Airframe Noise Simulations of a Full-Scale Aircraft
| Autor: | Ehab Fares, Jason Appelbaum, Benjamin M. Duda, Mehdi R. Khorrami |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
business.industry
Computer science Lattice Boltzmann methods Reynolds number Solver 01 natural sciences Flight test 010305 fluids & plasmas 010101 applied mathematics Noise symbols.namesake Mach number 0103 physical sciences Airframe symbols 0101 mathematics Aerospace engineering business Landing gear |
| Zdroj: | 2018 AIAA/CEAS Aeroacoustics Conference. |
| DOI: | 10.2514/6.2018-2973 |
| Popis: | Computational results for a full-scale simulation of a Gulfstream G-III aircraft are presented. In support of a NASA airframe noise flight test campaign, Exa Corporation’s lattice Boltzmann PowerFLOW® solver was used to perform time-accurate simulations of the flow around a highly detailed, full-scale aircraft model. Free-air boundary conditions were used at a Mach number of 0.23 and a Reynolds number of 10.5 × 10(exp 6) based on mean aerodynamic chord. This paper documents the simulation campaign for the baseline aircraft configuration at several flight conditions, including multiple flap deflections and main landing gear deployed or retracted. The high-fidelity, synthetic data were post-processed using a Ffowcs-Williams and Hawkings integral approach to estimate farfield acoustic behavior, with pressures on the model solid surface or a permeable surface enveloping the acoustic near field used as input. The numerical approach, simulation attributes, and the effects of grid resolution, gear deployment, and multiple flap deflections, are discussed as well. |
| Databáze: | OpenAIRE |
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