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UID:0-255@aerospace.technion.ac.il

DTSTART;TZID=Asia/Jerusalem:20210519T163000

DTEND;TZID=Asia/Jerusalem:20210519T173000

DTSTAMP:20230525T061918Z

URL:https://aerospace.technion.ac.il/events/asymptotic-theory-of-grid-fins
 /

SUMMARY:Asymptotic theory of grid fins
DESCRIPTION:Lecturer:Guy Levi\n Faculty:Department of Aerospace Engineering
 \n Institute:Technion – Israel Institute of Technology\n Location:https:
 //technion.zoom.us/j/92132513390\n Zoom: \n Abstract: \n Details: \n Grid 
 fins are actually an array of short lifting surfaces arranged in a lattice
 . They appeared in engineering literature in the late eighties of the last
  century\, but they have probably been used in Russian military since late
  seventies. Notable current applications of these fins are found with the 
 Falcon 9 launch vehicle\, Soyuz ground escape capsule\, and gliding weapon
 s. Notwithstanding their high drag\, they represent a viable alternative t
 o conventional fins because they fold easily\, have small hinge moment (be
 cause of their short chord length)\, are easy to manufacture\, and have hi
 gh strength to weight ratio.\nIn this study we develop an analytical aerod
 ynamic theory of grid fins in subsonic flow. The solution is based on a nu
 mber of small parameters of the problem\, the most conspicuous of which ar
 e the ratio of the fin chord to its span\, and the reciprocal of the numbe
 r of the fin’s lifting surfaces. It is shown that even in the leading or
 der approximation\, the theory fits well both numerical simulations based 
 on the vortex lattice method and the available experimental data.\nZoom Me
 eting
CATEGORIES:Seminars
LOCATION:https://technion.zoom.us/j/92132513390

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