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UID:0-433@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20170614T163000

DTEND;TZID=Asia/Jerusalem:20170614T173000

DTSTAMP:20230530T181013Z

URL:https://aerospace.technion.ac.il/events/an-investigation-of-water-in-f
 uel-emulsion-spray-combustion/

SUMMARY:An Investigation of Water-in-Fuel Emulsion Spray Combustion
DESCRIPTION:Lecturer:Neta Yokev\n Faculty:Department of Aerospace Engineeri
 ng\n Institute:Technion – Israel Institute of Technology\n Location:Clas
 sroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract: \
 n Details: \n Of the many ideas being considered to attempt to meet the st
 rict standards dictated by protocols to reduce harmful NOx and PM emission
 s to the atmosphere is the use of water-in-fuel emulsions (WIFE). The curr
 ent research addresses the combustion of a spray of droplets that are comp
 rised of two immiscible fluids components viz. water and fuel\, with the w
 ater being contained within an outer liquid shell of fuel. The fuel and wa
 ter evaporate sequentially. By strategically placing the fluid with higher
  volatility and latent heat of vaporization at the core a phenomenon calle
 d micro-explosion may be induced (under appropriate operating conditions)\
 , in which smaller fuel droplets are produced. Two main benefits accrue to
  the process of combustion by using WIFE sprays: (a) a reduction in the co
 mbustion temperature\, thereby reducing harmful emissions\, and (b) an inc
 rease in fuel efficiency\, by creating a second mechanism of atomization.\
 nA model is presented for a one-dimensional laminar premixed flame\, propa
 gating into a rich\, off-stoichiometric\, fresh homogenous mixture of wate
 r-in-fuel emulsion spray\, with air and inert gas. The two main purposes o
 f this thesis is to investigate the effect of initial water content and to
 tal liquid droplet loading on the (a) steady-state velocity of the propaga
 ting flame and burnt temperature\, and (b) the cellular and pulsating stab
 ility limits of such flames. The influence of the micro-explosion of the s
 pray’s droplets on the flame’s characteristics will be highlighted for
  the first time.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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DTSTART:20170324T030000

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