Effects of Pressure on Flame Structure and Droplet Behaviour of Coaxial Jet Spray Flames(Thermal Engineering)

CoaXial let spray Ilarries of kerosene and oxygen are studied exp ｛／ riment ． ally in the alnbien 亡 prcssure range uf O ． 1 − 1 ． OMPa ． The luminescence spcctra of the flames are mcasulled by spectros ・ copic measurement ， and the flame 亡 emperature is rIleasured by a tw 〔〕 − color methvd ． S〔〕ot pr 〔， duct沁 n regioll and soot vQlu τ ne fraction are rneasured by ！ aser induced incaiidescence ( LII＞． Spect1 ・〔 ) scopic lneusurel 皿 ent resu ！ Ls show bluc chemilumincscencc i【1 け1e combusti 〔，ll reacLio冂 rcgion and soot emissioll i副し 1mlnous 日ame kg observed d ∩ wn 需 tream of the combust め n reacti 〔 )n region 、 CO2 en ' lissiol ［ is alsc 〕 observcd downstream of thc lunninous〔 lame ． The tcmperature measurement results sho 、厚 high − te1ユユ perature regi 〔 )ns near the buTner． The flame temperature decrcases drastically a 玩，ng the ce ；〕tral axis and a Mi1 ユimum temperature point apPears ．． T ］ ris po ｛ nt movcs ups し ream with increase 正 naml 〕ient pressure because vaporization 〔 )f droplets occurs fur亡 her upstream due to the change in droplet dispersion ． LII measurements show that soot concentration increases t川 0， 5MPa alld decreasos above O ， 7MPa ． This lrend agrees with ［ he spectroscopic arld ternperature meusurements ， because the fuel vapor concentration distributions changew 辻h increa ． ge in ambient pressure due to thc changc in droplet dispersio τ 1 and mixing betwcen fuc ' 1 vapor and oXidizer ． These results sh 〔〕w that the drop 正 ot behavior changes with increase in prcssure and affects Hame structure and soot

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An Experimental Study of Coaxial Jet Spray Flame Structure and Soot Formation under High Pressure(Thermal Engineering)

Nishioka

Nakamura

Hayashi

et al. 2010

Trans.JSME, Ser.B

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Effects of Pressure on Flame Structure and Droplet Behaviour of Coaxial Jet Spray Flames(Thermal Engineering)

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An Experimental Study of Coaxial Jet Spray Flame Structure and Soot Formation under High Pressure(Thermal Engineering)

An Experimental Study of Coaxial Jet Spray Flame Structure and Soot Formation under High Pressure(Thermal Engineering)

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