국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	SR-71 EXPERIMENT ON PROPAGATION OF SONIC BOOMS
저자	Edward A. Haering, Jr
Keyword	F-16XL; Propagation; Sonic boom; SR-71; YO-3A
URL	http://www.dfrc.nasa.gov/DTRS/1996/HTML/DRC-95-32/index.html
보고서번호	DRC-95-32
발행년도	1996
출처	NASA Dryden Flight Research Center
ABSTRACT	A flight experiment was recently conducted at the NASAchr(39)s Dryden Flight Research Center in Edwards, California, using an SR-71, an F-16XL, and a YO-3A airplane to study the propagation of sonic booms. This work is geared toward developing a high-speed civil transport (HSCT) aircraft for operational use early in the next century. At supersonic speeds, an aircraft generates numerous shock waves that emanate from such major components as the nose, canopy, inlets, wings, and vertical tails. These multiple shock waves tend to merge into a strong bow shock and a strong tail shock as they propagate through the atmosphere. At present, supercomputers and wind tunnels are used to predict the structures of these shock waves, but only within a few body lengths of the aircraft. Other computational techniques are then used to determine the propagation and merging of these shock waves down to ground level. To verify and enhance the quality of these computational propagation techniques, a database of sonic-boom measurements at various altitudes was gathered for use by the aerospace industry, universities, and NASA research centers. These organizations will use the enhanced computational techniques in the design of the HSCT. Varying the design of a HSCT could help soften the intensity of sonic booms at ground level.