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Numerical simulation of noise from supersonic jets passing through a rigid duct
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Kandula, Max |
| Copyright Year | 2012 |
| Description | The generation, propagation and radiation of sound from a perfectly expanded Mach 2.5 cold supersonic jet flowing through an enclosed rigid-walled duct with an upstream J-deflector have been numerically simulated with the aid of OVERFLOW Navier-Stokes CFD code. A one-equation turbulence model is considered. While the near-field sound sources are computed by the CFD code, the far-field sound is evaluated by Kirchhoff surface integral formulation. Predictions of the farfield directivity of the OASPL (Overall Sound Pressure Level) agree satisfactorily with the experimental data previously reported by the author. Calculations also suggest that there is significant entrainment of air into the duct, with the mass flow rate of entrained air being about three times the jet exit mass flow rate. |
| File Size | 2486835 |
| Page Count | 10 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20120003165 |
| Archival Resource Key | ark:/13960/t11p3338v |
| Language | English |
| Publisher Date | 2012-01-01 |
| Access Restriction | Open |
| Subject Keyword | Fluid Mechanics And Thermodynamics Rigid Structures Sound Waves Computational Fluid Dynamics Ducts Computerized Simulation Nitrogen Navier-stokes Equation Free Jets Supersonic Speed Mass Flow Rate Kirchhoff Law Turbulence Models Far Fields Supersonic Jet Flow Computational Grids Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
