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Acoustic effects on profile drag of a laminar flow airfoil
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Baals, Robert A. Jones, Michael G. Shearin, John G. |
| Copyright Year | 1987 |
| Description | A two-dimensional laminar flow airfoil (NLF-0414) was subjected to high-intensity sound (pure tones and white noise) over a frequency range of 2 to 5 kHz, while immersed in a flow of 240 ft/sec (Rn of 3 million) in a quiet flow facility. Using a wake-rake, wake dynamic pressures were determined and the deficit in momentum was used to calculate a two dimensional drag coefficient. Significant increases in drag were observed when the airfoil was subjected to the high intensity sound at critical sound frequencies. However, the increased drag was not accompanied by movement of the transition location. |
| File Size | 2869658 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19870020722 |
| Archival Resource Key | ark:/13960/t6m090s0r |
| Language | English |
| Publisher Date | 1987-09-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Airfoil Profiles Drag Laminar Flow Skin Friction Transition Points Reynolds Number Wakes Two Dimensional Flow Dynamic 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 |
