Loading...
Please wait, while we are loading the content...
Similar Documents
Numerical simulation of noise propagation in jet engine ducts
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bittner, E. C. Baumeister, K. J. |
| Copyright Year | 1973 |
| Description | A finite difference formulation is presented which is useful in the study of acoustically treated inlet and exhaust ducts used in turbofan engines. The difference formulation can readily handle acoustic flow field complications, such as axial variations in wall impedance and cross-sectional area, that would occur in a sonic inlet. In formulating the difference solutions, the continuous acoustic field is lumped into a series of grid points spread uniformly throughout the field. At each point, the pressure is separated into its real and imaginary terms. Example solutions are presented for sound propagation in a one-dimensional straight hard-wall duct and in a two-dimensional straight soft-wall duct without steady flow. |
| File Size | 1487520 |
| Page Count | 50 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19730025011 |
| Archival Resource Key | ark:/13960/t9r25qc09 |
| Language | English |
| Publisher Date | 1973-10-01 |
| Access Restriction | Open |
| Subject Keyword | Propulsion Systems Noise Propagation Ducted Flow Acoustic Properties Exhaust Nozzles Finite Difference Theory Ducted Fan Engines Inlet Nozzles Turbofan Engines Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
