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Large eddy simulation in the computation of jet noise
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hayder, M. E. Mankbadi, R. R. Goldstein, M. E. Turkel, E. Povinelli, L. A. |
| Copyright Year | 1999 |
| Description | Noise can be predicted by solving Full (time-dependent) Compressible Navier-Stokes Equation (FCNSE) with computational domain. The fluctuating near field of the jet produces propagating pressure waves that produce far-field sound. The fluctuating flow field as a function of time is needed in order to calculate sound from first principles. Noise can be predicted by solving the full, time-dependent, compressible Navier-Stokes equations with the computational domain extended to far field - but this is not feasible as indicated above. At high Reynolds number of technological interest turbulence has large range of scales. Direct numerical simulations (DNS) can not capture the small scales of turbulence. The large scales are more efficient than the small scales in radiating sound. The emphasize is thus on calculating sound radiated by large scales. |
| File Size | 158592 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19990110630 |
| Archival Resource Key | ark:/13960/t37130q4m |
| Language | English |
| Publisher Date | 1999-09-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics High Reynolds Number Navier-stokes Equation Time Dependence Turbulence Large Eddy Simulation Jet Aircraft Noise Far Fields Flow Distribution Near Fields Elastic Waves Noise Prediction Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
