An Experimental Study of the Unsteady Wake of an Eppler-361 Airfoil
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Bibliographic record
Abstract
A number of experimental measurements are carried out to study the unsteady wake of a pitching Eppler-361 airfoil. The flow field in the wake was measured by a hot-wire anemometry at the downstream distance from trailing edge of 0.25 chord. All data were taken at the mean angle of attack of 2.5 deg and the reduced frequency of 0.1. The amplitude of oscillations was varied from 8 to 15 degrees. The variation of instantaneous velocity in one cycle of oscillation for several vertical positions in the wake is investigated. Three different wake structures are found when the airfoil oscillates below the static stall angle. However, when the amplitude of oscillations is 15 deg (i.e., beyond the static stall), the wake structure appears to be the same in all positions. Therefore, it is concluded that the flow undergoes a large separation that covers the most parts of the wake. The effects of amplitude of pitching oscillations on the wake thickness and linear momentum defect are studied.
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Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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