국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	DETERMINATION OF SUN ANGLES FOR OBSERVATIONS OF SHOCK WAVES ON ATRANSPORT AIRCRAFT
저자	David F. Fisher, Edward A. Haering, Jr., Gregory K. Noffz and Juan I. Aguilar
Keyword	Flight test; Flow visualization; GPS; L-1011 aircraft; Shadowgraph; Shock waves
URL	http://www.dfrc.nasa.gov/DTRS/1998/PDF/H-2251.pdf
보고서번호	NASA-TM-1998-206551
발행년도	1998
출처	NASA Dryden Flight Research Center
ABSTRACT	Wing compression shock shadowgraphs were observed on two flights during banked turns of an L-1011 aircraft at a Mach number of 0.85 and an altitude of 35,000 ft (10,700 m). Photos and video recording of the shadowgraphs were taken during the flights to document the shadowgraphs. Bright sunlight on the aircraft was required. The time of day, aircraft position, speed and attitudes were recorded to determine the sun azimuth and elevation relative to the wing quarter chordline when the shadowgraphs were visible. Sun elevation and azimuth angles were documented for which the wing compression shock shadowgraphs were visible. The shadowgraph was observed for high to low elevation angles relative to the wing, but for best results high sun angles relative to the wing are desired. The procedures and equations to determine the sun azimuth and elevation angle with respect to the quarter chordline is included in the Appendix.