[fp024a] Sidepod Radiator Study
- SimScale Project Page of "fp-024a - Sidepod / Radiator"
This study is based on simulations as in below.
- fp-023d - Rear Bodywork Study
- fp-023c - Front Aero Device Study
- fp-023b - Front Aero Devices
- Simulations
- Model with Updates
- Radiator Models
- Sidepod C / Radiator Duct C
- Sidepod Radiator Outlet Louvers
- Radiator Duct D
- Radiator Duct Turning Vanes
- Summary
I rebuilt a CFD model with mechanical design updates. The bodyworks are basically the same with the former model in fp-023d simulation. Major changes are as follows.
- Opening holes for suspension arms on the rear bodywork
- Opening one upper hole on the rear bodywork end
- Applying designs of mechanical parts inside the bodywork
- Modifying suspension geometries and arm designs
Coefficients of Forces on Body and Wheels
| Coef. | Control | Model with Updates | Difference | Difference % | Remarks |
|---|---|---|---|---|---|
| Cm | 0.0518 | 0.0352 | -0.0166 | -32.1 | |
| Cd | 0.5649 | 0.5637 | -0.0013 | -0.2 | |
| Cl | -0.2135 | -0.1795 | 0.0340 | -15.9 | |
| Clf | -0.0550 | -0.0546 | 0.0004 | -0.7 | |
| Clr | -0.1586 | -0.1249 | 0.0336 | -21.2 | |
| CoP | 0.7425 | 0.6959 | -0.0466 | -4.7 | |
| L/D | -0.3780 | -0.3185 | 0.0595 | -15.7 |
Coefficients of Forces on Body Only (without Wheels)
| Coef. | Control | Model with Updates | Difference | Difference % | Remarks |
|---|---|---|---|---|---|
| Cm | 0.0282 | 0.0099 | -0.0184 | -65.1 | |
| Cd | 0.4531 | 0.4545 | 0.0014 | 0.3 | |
| Cl | -0.2557 | -0.2176 | 0.0381 | -14.9 | |
| Clf | -0.0996 | -0.0989 | 0.0007 | -0.7 | |
| Clr | -0.1561 | -0.1186 | 0.0374 | -24.0 | |
| CoP | 0.6104 | 0.5453 | -0.0651 | -6.5 | |
| L/D | -0.5643 | -0.4786 | 0.0856 | -15.2 |
- Control : Re-calc. fp024d / Side Mirror - 30mm Higher & 20mm Outer
The drags and the front downforces are almost the same, but the rear downforce decreased significantly at the model with updates.
I searched for the causes and found some low pressure areas are decreasing on the bottom side of the stepped floor and the rear bumper.
Although the rear downforce is decreasing, since it is a model which the car designs are more applied to, simulations will be based on this model afterwards.
- Radiator Model : 20mm x 20mm Square Holes
- 14 x 9 = 126 Holes / 30mm Pitch / Depth 35mm
- Duct Area = 120523.294 (+/- 0.00023) square millimeters
- Not Hole Area = 70123.2943 (+/- 0.00023) square millimeters
- Opening 41.8% : (120523.294-70123.2943)/120523.294 = 0.41817642073
- Radiator Model : 10mm x 10mm Square Holes
- 28 x 18 = 504 Holes / 15mm Pitch / Depth 35mm
- Duct Area = 120523.294 (+/- 0.00023) square millimeters
- Not Hole Area = 70123.2943 (+/- 0.00023) square millimeters
- Opening 41.8% : (120523.294-70123.2943)/120523.294 = 0.41817642073
Radiator Model - None
Radiator Model - 20mm x 20mm Holes
Radiator Model - 10mm x 10mm Holes
Sidepod C & Radiator Duct C Difference GIF Images
Sidepod C - Louvers
Sidepod C - Louver Lower
Sidepod C - Louver Lower / Top Half
Sidepod C - Louver Lower Backward
Sidepod C - Louver Lower Backward / Top Half
Sidepod C - Louver Upper
