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Interim prediction method for externally blown flap noise
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Dorsch, R. G. Clark, B. J. Reshotko, M. |
| Copyright Year | 1975 |
| Description | An interim procedure for predicting externally blown flap (EBF) noise spectra anywhere below a powered lift aircraft is presented. Both engine-under-the-wing and engine-over-the-wing EBF systems are included. The method uses data correlations for the overall sound pressure level based on nozzle exit area and exhaust velocity along with OASPL directivity curves and normalized one-third-octave spectra. Aircraft motion effects are included by taking into account the relative motion of the source with respect to the observer and the relative velocity effects on source strength. |
| File Size | 2454125 |
| Page Count | 52 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19750022103 |
| Archival Resource Key | ark:/13960/t11p2vv12 |
| Language | English |
| Publisher Date | 1975-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Externally Blown Flaps Exhaust Velocity Velocity Distribution Prediction Analysis Techniques Data Correlation Noise Spectra Sound Pressure 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 |
