국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	LANDING APPROACH AIRFRAME NOISE MEASUREMENTS AND ANALYSIS
저자	P. L. Lasagna, K. G. Mackall, F. W. Burcham, Jr. and T. W. Putnam
Keyword	Aircraft landing; Aircraft noise; Airframes; Approach; Noise measurement.
URL	http://www.dfrc.nasa.gov/DTRS/1980/PDF/H-1075.pdf
보고서번호	NASA-TP-1602
발행년도	1980
출처	NASA Dryden Flight Research Center
ABSTRACT	Flyover measurements of the airframe noise produced by the AeroCommander, JetStar, CV-990, and B-747 airplanes are presented for various landing approach configurations. Empirical and semiempirical techniques are presented to correlate the measured airframe noise with airplane design and aerodynamic parameters. Airframe noise for the jet-powered airplanes in the clean configuration (flaps and gear retracted) was found to be adequately represented by a function of airplane weight and the fifth power of airspeed. Results show the airframe noise for all four aircraft in the landing configuration (flaps extended and gear down) also varied with the fifth power of airspeed, but this noise level could not be represented by the addition of a constant to the equation for clean-configuration airframe noise.