국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	SUBSONIC TESTS OF AN ALL-FLUSH-PRESSURE-ORIFICE AIR DATA SYSTEM
저자	T. J. Larson and P. M. Siemers, III
Keyword	Air data systems; Airspeed; Flight tests; Orifices; Pressure distribution.
URL	http://www.dfrc.nasa.gov/DTRS/1980/PDF/H-1122.pdf
보고서번호	NASA-TP-1871
발행년도	1980
출처	NASA Dryden Flight Research Center
ABSTRACT	The use of an all-flush-pressure-orifice array as a subsonic air data system was evaluated in flight and wind tunnel tests. Two orifice configurations were investigated. Both used orifices arranged in a cruciform pattern on the airplane nose. One configuration also used orifices on the sides of the fuselage for a source of static pressure. The all-nose-orifice configuration was similar to the shuttle entry air data system (SEADS). The flight data were obtained with a KC-135A airplane. The wind tunnel data were acquired with a 0.035-scale model of the KC-135A airplane. With proper calibration, several orifices on the vertical centerline of the vehiclechr(39)s nose were found to be satisfactory for the determination of total pressure and angle of attack. Angle of sideslip could be accurately determined from pressure measurements made on the horizontal centerline of the aircraft. Orifice pairs were also found that provided pressure ratio relationships suitable for the determination of Mach number. The accuracy that can be expected for the air data determined with SEADS during subsonic orbiter flight is indicated.