Loading...
Please wait, while we are loading the content...
Similar Documents
Simulation of jet noise with overflow cfd code and kirchhoff surface integral
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kandula, M. Caimi, R. |
| Copyright Year | 2002 |
| Description | An acoustic prediction capability for supersonic axisymmetric jets was developed on the basis of OVERFLOW Navier-Stokes CFD (Computational Fluid Dynamics) code of NASA Langley Research Center. Reynolds-averaged turbulent stresses in the flow field are modeled with the aid of Spalart-Allmaras one-equation turbulence model. Appropriate acoustic and outflow boundary conditions were implemented to compute time-dependent acoustic pressure in the nonlinear source-field. Based on the specification of acoustic pressure, its temporal and normal derivatives on the Kirchhoff surface, the near-field and the far-field sound pressure levels are computed via Kirchhoff surface integral, with the Kirchhoff surface chosen to enclose the nonlinear sound source region described by the CFD code. The methods are validated by a comparison of the predictions of sound pressure levels with the available data for an axisymmetric turbulent supersonic (Mach 2) perfectly expanded jet. |
| File Size | 6063654 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20020039709 |
| Archival Resource Key | ark:/13960/t1kh5j80m |
| Language | English |
| Publisher Date | 2002-01-01 |
| Access Restriction | Open |
| Subject Keyword | Environment Pollution Navier-stokes Equation Reynolds Stress Supersonic Speed Computational Fluid Dynamics Jet Aircraft Noise Simulation Supersonic Jet Flow Nonlinearity Mathematical Models Sound Pressure Axisymmetric Flow Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
