국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Aerodynamic characteristics of a NLF airfoil section (NLAM78) with and without suction at low speeds
저자	Masaaki SANO, Kiyomichi ISHIDA, Kazuyuki MIHO, Yoji ISHIDA, Masayoshi NOGUCHI
Keyword	NLF airfoil; drag reduction; suction
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltm0000761.pdf?id=NALTM0000761
보고서번호	NAL-TM-761
발행년도	2001-10
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	Wind tunnel tests have been executed to investigate the low speed aerodynamic characteristics of a natural laminar flow (NLF) airfoil, NLAM78. The NLAM78 was originally designed as a transonic NLF airfoil with the design Mach number of 0.78 whose aerodynamic characteristics for Mach numbers between 0.6 and 0.85 were reported in references 1 and 2. Lift and drag coefficients as well as surface pressure distribution were measured at wind velocities V∞ of 20,40 and 60m/s for various angles of attack. The characteristics of NLF airfoil were also weakly observed at low speeds. We also conducted suction tests under almost the same conditions as non-suction ones, which verified large drag reduction for almost all test conditions.