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UID:0-457@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20170130T163000

DTEND;TZID=Asia/Jerusalem:20170130T173000

DTSTAMP:20230603T190640Z

URL:https://aerospace.technion.ac.il/events/feasibility-studies-for-early-
 start-of-a-ramjet-engine-intake-by-flow-bleed/

SUMMARY:Feasibility Studies for Early Start of a Ramjet Engine Intake by Fl
 ow Bleed
DESCRIPTION:Lecturer:Alina Novikov\n Faculty:Department of Aerospace Engine
 ering\n Institute:Technion – Israel Institute of Technology\n Location:C
 lassroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstract
 : \n Details: \n The research deals with the feasibility of an early start
  of a ramjet air intake using CFD analysis. For this purpose\, a two-dimen
 sional air inlet geometry with six (6) holes located on the compression su
 rface (the lower wall of the intake) was chosen. A relatively large amount
  of mass flow has been sucked through these holes in order to compensate f
 or the spillage flow\, and obtain an early start. The particular intake ge
 ometry was designed for a flight Mach number of M=2.7. In order to start t
 his intake (swallow the ‘normal shock wave’ by acceleration\, the vehi
 cle had to be accelerated up to M=4.6. Once the intake started\, the vehic
 le could be decelerated to the design conditions. Only at M=2.6 the norm
 al shock wave was thrown out\, and the intake turned into an unstarted con
 dition.\nThe study included CFD simulations at four different flight Mach 
 numbers: 2.4\, 2.6\, 2.8 and 3.0 respectively. The starting condition of e
 ach simulation was the original geometry of the intake with no open holes.
  The number of open holes was sequentially increased at each step until al
 l the six holes were opened. When all six holes were open the intake start
 ed at all four Mach numbers. However\, when closing the holes one at a tim
 e\, and returning to the original configuration\, the intake remained star
 ted for the cases of M=2.8 and M=3.0 but the normal shock was re-expelled
  to the front of the intake (unstarted intake) for the M=2.6 and M=2.4 cas
 es.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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