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UID:0-460@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20170118T163000

DTEND;TZID=Asia/Jerusalem:20170118T173000

DTSTAMP:20230603T190736Z

URL:https://aerospace.technion.ac.il/events/theoretical-investigation-of-j
 et-spray-flames/

SUMMARY:Theoretical Investigation of Jet Spray Flames
DESCRIPTION:Lecturer:Noam Weinberg\n Faculty:Department of Aerospace Engine
 ering\n Institute:Technion – Israel Institute of Technology\n Location:C
 lassroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract
 : \n Details: \n In a jet spray flame a jet of liquid fuel spray emerges f
 rom a small orifice of a burner into a stagnant air environment. The fuel 
 jet entrains air from the surroundings and a mixing layer is formed betwee
 n the evaporating fuel and the oxygen in the air. Under appropriate operat
 ing conditions\, a diffusion flame can be established throughout this mixi
 ng layer. Although jet spray flames are widely used in many engineering ap
 plications\, such as gas turbines\, jet engines and other energy productio
 n systems\, a fundamental theoretical understanding of these flames and th
 eir characteristics has yet to appear in the literature.\nIn the current w
 ork\, a laminar jet polydisperse spray diffusion flame is nalysed mathemat
 ically for the first time using an extension of classical similarity solut
 ions for gaseous jet flames. The analysis enables a comparison to be drawn
  between conditions for flame stability or flame blow-out for purely gaseo
 us flames and for spray flames. It is found that\, in contrast to the Schm
 idt number criteria relevant to gas flames\, droplet size and initial spra
 y polydispersity play a critical role in determining potential flame scena
 rios. Some qualitative agreement for lift-off height is found when compari
 ng predictions of the theory and sparse independent experimental evidence 
 from the literature.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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