Correlation of Aerodynamic Force Measurements in MIRA and Other Automotive Wind Tunnels

1982 ◽  
Author(s):  
G. W. Carr
Keyword(s):  
Aerodynamic Force ◽  
Wind Tunnels ◽  
Force Measurements

Aerodynamic Forces on a Simplified Car Body: Towards Innovative Designs for Car Drag Reduction

2010 ◽  
Author(s):  
Mahmoud Khaled ◽  
Fabien Harambat ◽  
Anthony Yammine ◽  
Hassan Peerhossaini
Keyword(s):  
Drag Reduction ◽  
Drag Coefficient ◽  
Aerodynamic Drag ◽  
Cooling System ◽  
Aerodynamic Force ◽  
Lift Coefficient ◽  
Force Measurements ◽  
Vehicle Model ◽  
Aerodynamic Forces ◽  
Aerodynamic Drag Reduction

The present paper exposes the study of the cooling system circulation effect on the external aerodynamic forces. We report here aerodynamic force measurements carried out on a simplified vehicle model in wind tunnel. Tests are performed for different airflow configurations in order to detect the parameters that can affect the aerodynamic torsor and to confirm others previously suspected, especially the air inlets localization, the air outlet distributions and the underhood geometry. The simplified model has flat and flexible air inlets and several types of air outlet, and includes in its body a real cooling system and a simplified engine block that can move in the longitudinal and lateral directions. The results of this research are generic and can be applied to any new car design. Results show configurations in which, with respect to the most commonly adopted underhood geometries, the overall drag coefficient can be decreased by 2%, the aerodynamic cooling drag coefficient by more than 50% and the lift coefficient by 5%. Finally, new designs of aerodynamic drag reduction, based on the combined effects of the different investigated parameters, are proposed.

The Impact of the Model Support Design on the Flow Field of Supersonic Wind Tunnels

2017 ◽  
Vol 871 ◽  
pp. 193-198
Author(s):  
Michael Steppert ◽  
Philipp Epple ◽  
Michael Steber
Keyword(s):  
Total Pressure ◽  
Measured Data ◽  
Wind Tunnels ◽  
Force Measurements ◽  
Support Design ◽  
Supersonic Wind Tunnel ◽  
Schlieren Photography ◽  
The Impact ◽  
Full Factorial ◽  
Model Support

For the most supersonic wind tunnel applications, the model is mounted on a support system in the test section. For test applications, like schlieren photography or drag force measurements, it is important that the influence of the model support on the measurements is as negligible as possible. To investigate the impact of the model support design on the measured data, four fundamental designs were investigated and combined by a full factorial design process. For this purpose, the force acting on the model plus the model support and the total pressure curves were investigated and analyzed. These results are presented in detail in this work.

Morphology Effects of Leading-edge Serrations on Aerodynamic Force Production: An Integrated Study Using PIV and Force Measurements

2018 ◽  
Vol 15 (4) ◽  
pp. 661-672 ◽  
Author(s):  
Teruaki Ikeda ◽  
Tetsuya Ueda ◽  
Toshiyuki Nakata ◽  
Ryusuke Noda ◽  
Hiroto Tanaka ◽  
...  
Keyword(s):  
Aerodynamic Force ◽  
Force Production ◽  
Leading Edge ◽  
Force Measurements ◽  
Integrated Study

Stereo three-dimensional particle image velocimetry measurement and aerodynamic force analysis of non-spinning soccer balls

2020 ◽  
Vol 234 (2) ◽  
pp. 146-153 ◽  
Author(s):  
Masaki Hiratsuka ◽  
Shinichiro Ito ◽  
Keita Miyasaka ◽  
Akihisa Konno
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Aerodynamic Force ◽  
Three Dimensional ◽  
Jet Flow ◽  
Flight Path ◽  
Wake Flow ◽  
Force Measurements ◽  
Flow Measurements ◽  
Image Velocimetry

A knuckle shot, resulting from non-spinning kicking, is an essential technique in soccer. The irregular flight path of the knuckle shot is caused by the aerodynamic force from the three-dimensional twin vortices generated in the wake behind the ball. However, the detailed behavior of the twin vortices and relation between the jet flow and the acting forces on the balls is still not understood. In addition, a more thorough understanding of the effect of ball panels on the formation of twin vortices and jet flow is important to develop balls with high controllability. To study the effect of the ball panel shape on the flight path, stereo three-dimensional particle image velocimetry wake flow measurements and synchronized force measurements were performed on various soccer balls. It was confirmed that the aerodynamic force on the ball is produced by the jet flow generated by the vortices in the wake flow. The directions of the force followed the changes of the jet flow, and the magnitude of the force was strongly associated with the flow rate of the jet. Moreover, the shape of the ball panels, especially the groove volume, determines the critical Reynolds number and the fluttering of the balls.

Sign in / Sign up

Export Citation Format

Share Document