Loading...
Please wait, while we are loading the content...
Similar Documents
Prediction of aircraft sideline noise attenuation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zorumski, W. E. |
| Copyright Year | 1978 |
| Description | A computational study is made using the recommended ground effect theory by Pao, Wenzel, and Oncley. It is shown that this theory adequately predicts the measured ground attenuation data by Parkin and Scholes, which is the only available large data set. It is also shown, however, that the ground effect theory does not predict the measured lateral attenuations from actual aircraft flyovers. There remain one or more important lateral effects on aircraft noise, such as sideline shielding of sources, which must be incorporated in the prediction methods. Experiments at low elevation angles (0 deg to 10 deg) and low-to-intermediate frequencies are recommended to further validate the ground effect theory. |
| File Size | 3289702 |
| Page Count | 52 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780019928 |
| Archival Resource Key | ark:/13960/t3324r53j |
| Language | English |
| Publisher Date | 1978-06-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Horizontal Flight Sound Waves Noise Reduction Aircraft Noise Pressure Distribution Ground Effect Aerodynamics Prediction Analysis Techniques Wave Reflection 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 |
