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- Title
A Maneuvering Flight Noise Model for Helicopter Mission Planning.
- Authors
Greenwood, Eric; Rau, Robert
- Abstract
A new model for estimating the noise radiation during maneuvering flight is developed in this paper. The model applies the quasi-static acoustic mapping (Q-SAM) method to a database of acoustic spheres generated using the fundamental rotorcraft acoustics modeling from experiments (FRAME) technique. A method is developed to generate a realistic flight trajectory from a limited set of waypoints and is used to calculate the quasi-static operating condition and corresponding acoustic sphere for the vehicle throughout the maneuver. By using a previously computed database of acoustic spheres, the acoustic impact of proposed helicopter operations can be rapidly predicted for use in mission planning. The resulting FRAME-QS model is applied to near-horizon noise measurements collected for the Bell 430 helicopter undergoing transient pitch-up and roll maneuvers, with good agreement between the measured data and the FRAME-QS model.
- Subjects
SPACE trajectories; FLIGHT; NOISE measurement; ROTORCRAFT; HELICOPTERS; BELL helicopters; NOISE; ACOUSTICS
- Publication
Journal of the American Helicopter Society, 2020, Vol 65, Issue 2, p1
- ISSN
0002-8711
- Publication type
Article
- DOI
10.4050/JAHS.65.022007