baker,III,UnderSecretary

CONTENTS

Page

LISTOFFIGURESiv

LISTOFTABLESV

1.INTRODUCTION1

2.DESCRIPTIONOFEXPERIMENTS2

3.RESULTSANDANALYSIS3

3.1.MassFlowRateofAir5

3.2.EnergyBalance6

4.CONCLUSIONS7

5.REFERENCES8

APPENDIXA.TABULATIONOFDATA9

APPENDIXB.SICONVERSIONUNITS20

iii

LISTOFFIGURES

Page

Figure1.Schematicofinstrumentation.(1in=

0.0254m,1ft=0.3048m)21

(1ft=0.3048m)22 standardtestforanenergyreleaserating.23 'mV»o! (1Ib/min=0.00756kg/s)24 (1Ib/min=0.00756kg/s)25 carpet.(1Ib/min=0.00756kg/s)....26 (floormounted).(1Ib/min=0.00756kg/s).27

Figure5.EnthalpyflowrateatsectionAforthe

calibrationrun.(1Btu/min=17.57W).28 calibrationrun.(1Btu/min=17.57W).29 andBforthecalibrationrun. (1Btu/min=17.57W)30 andBforT374,nyloncarpet.(1Btu/ min=17.57W)31 andBforT375,woolcarpet.(1Btu/min=

17.57W)32

andBforT376,polypropylenecarpet. (1Btu/min=17.57W)33 iv

LISTOFTABLES

Page

Table1.DescriptionofExperiments4

Table2.ClassificationResults5

TableA-1.DataChannelCodeandLocation10

CalibrationRun11

TableA-4.ExperimentNo.3:WoolCarpet14

TableA-5.ExperimentNo.4:NylonCarpet16

V

THERMALANDFLOWCHARACTERISTICS

OFTHEASTME84TUNNELTESTMETHOD

JamesG.QuintiereandJamesW.Raines

Fiveexperimentswereconductedusingan

ASTME84tunneltestfacility.Theseincludeda

carpetmaterials,andonetestinwhichacarpet materialwastestedontheflooroftheduct.In additiontothemeasurementsrecordedduringa sectionoftheduct,andheatflux.Fromthese thatinletairmassflowratedroppedduringa thatforthecalibrationrunabouthalfofthe energyofthegasburnerislostbyradiationand tunnel.Duringcombustionofatestspecimen, ofthetestsectionevenaftertheflametiphas reachedtheexitofthetunnel.

Keywords:ASTME84;carpets;energybalance;

flamespread;massbalance;testmethod.

1.INTRODUCTION

ASTMasa"TentativeMethod."

listedattheendofthispaper. 1 systemvariables. duringatunneltest.

2.DESCRIPTIONOFEXPERIMENTS

2 thetunneltoviewtheburningspecimen. ration.

3,RESULTSANDANALYSIS

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Table2.ClassificationResults

1 Test

Flame-spread

Classification

FuelContri-

butedFactor

SmokeDensity.

Factor

1

Polypropylene

carpet;T-3766920 j 110!

Woolcarpet;

T-37519784

i 2971

Nyloncarpet;

T-37416969243i

Nyloncarpet,floor-

mounted;T-37710778 i 5651
1

3.1.MassFlowRateofAir

m=/pVdA(1)a whichisapproximatedby

3m=p2V.A.(2)aa.,111=1

resultoftheseapproximationsyields lb m=0.130pIV,^+""^+V,_|-j^(3)aaV15217/min wherep=0.0746lb^am 5 *3.2.EnergyBalance isaneffectivetemperature, lossrate.

T+T+TT+T

^B6^4 whereT Q, 1,2 6 anceswillbegiven. lossisincurredbetweenstationsAandB.

Q.-E=mc(T^-T")(7)£apAB

theendoftheduct.

4.CONCLUSIONS

ments. theendoftheduct. 7

5.REFERENCES

CanadianStandardsAssociation(1972)

50,52(May1970)

(Nov.1974) 8

APPENDIXA.TABULATIONOFDATA

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