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UID:0-361@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20181022T163000

DTEND;TZID=Asia/Jerusalem:20181022T173000

DTSTAMP:20230527T135635Z

URL:https://aerospace.technion.ac.il/events/leading-edge-vortex-as-a-high-
 lift-mechanism-for-large-aspect-ratio-wings/

SUMMARY:Leading-Edge Vortex as a High Lift Mechanism for Large Aspect Ratio
  Wings
DESCRIPTION:Lecturer:Hadar Ben-Gida\n Faculty:Department of Aerospace Engin
 eering\n Institute:Technion – Israel Institute of Technology\n Location:
 Classroom 165\, ground floor\, Library\, Aerospace Eng.\n Zoom: \n Abstrac
 t: \n Details: \n A stationary Leading-Edge-Vortex (LEV) formed over the u
 pper wing surface is one of the primary mechanisms to achieve high lift fo
 rce on wings. While most applications of LEVs have utilized the phenomenon
  to enhance the lift of slender wings\, evidence in nature suggests that s
 tationary LEVs can also exist on high aspect ratio (AR) wings.\nThis study
  investigates the analytical potential flow modeling of a stationary LEV a
 bove a high AR wing for lift enhancement. The main objective of this resea
 rch is to study and characterize the phenomenon for designing large AR win
 gs with high lift due to the LEV.\nThe novelty of the flow model we develo
 ped is in the three-dimensional aspects of the LEV\, which are considered 
 in two ways:\n\n\n 	satisfying conservation of mass and vorticity within t
 he LEV core\;\n 	using a combination of both the strip theory and the lift
 ing-line theory\, in order to account for the effect of the wing shape and
  induced flow on the formation of a stationary LEV.\n\nOur pseudo-three-di
 mensional flow model is studied for several wing configurations\, in order
  to evaluate the resulting LEV characteristics and aerodynamics coefficien
 ts. Our results shed extensive insight on the physical mechanisms responsi
 ble for generating and maintaining a stationary LEV structure on a non-sle
 nder wing. The wing planform shape and sweep are shown to have a major rol
 e in determining the characteristics of the LEV- which can result in signi
 ficant lift enhancement of over 70% for a given planform. The flow model c
 an serve as a preliminary tool in designing new high AR wings that utilize
  the stationary LEV phenomenon to improve performance at high angles of at
 tack.
CATEGORIES:Seminars
LOCATION:Classroom 165\, ground floor\, Library\, Aerospace Eng.

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