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UID:0-393@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20180214T163000

DTEND;TZID=Asia/Jerusalem:20180214T173000

DTSTAMP:20230527T141037Z

URL:https://aerospace.technion.ac.il/events/the-time-dependent-combustion-
 of-a-gel-fuel-droplet/

SUMMARY:The Time Dependent Combustion of a Gel Fuel Droplet
DESCRIPTION:Lecturer:Arza Hadad\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 Gel fuels are non-Newtonian fluids with a yield stress. In t
 he absence of sufficient shear stress\, the gel has a solid-like behavior.
  Under shear stress the viscosity decreases to allow the atomization and s
 ubsequent vaporization and combustion\, not much unlike the vaporization a
 nd combustion of liquid fuels.\nIn terms of safety\, gel fuels exceed both
  solid and liquid propellants. Moreover\, gel fuels have significant advan
 tages in terms of performance. As in the case of liquid fuels\, the flow r
 ate of a gel fuel to the combustion chamber is controllable. In addition\,
  gel fuels are ideal for energetic additives. Energetic additives\, such a
 s metal particles\, compensate for the loss in energy content due to the a
 ddition of the gellant.\nThe present work deals with the mathematical mode
 ling and numerical simulation of the combustion of a single droplet of gel
  fuel based on organic gellant. Organic-gellant-based gel fuel drops exhib
 it a cyclic combustion mechanism. The process begins with a traditional co
 mbustion\, followed by the formation of an elastic impermeable film of gel
 lant around the droplet. As a result\, vapor fuel bubbles form and expand 
 inside the droplet until the fuel vapors burst through the film. This proc
 ess repeats itself until complete depletion of the fuel and gellant. This 
 behavior occurs because the gel fuel is basically a mixture of species wit
 h very different volatilities: the gellant on one hand and the parent liqu
 id fuel on the other.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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