Experimental study of flow field distribution over a generic cranked double delta wing
| Autor: | Mehdi Eilbeigi, Mohammad Kazem Sobhani, Mojtaba Dehghan Manshadi, Mehrdad Bazaz Zadeh, Mohammad Ali Vaziry |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Leading edge
Delta wing Aerospace Engineering Mechanical engineering 02 engineering and technology 01 natural sciences Cranked double delta wing Vortical flow 010305 fluids & plasmas Physics::Fluid Dynamics Flow separation Washout (aeronautics) 0203 mechanical engineering 0103 physical sciences Horseshoe vortex Motor vehicles. Aeronautics. Astronautics Physics Leading edge shape 020301 aerospace & aeronautics Angle of attack Mechanical Engineering Hot wire TL1-4050 Mechanics Vortex Flow field Wingtip vortices |
| Zdroj: | Chinese Journal of Aeronautics, Vol 29, Iss 5, Pp 1196-1204 (2016) |
| ISSN: | 1000-9361 |
| Popis: | The flow fields over a generic cranked double delta wing were investigated. Pressure and velocity distributions were obtained using a Pitot tube and a hot wire anemometer. Two different leading edge shapes, namely “sharp” and “round”, were applied to the wing. The wing had two sweep angles of 55° and 30°. The experiments were conducted in a closed circuit wind tunnel at velocity 20 m/s and angles of attack of 5°–20° with the step of 5°. The Reynolds number of the model was about 2 × 105 according to the root chord. A dual vortex structure was formed above the wing surface. A pressure drop occurred at the vortex core and the root mean square of the measured velocity increased at the core of the vortices, reflecting the instability of the flow in that region. The magnitude of power spectral density increased strongly in spanwise direction and had the maximum value at the vortex core. By increasing the angle of attack, the pressure drop increased and the vortices became wider; the vortices moved inboard along the wing, and away from the surface; the flow separation was initiated from the outer portion of the wing and developed to its inner part. The vortices of the wing of the sharp leading edge were stronger than those of the round one. |
| Databáze: | OpenAIRE |
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