국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	CONTROLLING FOREBODY ASYMMETRIES IN FLIGHT뾇XPERIENCE WITH BOUNDARY LAYER TRANSITION STRIPS
저자	David F. Fisher and Brent R. Cobleigh
Keyword	Boundary layer separation; Boundary layer transition; F-18 aircraft; Flight tests; Forebodies; Pressure distribution; Vortices; X-31 aircraft; Yawing moments
URL	http://www.dfrc.nasa.gov/DTRS/1994/PDF/H-1992.pdf
보고서번호	NASA-TM-4595
발행년도	1994
출처	NASA Dryden Flight Research Center
ABSTRACT	The NASA Dryden Flight Research Center has an ongoing program to investigate aircraft flight characteristics at high angles of attack. As part of this investigation, longitudinal boundary layer transition strips were installed on the F-18 HARV forebody, a preproduction F/A-18 radome with a nose-slice tendency, and the X-31 aircraft forebody and noseboom to reduce asymmetric yawing moments at high angles of attack. The transition strips were effective on the F-18 HARV at angles of attack above 60 deg. On the preproduction F/A-18 radome at an angle of attack near 50 deg the strips were not effective. When the transition strips were installed on the X-31 noseboom, a favorable effect was observed on the yawing moment dynamics but the magnitude of the yawing moments was not decreased.