Measuring Surface Pressures on Rotor Blades Using Pressure-Sensitive Paint
| Autor: | Jim Crafton, William E. Lipford, James W. Gregory, Bradley D. Leighty, A. Neal Watkins, Kyle Z. Goodman |
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| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry Rotor (electric) Acoustics Aerospace Engineering Pressure-sensitive paint Laser 01 natural sciences Pressure sensor 010305 fluids & plasmas law.invention 010309 optics Data acquisition law 0103 physical sciences Flapping Aerospace engineering business Intensity (heat transfer) Wind tunnel |
| Zdroj: | AIAA Journal. 54:206-215 |
| ISSN: | 1533-385X 0001-1452 |
| DOI: | 10.2514/1.j054191 |
| Popis: | This paper will present details of a pressure-sensitive paint system for measuring global surface pressures on rotor blades in simulated forward flight at the 14×22 ft subsonic tunnel at the NASA Langley Research Center. The system was designed to use a pulsed laser as an excitation source and pressure-sensitive paint data were collected using the lifetime-based approach. The higher intensity of the laser allowed pressure-sensitive paint images to be acquired using a single laser pulse, resulting in a collection of images that can be used to determine blade pressure at a specific instant in time. This is extremely important in rotorcraft applications because the blades experience dramatically different flowfields depending on their position. In addition, there can be fluctuations on the blade that vary every cycle due to factors such as lead/lag, flapping, and twisting of the blade. These effects generally preclude the use of phase averaging and thus the need for acquiring the data in a single image pair... |
| Databáze: | OpenAIRE |
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