| dc.creator |
Ehirim, Obinna H. |
|
| dc.creator |
Knowles, Kevin |
|
| dc.creator |
Saddington, Alistair J. |
|
| dc.creator |
Finnis, Mark V. |
|
| dc.date |
2018-12-12T10:04:45Z |
|
| dc.date |
2018-12-12T10:04:45Z |
|
| dc.date |
2018-04-19 |
|
| dc.date.accessioned |
2022-05-25T16:40:34Z |
|
| dc.date.available |
2022-05-25T16:40:34Z |
|
| dc.identifier |
O. H. Ehirim, K. Knowles, A. J. Saddington and M. V. Finnis. Aerodynamics of a convex bump on a ground-effect diffuser. Journal of Fluids Engineering, Volume 140, Issue 9, 19 April 2018, Article number 091102; Paper No: FE-17-1625 |
|
| dc.identifier |
0098-2202 |
|
| dc.identifier |
https:doi.org/10.1115/1.4039518 |
|
| dc.identifier |
http://dspace.lib.cranfield.ac.uk/handle/1826/13720 |
|
| dc.identifier |
22120087 |
|
| dc.identifier.uri |
http://localhost:8080/xmlui/handle/CUHPOERS/182572 |
|
| dc.description |
A ground-effect diffuser is an upward-sloping section of the underbody of a racing car that enhances aerodynamic performance by increasing the downforce, thus improving tire grip. The downforce generated by a diffuser can be increased by geometric modifications that facilitate passive flow control. Here we modified a bluff body equipped with a 17° diffuser ramp surface (the baseline/plane diffuser) to introduce a convex bump near the end of the ramp surface. The flow features, force and surface pressure measurements determined in wind-tunnel experiments agreed with previous studies but the bump favorably altered the overall diffuser pressure recovery curve by increasing the flow velocity near the diffuser exit. This resulted in a static pressure drop near the diffuser exit followed by an increase to freestream static pressure, thus increasing the downforce across most of the ride heights we tested. We observed a maximum 4.9% increase in downforce when the modified diffuser was compared to the plane diffuser. The downforce increment declined as the ride height was gradually reduced to the low-downforce diffuser flow regime. |
|
| dc.language |
en |
|
| dc.publisher |
Journal of Fluids Engineering |
|
| dc.rights |
Attribution 4.0 International |
|
| dc.rights |
http://creativecommons.org/licenses/by/4.0/ |
|
| dc.subject |
aerodynamics |
|
| dc.subject |
ground-effect diffuser |
|
| dc.subject |
convex-surface |
|
| dc.subject |
pressure-recovery |
|
| dc.subject |
downforce |
|
| dc.title |
Aerodynamics of a convex bump on a ground-effect diffuser |
|
| dc.type |
Article |
|