{"responseHeader":{"status":0,"QTime":7,"params":{"q":"{!q.op=AND}id:\"1875\"","hl":"true","hl.simple.post":"","hl.fragsize":"5000","fq":"!embargo_tdt:[NOW TO *]","hl.fl":"ocr_t","hl.method":"unified","wt":"json","hl.simple.pre":""}},"response":{"numFound":1,"start":0,"docs":[{"modified_tdt":"2012-04-11T00:00:00Z","thumb_s":"/5a/c5/5ac5ecf20814b3d509778c8c5e3006b255a274b5.jpg","oldid_t":"AFRC 1874","setname_s":"uu_afrc","file_s":"/63/12/63128da754e87c7ccc001820f19431d6992a79de.pdf","title_t":"Page 12","ocr_t":"reactivities, as illustrated by the equivalence ratio of the UFL (Figure 5). The ratio of upper to lower flammability limits characterize the reactive difference due to diffusion rates and alternative combustion chemistries for fuels. The ratio of upper to lower explosive limits are, in fact, suggested as an index of flashback tendency of fuels and for the applicability of labyrinthine flare arrestors(5). The larger the UFL/LFL ratio, the greater probability exists that a fuel discharge from a turbulent jet will mix to produce a self-supporting flame. AN EXPERIMENTAL INDEX The volumetric lower heating value, the Wobbe Index and the calculated adiabatic flare temperature have all been reviewed as criteria for characterizing the allowable exit velocity for gas mixtures in open-air turbulent jet diffusion flames. These criteria all were limited in range of applicability. Combining the volumetric lower heating value with aspects of the calculated adiabatic flame temperature and the reactivity of the fuel as indicated by the ratio of upper to lower flam-mabiltiy creates a new criteria of fuel combustibility for open-air turbulent jet diffusion flames. This Experimental Index is expressed as: 5.2.11","restricted_i":0,"id":1875,"created_tdt":"2012-04-11T00:00:00Z","format_t":"application/pdf","parent_i":1892,"_version_":1679953776251764738}]},"highlighting":{"1875":{"ocr_t":[]}}}