Noise Exposure Reduction of Advanced High-Lift Systems

摘要

The purpose of NASA Contract NAS1-20090 Task 3 was to investigate the potentialfor noise reduction that would result from improving the high-lift performance of conventional subsonic transports. The study showed that an increase in lift-to-drag ratio of 15 percent would reduce certification noise levels by about 2 EPNdB on approach, 1.5 EPNdB on cutback, and zero EPNdB on sideline. In most cases, noise contour areas would be reduced by 10 to 20 percent.