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UID:0-465@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20160817T163000

DTEND;TZID=Asia/Jerusalem:20160817T173000

DTSTAMP:20230603T191058Z

URL:https://aerospace.technion.ac.il/events/the-impact-of-reactants-compos
 ition-on-the-flow-structure-in-wake-stabilized-premixed-flames-mechanism-a
 nd-scaling/

SUMMARY:The Impact of Reactants Composition on the Flow Structure in Wake S
 tabilized Premixed Flames\; Mechanism and Scaling
DESCRIPTION:Lecturer:Dan Michaels\n Faculty:Reacting Gas Dynamics Lab\, Dep
 artment of Mechanical Engineering\,\n Institute:Massachusetts Institute of
  Technology\n Location:Classroom 165\, ground floor\, Library\, Aerospace 
 Eng.\n Zoom: \n Abstract: \n Details: \n A major challenge for advanced pr
 opulsion and combustion technologies is obtaining stable combustion with a
  wide range of reactant compositions and temperatures. Being able to predi
 ct the combustion stability\, flow structure and flame location based on a
  distinctive property of the reactants would be extremely valuable. Recent
  experimental measurements in two different combustor geometries showed th
 at both the flow structure and stability map collapse using the flame exti
 nction strain rate or strained consumption speed. In the present study\, t
 he origin of those results is investigated using detailed numerical simula
 tions of wake stabilized laminar lean premixed flames with a wide range of
  reactants compositions and temperatures. The results reveal the underlyin
 g feedback mechanism between the flame and the flow field. The analysis sh
 ows the significant impact of the flame response to stretch on flame stabi
 lization and associated flow structure. Capturing similar scaling of the c
 haracteristic chemical and flow time scales in both turbulent and laminar 
 premixed flames indicates that the findings have a fundamental origin. The
  findings can be extremely useful for other combustors in which the combus
 tion instabilities originate from the flame-vortex interaction and there i
 s a need to operate with different fuels and inlet conditions.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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DTSTART:20160325T030000

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