侧向风速作用下聚氨酯泡沫双火源火蔓延研究.docx

侧向风速作用下聚氨酯泡沫双火源火蔓延研究
Title:StudyontheSpreadofPolyurethaneFoamFireinthePresenceofLateralWindSpeed
Introduction:
Polyurethanefoamisawidelyusedmaterialduetoitsexcellentthermalinsulationproperties.However,itishighlyflammableandcanposesignificantfirehazards.Thespreadoffiresinvolvingpolyurethanefoamcanbeinfluencedbyexternalfactorssuchaswindspeed.Thisresearchaimstoinvestigatetheeffectsoflateralwindspeedonthespreadoffiresoriginatingfromtwodifferentignitionsourcesinpolyurethanefoam.
Methodology:
1.Samplepreparation:
-Obtainpolyurethanefoamblocksofuniformsizeanddensity.
-Cuttheseblocksintosmallersamplesfortheexperiments.
-Ensurethatthesamplesareconsistentacrossalltrials.
2.Experimentalsetup:
-Setupawindtunneltosimulatedifferentwindspeeds.
-Placethepolyurethanefoamsamplesatafixeddistancefromeachother.
-Introducetwodifferentignitionsourcesateachendofthesamples.
-Measureandrecordthewindspeedandtemperatureinsidethetunnel.
3.Datacollection:
-Monitortheprogressofthefirebyrecordingtheflamespreadrateandthetimetakenforthefiretoreachdifferentpointsonthefoamsamplesineachtrial.
-Measurethetemperaturedistributionduringthefirespreadusingthermocouples.
-Recordthewindspeedanddirectionduringeachtrial.
4.Dataanalysis:
-Analyzetheinfluenceoflateralwindspeedonthefirespreadrateanddistancecovered.
-Comparethefirespreadbehaviorwithdifferentignitionsources.
-Identifythecriticalwindspeedatwhichthefiredynamicsaresignificantlyaffected.
-Analyzethetemperaturedistributionanditseffectonthefirespread.
Results:
1.Flamespreadrate:
-Theflamespreadrateisexpectedtoincreasewithhigherwindspeeds.
-Thefiremayspreadinthedirectionofthewind,leadingtofasterspreadoverthefoamsamples.
2.Firedistancecovered:
-Thefireislikelytotravelfurtherdownwindduetotheinfluenceoflateralwindspeed.
-Thedistancecoveredbythefireisexpectedtoincreaseasthewindspeedincreases.
3.Criticalwindspeed:
-Identifythewindspeedatwhichfirebehaviorchangessignificantly.
-Determinethepointwherefiresuppressionbecomeschallengingduetowind-drivenfirespread.
Conc