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Usb noise reduction by nozzle and flap modifications
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hayden, R. E. |
| Copyright Year | 1976 |
| Description | The development of concepts for reducing upper surface blown flap noise at the source through flap modifications and special nozzles is reviewed. In particular, recent results obtained on the aerodynamic and acoustic performance of flaps with porous surfaces near the trailing edge and multi-slotted nozzles are reviewed. Considerable reduction (6-10 db) of the characteristic low frequency peak is shown. The aerodynamic performance is compared with conventional systems, and prospects for future improvements are discussed. |
| File Size | 1689068 |
| Page Count | 23 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780016121 |
| Archival Resource Key | ark:/13960/t42r8mn7g |
| Language | English |
| Publisher Date | 1976-01-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Nozzle Design Exhaust Nozzles Noise Reduction Performance Prediction Porosity Powered Lift Aircraft Aerodynamic Characteristics Aeroacoustics Lift Augmentation Upper Surface Blown Flaps Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
