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The variation of slat noise with mach and reynolds numbers
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lockhard, David P. Choudhari, Meelan M. |
| Copyright Year | 2011 |
| Description | The slat noise from the 30P30N high-lift system has been computed using a computational fluid dynamics code in conjunction with a Ffowcs Williams-Hawkings solver. By varying the Mach number from 0.13 to 0.25, the noise was found to vary roughly with the 5th power of the speed. Slight changes in the behavior with directivity angle could easily account for the different speed dependencies reported in the literature. Varying the Reynolds number from 1.4 to 2.4 million resulted in almost no differences, and primarily served to demonstrate the repeatability of the results. However, changing the underlying hybrid Reynolds-averaged-Navier-Stokes/Large-Eddy-Simulation turbulence model significantly altered the mean flow because of changes in the flap separation. However, the general trends observed in both the acoustics and near-field fluctuations were similar for both models. |
| File Size | 2204081 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20110012446 |
| Archival Resource Key | ark:/13960/t0gv0kr2m |
| Language | English |
| Publisher Date | 2011-06-06 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Large Eddy Simulation Ffowcs Williams-hawkings Equation Computational Fluid Dynamics Reynolds Number Reynolds Averaging Near Fields Mach Number Flapping Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
