Page 96 - konishipaper

theflamewilacelerateforwardinthepremixedgaslayer andcoverthetwinvortices. Theexistenceofthisside- flow structure was fr rst reported by Ros s [6] using a 20 mmwidetray.
1nthis study usingwidertray(10 mm)，figure7 shows the mixing proces betwen the two liquids. There is a big similarity betwe en the velocity profiles obtained企omthemixingoftwoliquidsandthose企om therealflamespreadingexperimentasshowninfigure8.
The LSPT flow visualization technique reveals 2-D velocityprofilesresultingfromintegratinga3-Dvelocity fieldalongthelaserpath. Holographicimaginghas.the c a p a b i l i t y o f 子 D i n s t a n t a n e o u s f1 0 w v i s u a l i z a t i o n ， it c a n beusedasa3-Ddiagnostictolforbothquantitativeand qualitative for spatial ly and temporal ly evolving vortex f10wstmctures.
Figure3LSPTtopviewofmixingiso-'octaneand l-butanolusing5mmwidetray.
.Aplyingtheholographicimagingtechniqueto the f1ame spreading f10w is limited because of the distortionofthereferencebeambytempera印 re叩 d densitygradients. Becauseofthat simulation hold greatpromiseasatoltoeliminatethelimitatiQn of ap plying the holography to visualize the 3-D f10w paternsaheadoftheflame. Simulating the 自ame- spread-heat-仕ansfermechanismis thewayto replace thehightransientvelocityprofilesaheadofthef1ame with stationary one. This wi1I enable us to ap ply the holography3-D-f1owvisualizationsucesfuIyinthe comingfuture.
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