Projects per year
The flow around the Ahmed body at varying Reynolds numbers under yawing conditions is investigated experimentally. The body geometry belongs to a regime subject to spanwise flow instability identified in symmetric flow by Cadot and co-workers (Grandemange et al., 2013b). Our experiments cover the two slant angles 25° and 35° and Reynolds numbers up to 2.784 × 106. Special emphasis lies on the aerodynamics under side wind influence. For the 35° slant angle, forces and moments change significantly with the yawing angle in the range 10° ≤ |β| ≤ 15°. The lift and the pitching moment exhibit strong fluctuations due to bi-stable flow around a critical angle β of ±12.5°, where the pitching moment changes sign. Time series of the forces and moments are studied and explained by PIV measurements in the flow field near the rear of the body.
|Journal||International Journal of Heat and Fluid Flow|
|Publication status||Published - 2016|
Fields of Expertise
- Mobility & Production
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- 1 Finished
Aerodynamik von Kraftfahrzeuge - Automobile Aerodynamics
Brenn, G., Hörmann, T. & Meile, W.
1/08/06 → 31/01/09
Project: Research project