OCR Text |
Show 4-2 f(esult and I>iscussion 4-2-1 Onset Aspects (1) f(esponse time 1 0 1lhe foam combustion burner needs just 5 seconds for ignition and it is much quicker than the evaporation combustio~ 11oreover the foam combustion shorten the time for stable combustion, one third of the evaporation combustio~ (2) C 0 genera t i on e 600~--~----~-----r----1 F~ ~~ti~oo~ ____ --~ + ----~ ", / t . / Evaporati on ConDustloo / a 2 0 0 / O~--~----~----~----~ 5 1 0 1 5 2 0 Time after Ignition (m in) Fi~8 Response time 10~--~----~----~----, J\s specific surface area of fuel expand, _ evaporation of fuel and mixing of fuel and air increase markedly. Because of the Quick response and mixing, sum of COgeneration decrease one tenth of the evaporation combustio~ (3) llnburnt hydrocarbon (Aldehide) J\ s we 11 as C 0 genera t i on, the concentration of the Aldehide decrease remarkedly, one fifth of the evaporation combustio~ J\nd time of generation is shorter than the evaporation combustio~ V> ~ -o u '\. o u c: c ~ c CI) c..> c: c u 5 ,/ .. ~ E.vap/ora tion Calbustloo Foam Coabus~ .. I ~ " OL---~--~~----~----~ 5 1 0 1 5 2 0 Time after Ignition (m in) Fig.9 COgeneration 30~--~----~-----r----1 2 0 (\ I \ Evaporation Cartlustion 10 I .(' Coa'bus t i on \ .... 1 0 1 5 2 0 Time after Igniti on (m i n ) Fig. 10 Unburnt hydorocarbon (Aldehide) |