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Acoustic source location in a jet-blown flap using a cross-correlation technique
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Maus, J. R. Becker, R. S. |
| Copyright Year | 1977 |
| Description | The acoustic source strength distribution in a turbulent flow field was measured for two far field microphones at 45 deg above and below the plane of the flap surface. A processed signal from an inclined hot-film anemometry probe was cross correlated with the signal from the appropriate far field microphone. The contribution made by the sources associated with the fluctuating pressure on the flap surface to the sound received at far field microphone was estimated by cross correlating the processed signals of microphones which were embedded in the flap surface with the far field microphone signals. In addition, detailed fluid dynamic measurements were made in the flow field of the jet flap using dual sensor hot-film anemometry probes. |
| File Size | 8869758 |
| Page Count | 176 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19770010886 |
| Archival Resource Key | ark:/13960/t1qg3h53f |
| Language | English |
| Publisher Date | 1977-02-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Acoustic Measurement Noise Reduction Aircraft Noise Cross Correlation Flow Distribution Short Takeoff Aircraft Jet Flaps Hot-film Anemometers Microphones 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 |
