Page 188 - konishipaper

imultaneousmeasureme ()ftemperatlUreandche speciesconcentrationswi aholographicRnterfer andunfraredabsorptao
TadashiKonishi，AkihikoIto，YuJiKudo，AkiraNarumi，KozoSaito，JohnBaker，andPeterM.Struk
Whatisbe1ievedtobeanewtechniquethatalowsforthesimultaneousmeasurementof2Dtemperature andchemicalspeciesconcentrationprofi.les柄 thhighspatialresolutionandfasttimeresponsewasdevel- - oped血 dtestedsuces.nulybymeasuringatbinlayeroffuelvaporcreatedoveravolatilefuelsurface: Normalpropanolwasplacedinanopen-toprectangularcontainer，andn・propanolfuelvaporwasformed overthepropanolsurfaceinaquiesce凶 laboratoryenvironment.An1Rbeamwithawavelengthof8-13トLm emited仕omaheatedplate出 ldaHe-Nelaserbeamwithawavelengthof632nmwerecombinedand pasedthroughthen-p1'opanolvaporlayer，andbothbeamswereabsorbedbythevaporlayer.The absorptionoftheIRbeamwasrecordedbyanIRcamera，andtheH←Nelaserwasusedtoforma holographicinterferogr百 n.Two-rumensionaltemper叫 UI・e阻 dpropanolvaporconcentr叫 ionprofi.leswere， respectively，de白rminedbythe-IRabsor予tionandthe色相gepatemasociatedwiththeholographic interferogram.由討snewmeasurementtechniqueisasignifi.ca叫 improvementoverthedualwavelength holographicinterferometrythathasbenusedpreviouslytomeasuretemperatUI・e阻 dfuelconcentration， anditisreadyfo1'aplicationunder出 品renttypesoffi.reandflameconditions. @206OpticalSociety of.America
OCIScodes:・ 090.280，130.3060.
1. Iniroduction
Understandingthecharacteristicsofuelvaporforma- tionisimportantforpredictingexplosionhazardsin manyaplications.Signi五cantfuelleakage，andthus theposib出tyofanexplosion，mayoccurduringauto- mobileacidentsastheresultofdamagetofue1storage tanksduringnaturaldisasterssuchasearthquakes，or
T.Konishiiswi白 血eDepartmentofM田 h紅 祉 問1Eng.in田 'ring，Oita NationalColegeofTechnology，16Maki，Oita870-0152，Japan.A. 1toandY.KudoarewiththeDepartmentofInteligentMacbine andSystemEnginering，Hi1'osakiUniversi臥 3Bunkyo・cho，
astheresultofterorisln.l-31naspaceenviromnent， onthe1nternationalSpaceStationforexamp1e，10sby 五reisunfathomab1e.41npo1fires，itisthefue1vapor thatfonnsjustabovetheliquidsurfacethatignitesto producethe丑ame.1tiswellknownthatthebehavior of宜amesinamicrogravityenvironmentis五mdamen- talydiferent企omthatobservedhereonEarth.Un- fortunate1y，Ol古 田lderstand:il1gofiresproducedasthe resultofthecombustionofliquidfue1sinamicrograv- ityenvironmentisincomplete.Giventhis，itiseven moreimportantthatahighlyaccuratemeansofchar- acteriz:ingtransient五le1vaporformationbedeveloped.
1nthispaperwhatisbelievedtobeanewmethodto measurethetransient2Dfue1vaporconcentrationand temperaturedistributionhasbeendevelopedthatcan beusedtostudythecOlnbustionmechanismsasoci-
8561，Japan.A.:NarumiiswiththeDepart- mentofMechanicalEnginering，Kanagawa1nstituteofTechnol- ogy，Atsugi，Kanagawa042・8561，Jap回 .K.Saito(saito@engr.
Hirosaki，Aomori036
・
uky.edu)iswiththeDepartmentofMechanicalEnginering， atedwithl:iquidfuels.Amethodthathasbeenprevi-
Unive1'sity ofKentucky，Lexington，Kentucky 40506・0503.J. BakeriswiththeDepartmentofMechanicalEnginering，Univer- sityof.Alabama，Tuscalosa，.Alabama35487-0276.P.M.Struk iswiththeNASAGlenResearchCenter，Coml;ustionandReact- ingSystemsBranch，210B1'okparkRoad，MailStop10・3， Clevel田 ld，Ohio4135.
Received16September205;revised7March206;acepted10 March206;posted10March206(Doc.1D64849).
03-6935/06/25725-08$15.0/0 @206OpticalSocietyofAmerica
ouslyusedforsuchapurposeisthedualwave1ength holographicinterferometry(DWH1)method.5-8 The DV¥在五 methodrealizesthetransient2Dmeasurement oftemperatureandconcentrationdistributionbyus- ingtheinterference企ingeshiftof加 '0beamso.flaser lighthavingdiferentwave1engths.Thewave1ength diferencebetweenthetwobeamsispracticalyl:imited tobetween100and300m n，andthedispersionofthe interferencefringesisverysmall.Sincethere企active
1August206/Vo.l45，No.2/APPLlEDOPTICS 5725
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