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UID:0-1512@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20251210T133000

DTEND;TZID=Asia/Jerusalem:20251210T143000

DTSTAMP:20251204T080129Z

URL:https://aerospace.technion.ac.il/events/seminar-slot-2025-12-08/

SUMMARY:Combustion and Mixing of Liquid Hydrocarbon Fuel in a Scramjet Mode
 l Combustor
DESCRIPTION:Lecturer: Joel van der Lee\n Faculty: The Stephen B. Klein Facu
 lty of Aerospace Engineering\n Institute:Technion – Israel Institute of 
 Technology\n Location:Classroom 165\, ground floor\, Library\, Aerospace E
 ng.\n Zoom: https://technion.zoom.us/j/93549691766\n Abstract: This resear
 ch work investigates liquid-fueled scramjet combustion and mixing with a f
 ocus on injection strategy and the development of diagnostics to interroga
 te mixing fields. Reliable characterization of fuel distribution is crucia
 l\, as mixing directly governs the ability to stabilize flames in superson
 ic crossflows.\n\nThe work is divided into two parts. Part I evaluates wal
 l-based injection relative to strut-assisted injection with a backward-swe
 pt strut in a cavity-based combustor. Using qualitative filtered infrared 
 imaging and chemiluminescence diagnostics\, the objective was to assess st
 rut injection as a means of enhancing fuel–air mixing and extending the 
 stability envelope. The results show that strut-assistance promotes latera
 l dispersion of the plume and enables flame stabilization beyond what can 
 be achieved with conventional wall-based injection upstream of the cavity.
 \n\nPart II was carried out in an updated combustor configuration and focu
 ses on the development of a quantitative infrared imaging method tailored 
 to liquid fuels. This approach\, which has not previously been applied to 
 liquid-fueled scramjets\, addresses challenges associated with radiance ab
 sorption and incomplete vaporization. By employing fuel surrogates at redu
 ced enthalpy\, time-averaged path density maps were obtained to characteri
 ze plume penetration\, entrainment into the cavity\, and downstream spread
 ing across multiple strut injection schemes. These mixing measurements wer
 e directly related to combustion experiments\, showing how entrainment cha
 racteristics explain the observed differences in flame holding capability.
 \n\nTogether\, this work demonstrates a novel application of quantitative 
 infrared diagnostics to liquid-fueled systems and systematically evaluates
  fueling strategies\, contributing both methodology and physical insight t
 o the design of advanced liquid-fueled scramjet combustors.\n Details: \n 
CATEGORIES:Seminars,סמינרים
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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TZID:Asia/Jerusalem

X-LIC-LOCATION:Asia/Jerusalem

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DTSTART:20251026T010000

TZOFFSETFROM:+0300

TZOFFSETTO:+0200

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