Results 261 to 270 of about 447,406 (307)

Non-symmetric bi-stable flow around the Ahmed body

International Journal of Heat and Fluid Flow, 2016
Abstract 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).
W. Meile, T. Ladinek, G. Brenn, A. Reppenhagen, A. Fuchs   +4 more
openaire   +3 more sources

Aspect ratio and the dynamic wake of the Ahmed body

Experimental Thermal and Fluid Science, 2022
Abstract The dynamic structures in the wake of the Ahmed body with a 25° slant angle were investigated. It is well established that the wake is dominated by two, counter rotating, streamwise vortex structures (C-pillar vortices). The influence these vortices have on the flow over the slant back was altered by modifying the width of the body between ...
James Venning, Thomas McQueen, David Lo Jacono, David Burton, Mark Thompson, John Sheridan   +5 more
openaire   +3 more sources

Flow structure around a low-drag Ahmed body

Journal of Fluid Mechanics, 2021
Abstract
K. Liu, B.F. Zhang, Y.C. Zhang, Y. Zhou
openaire   +1 more source

Computational Aerodynamics of the Ahmed Model Car Body

Volume 2: Fora, 2006
This study reports aerodynamic computations of a model car body using various turbulence models. Simulation results were compared with data from wind tunnel tests, for two rear slant angles. The results indicate that RSM simulations gave slightly better predictions of the drag coefficient in both cases.
Ayodeji Demuren, Rajat Trehan
openaire   +1 more source

Unsteady flow structures around a high-drag Ahmed body

Journal of Fluid Mechanics, 2015
This work aims to gain a relatively thorough understanding of unsteady predominant coherent structures around an Ahmed body with a slant angle of $25^{\circ }$, corresponding to the high-drag regime. Extensive hot-wire, flow visualization and particle image velocimetry measurements were conducted in a wind tunnel at $\mathit{Re}=(0.45{-}2.4)\times 10^{
B. F. Zhang, Y. Zhou, S. To
openaire   +1 more source

The influence of background turbulence on Ahmed-body wake bistability

Journal of Fluid Mechanics, 2021
The discovery of wake bistability has generated an upsurge in experimental investigations into the wakes of simplified vehicle geometries. Particular focus has centred on the probabilistic switching between two asymmetrical bistable wake states of a square-back Ahmed body; however, the majority of this research has been undertaken in wind tunnels with ...
Burton, D., Wang, S., Tudball Smith, D., Scott, H. N., Crouch, T. N., Thompson, M. C.   +5 more
openaire   +1 more source

Passive flow control on Ahmed body by rear linking tunnels

Journal of Wind Engineering and Industrial Aerodynamics, 2020
Abstract This paper concentrates on the interaction of a car body with the surrounding airflow, in order to provide small changes for reducing vehicle fuel consumption by reducing drag. There are many passive and active methods for this purpose, the main goal of this project is the development of passive drag reduction devices for the simplified ...
Mohammadikalakoo, B., Schito, P., Mani, M.   +2 more
openaire   +2 more sources

Experimental and numerical studies of the flow around the Ahmed body

Wind and Structures, 2013
The present study aims to investigate characteristics of the flow structures around the Ahmed body by using both experimental and numerical methods. Therefore, 1/4 scale Ahmed body having slant angle was employed.
Tunay T., Sahin B., Akilli H.
openaire   +2 more sources

Large eddy simulation of flow around the Ahmed body

2004
The automotive industry has a high demand for reliable simulation methods capable of tackling the complex turbulent air flow around vehicles. The Ahmed reference model is a generic car-type bluff body with a slant back. It is frequently used as a benchmark test case for this kind of flow.
C. Hinterberger, M. García-Villalba, W. Rodi   +2 more
openaire   +1 more source

Active flow control on an Ahmed body - An experimental study

53rd AIAA Aerospace Sciences Meeting, 2015
25 Ahmed model for the purpose of controlling aerodynamics. The application of steady microjet actuators in multiple congurations are investigated through a series of experimental studies. Each arrays’ location is selected to target key ow features, e.g. the slant separation bubble, the trailing wake vortices, and the c-pillar vortices.
Jonathan W. McNally, Farrukh S. Alvi, Nicolas Mazellier, Azeddine Kourta   +3 more
openaire   +1 more source