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Step(a)
Step(b)
Step(c)
Step(d1)
Step(~)
日 出 羽B -，---~-.，i.虫色 γ
Buoyancyinduceaflow 、崎、、
-x Gas Liquid
Recirculationcel、
molecularweight，subscriptsi 1standsfortheHe-Nelaser beam，and'i= 2standsforAr-ionlaserbeむn.
D Whologramscontainhologramsoftwodiferentwavelengths
，
UncertaintyAnalysis UncertaintyestimatesweremadeforLSPT叩 dDWHIusingthe
methodofK且neandMcClintock(1953).
LSPT: Uncertainties acount for geometric unce抗心nty
causedbythefinitethicknesofthelasershet，measurement
Step(a)
Step(b)
Step(c)
Step(d1)
Fig.4 Fourdiferentf!ow-visuai!zationphotographsobtainedforsteps (a，b，c，andd1)
Transactions01theASME
、、 司、 、 l
・ム 、、
、 句 句、 、 、 、 l 、
べ:，~，，
--:-;
a~ "，i;〆軒と 酒・- -γ
率gffミ¥
二 三 訟 に ベ 、 寸 薗 i Y . : . . イプ ウ鰐建喜三三
『 唱( -ー-_.・ーーー
之
側 on-耐 ven-flo CircuIarconvectivezone(CCZ)
山
Flamablel a y e r ι Flame
w
ふく二二二二ケ句、話. ~1
sτF
Flame ~云宅さき三きとヲー
日ame
Step(e)
Fig.3 Schematicsofthepu!satingf!amespread
8=n-l (3) D =Rs-Rα ( 4 )
whereT= tempera印re，C= mole企actionoffuelvapor，P= presure，Ro= uniyersalgas'constant;n= re企active出dex，R= molarre企activi句rofspecies，subscripts;入1= wavelengthoflaser beam(1)(632.8-nm-He-Ne-laserbeむn)，and入2 =wavelengthof l a s e r b e a m ( 2 ) ( 4 8 8 - n m - A r - I o n - l a s e r b e 姐 1) ， α = a i r ， 戸 = 負 l e .l T h e DW1丑 method is susceptible ω s ma1 erors because the Gladstone-Daleconstantsareonlyweakfunctionsofwavelength. AplyingDWHItotheflame-spreadproces，.thepa出 length(or む ay width) must be deteITnined to preserve 也 e 日出 ne in two d.imensions.Therefore，as出e長ingedi百erencebetwenthetwo beamsisve可 smal，itisve巧rdificulttoperformaqu叩ti.tative measureusingtheEqs.(1)through(め.Consequently，wepropose thesingl.e-~ã~~~g.ili method，.whichisshowninEq.(5)，to proces s 血 e DW1丑 data:
入;N
Cj= MN ¥ (5)
L Ps¥ Ksj - M s 川
where入 =wavelengthoflaserbeam，N = 丘inge-shiftnumber，L
= pathlength，P= density，κ =Gladstone-Daleconstant，M = 416IVo.1121，MAY1999
目
且今 l、
tobesep紅 ated.WefirstrecordedtheD Whologramson aholographicplate.Then，duringtheprintingproces，twodifer- entfilterswereusedtosep紅 atethetwoholograms.Thesefilters havenarrowband-paswidths，eachpasingthewavelengthmatch to出atofitsrespectivelaserbeam.
L
出atneed
・ 1¥CCZ
nu- 』 叩句『 凶-句 削副司司 pd『 ι E- dd
『 m
ρしW 百