Page 194 - konishipaper

Fig.9. TypicalIRandinterferogramimages.
themir<:>rp1acedontheothersidea1soreflectedthe IRraypartialy，theraywasrecordedbytheIRcam- e1'a(In企ametricsMode1760，HgCdTe7K).TheIR rayhadan8-12μmspectra1range，atemperatu1'e reso1utionof0.1oC，andaresponsetimeof30ms. TheIRimagewasacurate1yinterpretedintovapo1' concentrationbyimageprocesingsoftware.Se1ect- ingtheglaslniroristhemostcritica1decisionwhen designingtheexperimenta1aparatus.Themiror lnustbese1ectedsothattheH←Ne1ase1'beamcan pasth1'oughitandtheIRraywilbe1'eflected.
5. ResultsandDiscusion
Thetypica1resu1tsoftheIRimagesandtheho1o- graphicinterfe1'ogramsa1'eshowninFigs.9(a)and 9(b)，1'espective1y.Aquasi-steadystateconditionfo1' n-p1'opano1ata400C bulktempe1'aturewasob- se1'vedforthemeasurement.Thepositionoftheteln- peratu1'edistributionandconcentrationdistribution wasright-and-Ieftreve1'seduetothe1'e宜ectionbythe miror.TheIRimageandtheholographicinterfero- graln were inte1'preted into 2D concentration and
temperaturepro五lesbyusingEqs.(12)and(14).Fig
o。
n-propanol T;=400C
8 6 4
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o 2 4 6 8 10 12 14 16
Verticaldistancefromfuelsurfacez(mm)
Fig.12. Comparisonbetwen出βexperimentalresultsofthe IR-HImethodandthe1Ddifusion也eoryandthermocouple method.
1August206IVo.l45，No.2IAPPLlEDOPTICS 5731
Fig.10. Two-dimensionalquasi-steady-stateconcentrationpro・ filesbytheIR-HImethod.
司
司ロpropanol Tf=400C
'1/ '1
5
5
-15 -10 5 10 15
Distance"fromcenteroftrayY(lil) Fig.1 1. T wo-dimensional quasi-steady-state temperature pro-
filesobtainedbytheIR-HImethod.
ures10and1showtheisoconcentrationlinesand theisotherma11ines，respective1y.Thexcordinate showsthehorizonta1distancefromthecenterofthe tray，andthezcordinateshowsthevertica1distance 仕 omthefue1surface.AstheIRimageandtheho1o司 graphicinterferogramwerenotsymetrica1dueto air丑ow(aproxj.lnate1y10cm/s)overthefue1tray，20 the2Dprofi1esoftheobtainedtemperatu1'eandcon- centrationwe1'easymmetric，andthetwoprofi1es1'e- semb1edeachother，asshowninFigs.10and1.The theo1'etica1lineca1cu1atedforthe1Ddifusionequa- tion20isindicatedinFig.12forcomparisonwiththe experimenta1data.Thesolidsymbo1sshowtheave1'- ageva1ues，andthee1'rorbarsindicatethe1'angeof themaximUlnandtheminimumva1uesalongwith thexco1'dinate.Themeasu1'edconcentrationp1'o- fi1esagrefair1ywelwiththetheoretica1results.The tempe1'aturep1'ofi1eindependent1ymeasuredtytheY- mocoup1esisa1soshowninFig.12.ThemeaSU1'enlent procedures fo1' the theTl l1ocouple temperature lnea- surements have been exp1ained in previous pa- pers.14，15EightChrOlnelーAlume1the1'mocoup1ewires of50μmdiameterwerestretchedoverthefue1su1'- faceatinte1'va1sof1mm.Thejunctionsofthether-
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