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UID:0-1179@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20250908T133000

DTEND;TZID=Asia/Jerusalem:20250908T143000

DTSTAMP:20250831T110952Z

URL:https://aerospace.technion.ac.il/events/experimental-investigation-of-
 a-solid-fuel-ramjet-projectile/

SUMMARY:Experimental Investigation of a Solid Fuel Ramjet Projectile
DESCRIPTION:Lecturer:Itamar Levitan\n Faculty:The Stephen B. Klein Faculty 
 of Aerospace Engineering\n Institute:Technion – Israel Institute of Tech
 nology\n Location:Classroom 165\, ground floor\, Library\, Aerospace Eng.\
 n Zoom: https://technion.zoom.us/j/93549691766\n Abstract: \n\n\nSolid Fue
 l Ramjet (SFRJ) is considered for active propulsion to increase the range 
 of gun-launched projectiles\, demonstrating high Specific Impulse (Isp)\, 
 natural ability to sustain ballistic (pseudovacuum) trajectory in varying 
 atmospheric conditions\, and to some extent balance wind deviations.\nIn t
 his work experimental investigation of an SFRJ motor was carried out\, con
 sidering a 76 mm projectile flying at 930 m/s (Mach 2.73 at sea level) as 
 a reference\, with a fuel grain length of 17 cm without a mixing chamber. 
 Using static firing tests\, different fuels were considered with HTPB and 
 polyester as baseline fuels. For additives we’ve used normal and expanda
 ble graphite (EG)\, metals such as aluminum and magnesium\, and PTFE (Tefl
 on).\nIt was found that HTPB-based fuels give substantially higher energet
 ic performance than polyester. Magnesium and aluminum additives increase t
 he thrust\, but the latter exhibits lower combustion efficiency. When addi
 ng PTFE\, aluminized fuel efficiency increases. Expandable graphite additi
 ves reveal enhanced fuel regression rate by up to 60%\, implying higher th
 rust. The desired thrust-equal-drag conditions (for a pseudovacuum traject
 ory) can be approached with an inlet airflow rate of 1.45 kg/s and appropr
 iate combinations of fuels and additives.\n\n\n\n Details: \n 
CATEGORIES:Seminars,סמינרים
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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