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- Title
SENSITIVITY STUDY OF SONIC BOOM GROUND SIGNATURE USING DIFFERENT AXIAL DISTANCE STEP SIZES FOR EVALUATING NEAR-FIELD OVERPRESSURE.
- Authors
Tamayo, Jacques Gerard; Rocha, Joana
- Abstract
To study the feasibility of supersonic commercial airliners, it is essential to better understand the impact of sonic boom caused by the aircraft. For simplicity, a general supersonic airliner concept by Sun et al. was used to conduct this analysis. Using an aircraft model created using Autodesk’s Fusion 360 CAD program, the effects of the aircraft volume and lift in the nearfield of the aircraft was determined using a custom MATLAB script developed in-house. The near-field overpressure was then propagated using NASA’s PC Boom program to determine the ground signature of the airliner. Furthermore, a sensitivity analysis for the geometric and lift properties was conducted. It was determined that an axial step size of 1.2 m (i.e., the spacing between cross-sectional areas obtained from the 3D model used for the numerical differentiation) yields the best results for creating the full ground signature propagated by PC Boom, and that using this step size also results in better computation times compared to smaller step sizes. It was also observed that smaller step sizes for analysis caused noisier/unfiltered data in the F-Function curve which did not change the accuracy of the overall ground signature propagated by PC Boom. Finally, it was determined that a sufficiently large step-size causes the signature propagated by PC Boom to form a different shape compared to step-sizes less than 1.2 m, which should not be considered.
- Subjects
UNITED States. National Aeronautics &; Space Administration; AUTODESK Inc.; COMPUTER-aided design software; NUMERICAL differentiation; MODEL airplanes; GEOMETRIC analysis; TRANSPORT planes; ALGEBRAIC field theory
- Publication
Canadian Acoustics, 2022, Vol 50, Issue 2, p5
- ISSN
0711-6659
- Publication type
Article