국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Low-speed Wind Tunnel Tests on a Joined-Wing Aircraft Model with Various Upper-Fin
저자	Akihito IWASAKI, Toshimi FUJITA, Hirotoshi FUJIEDA, NAOTO TAKIZAWA
Keyword	Joined-wing aircraft; Upper-fin; Low-speed wind tunnel tests
URL	http://send.nal.go.jp/send/jpn/dlfile.php3/naltr01169?doctype=7&filetype=20&path0=naltr01169&path1=pdf&path2=naltr01169.pdf
보고서번호	NAL TR-1169
발행년도	1992.7
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	Low-speed wind tunnel tests were conducted on a joined-wing aircraft model with various upper-fin(small wing-like surface fitted on the wing or the horizontal tail).The upper-fin was used to enhance direct side-force control capability.In this case,ed. Reynolds number based on the mean aerodynamic chord was(6.5～6.7)× 105,the angle of attack was varied from 0°to 25°,and the side-slip angle from 0°to15°.The results indicated that the upper-fin acts like a″boundary layer fence″and protects wing tip stall when the upper-fin is installed on the wing.On the other hand,however,the upper-fin produced local flow separation over the wing,and this flow separation caused asymmetric lateral and directional characteristics with side-slip angle.