Numerical investigation of a realistic nose landing gear
2014 (English)In: 20th AIAA/CEAS Aeroacoustics Conference, American Institute of Aeronautics and Astronautics, 2014Conference paper (Other academic)
A hybrid approach is used to study the noise generated by a realistic full-scale nose land- ing gear configuration. Compressible Detached-Eddy Simulations are performed to com- pute the flow field and the far-field noise is evaluated with the Ffowcs Williams-Hawkings acoustic analogy. Preliminary Reynolds-Averaged Navier-Stokes simulations are performed to evaluate the sensitivity of the steady solution to the computational grid. It is found that mesh independence is not obtained with the grids considered, although the agreement between the medium and fine grids is reasonable. The time-dependent solution obtained via DES is examined and the main noise sources on the gear surfaces are identified. The power spectral density of pressure uctuations on the tyre surface is found to be rather broadband on the noisier sides of the tyre, while distinct humps and a sharp peak near 1kHz are identified in the quieter regions of the tyre. This sharp peak is observed again in the far-field noise. Further work is needed to clarify the cause of this peak. Its frequency is too high to link it with shedding from a gear component, although it could be associated with unsteadiness near the tyre corner.
Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2014.
Acoustic noise, Landing gear (aircraft), Power spectral density, Tires, Computational grids, Detached eddy simulations, Gear configurations, Mesh independence, Nose landing gear, Numerical investigations, Reynolds-averaged navier-stokes simulations, Time-dependent solutions
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-159511DOI: 10.2514/6.2014-2077ScopusID: 2-s2.0-84903900413ISBN: 978-162410285-1OAI: oai:DiVA.org:kth-159511DiVA: diva2:785402
20th AIAA/CEAS Aeroacoustics Conference, Atlanta, GA, United States, 16-20 June 2014
QC 201502092015-02-022015-02-022016-04-15Bibliographically approved