[fp024f] Rear Fender Study

fp024f - Rear Fender Study

Introduction

Models

Model Car Overview

• Overall Length : 3980 [mm]
• Overall Width : 1800 [mm]
• Wheel Base : 2650 [mm]
• Road Legal Design
• GitHub: https://github.com/y-yosuke/formula-ppoino

Rear Fender Models

List of Rear Fender Models

• Control ( Recalculated: Side Mirror C & Fr Fender Louver C3 )
• 50mm Higher Deck
• 50mm Higher Deck + Fairing Fin
• 50mm Higher Deck + Fairing Box
• 50mm Higher Deck + Fairing Fin + Upper Fence
• Control + Radiator Outlet Louvre
• 50mm Higher Deck + Radiator Outlet Louvre

GIF Animations of the Models

Still Images of the Each Models

Simulations

SimScale Project URL:

Conditions

• Freestream Velocity Magnitude Value : 30 [m/s]
• Ride Height : Front / Rear = 110 [mm] / 110 [mm]

Results - Coefficieints

• NOTE
  • RF: Radiator Flow

fp024f: Control

Coef.	Whole Car	Body	Fr Wheel	Rr Wheel
Cm	0.0263	0.0013	0.0211	0.0039
Cd	0.5688	0.4574	0.0491	0.0623
Cl	-0.1923	-0.2300	0.0304	0.0073
Clf	-0.0698	-0.1137	0.0363	0.0076
Clr	-0.1225	-0.1163	-0.0059	-0.0003
CoP	0.6369	0.5056	-0.1936	-0.0379
L/D	-0.3380	-0.5029	0.6187	0.1179
RF	0.1628	m3/s

fp024f: Rr Fender 50mm Higher Deck

Coef.	Whole Car	Body	Fr Wheel	Rr Wheel
Cm	0.0258	0.0007	0.0212	0.0039
Cd	0.5684	0.4556	0.0492	0.0636
Cl	-0.1941	-0.2326	0.0306	0.0078
Clf	-0.0713	-0.1155	0.0365	0.0078
Clr	-0.1229	-0.1170	-0.0059	0.0000
CoP	0.6328	0.5031	-0.1925	0.0044
L/D	-0.3416	-0.5105	0.6224	0.1227
RF	0.1620	m3/s

fp024f: Rr Fender 50mm Higher Deck - Fairing Fin

Coef.	Whole Car	Body	Fr Wheel	Rr Wheel
Cm	0.0258	0.0005	0.0212	0.0041
Cd	0.5681	0.4569	0.0492	0.0620
Cl	-0.1980	-0.2355	0.0306	0.0069
Clf	-0.0732	-0.1173	0.0365	0.0076
Clr	-0.1248	-0.1183	-0.0059	-0.0006
CoP	0.6303	0.5022	-0.1930	-0.0916
L/D	-0.3486	-0.5156	0.6207	0.1120
RF	0.1620	m3/s

fp024f: Rr Fender 50mm Higher Deck - Fairing Box

Coef.	Whole Car	Body	Fr Wheel	Rr Wheel
Cm	0.0264	0.0038	0.0212	0.0014
Cd	0.5671	0.4594	0.0493	0.0584
Cl	-0.1949	-0.2372	0.0307	0.0117
Clf	-0.0710	-0.1148	0.0366	0.0072
Clr	-0.1239	-0.1225	-0.0059	0.0045
CoP	0.6356	0.5162	-0.1925	0.3842
L/D	-0.3437	-0.5163	0.6225	0.1999
RF	0.1626	m3/s

fp024f: Rr Fender 50mm Higher Deck - Fairing Fin - Upper Fence

Coef.	Whole Car	Body	Fr Wheel	Rr Wheel
Cm	0.0248	-0.0005	0.0215	0.0039
Cd	0.5691	0.4582	0.0497	0.0613
Cl	-0.1958	-0.2342	0.0311	0.0073
Clf	-0.0730	-0.1176	0.0371	0.0075
Clr	-0.1227	-0.1165	-0.0059	-0.0002
CoP	0.6269	0.4977	-0.1911	-0.0315
L/D	-0.3440	-0.5111	0.6265	0.1186
RF	0.1913	m3/s

fp024f: Control - Radiator Louvre

Coef.	Whole Car	Body	Fr Wheel	Rr Wheel
Cm	0.0278	0.0032	0.0210	0.0036
Cd	0.5662	0.4565	0.0492	0.0605
Cl	-0.1839	-0.2219	0.0303	0.0077
Clf	-0.0641	-0.1077	0.0362	0.0074
Clr	-0.1197	-0.1141	-0.0059	0.0003
CoP	0.6512	0.5144	-0.1945	0.0388
L/D	-0.3247	-0.4861	0.6159	0.1276
RF	0.2447	m3/s

fp024f: Rr Fender - 50mm Higher Deck - Radiator Louvre

Coef.	Whole Car	Body	Fr Wheel	Rr Wheel
Cm	0.0263	0.0018	0.0212	0.0033
Cd	0.5674	0.4562	0.0492	0.0620
Cl	-0.1890	-0.2281	0.0306	0.0086
Clf	-0.0682	-0.1123	0.0364	0.0076
Clr	-0.1208	-0.1159	-0.0059	0.0010
CoP	0.6391	0.5079	-0.1931	0.1129
L/D	-0.3331	-0.5000	0.6205	0.1380
RF	0.2358	m3/s

Comparisons

Comparisons of Coefficients

Comparison of the Whole Body Coefficients

Coef.	Control	50mm H-D Std	50mm H-D Fin	50mm H-D Box	50mm H-D Fin+UprFence
Cd	0.5688	0.5684	0.5681	0.5671	0.5691
Cl	-0.1923	-0.1941	-0.1980	-0.1949	-0.1958
Clf	-0.0698	-0.0713	-0.0732	-0.0710	-0.0730
Clr	-0.1225	-0.1229	-0.1248	-0.1239	-0.1227
CoP	0.6369	0.6328	0.6303	0.6356	0.6269
L/D	-0.3380	-0.3416	-0.3486	-0.3437	-0.3440
RF	0.1628	0.1620	0.1620	0.1626	0.1913

Differences from "Original Rear Fender (Control)" - Coefficients

Coef.	Control	50mm H-D Std	50mm H-D Fin	50mm H-D Box	50mm H-D Fin+UprFence
∆Cd	0.0000	-0.0004	-0.0007	-0.0017	0.0003
∆Cl	0.0000	-0.0019	-0.0058	-0.0026	-0.0035
∆Clf	0.0000	-0.0015	-0.0034	-0.0012	-0.0032
∆Clr	0.0000	-0.0004	-0.0024	-0.0014	-0.0003
∆CoP	0.0000	-0.0040	-0.0066	-0.0013	-0.0100
∆L/D	0.0000	-0.0035	-0.0106	-0.0056	-0.0060
∆RF	0.0000	-0.0008	-0.0008	-0.0002	0.0285

• Fin increases downforces best
• Box decreases drag

Comparison of Raditator Flows and Distributions

Summary