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[fp024f] Rear Fender Study

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Yosuke Yamamoto edited this page May 6, 2021 · 60 revisions

fp024f - Rear Fender Study

Introduction

Models

Model Car Overview

fp024f_cfd_car-overview

Rear Fender Models

List of Rear Fender Models

  • Control ( Recalculated: fp024c - 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

fp024f_cfd-gif_rr-fender-50mm-higher-deck_comparisons

fp024f_cfd-gif_rr-fender-50mm-higher-deck_louvre-comparisons

Still Images of the Each Model

fp024f_cfd-label-small_00_control

fp024f_cfd-label-small_01_rr-fender-50mm-higher-deck

fp024f_cfd-label-small_02_rr-fender-50mm-higher-deck_fairing-fin

fp024f_cfd-label-small_03_rr-fender-50mm-higher-deck_fairing-box

fp024f_cfd-label-small_04_rr-fender-50mm-higher-deck_fairing-fin_upper-fence

fp024f_cfd-label-small_10_control_radiator-louvre

fp024f_cfd-label-small_11_rr-fender-50mm-higher-deck_radiator-louvre

Simulations

SimScale Project URL: https://www.simscale.com/workbench/?pid=6664511854195853653&mi=spec%3A9f1f9ba5-3e8f-4cc6-bf71-eb8d96356531%2Cservice%3ASIMULATION%2Cstrategy%3A11943

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		 Control
+ Rad. Louver		 50mm H-D
Std
+ Rad. Louver
Cd 0.5688 0.5684 0.5681 0.5671 0.5691 0.5662 0.5674
Cl -0.1923 -0.1941 -0.1980 -0.1949 -0.1958 -0.1839 -0.1890
Clf -0.0698 -0.0713 -0.0732 -0.0710 -0.0730 -0.0641 -0.0682
Clr -0.1225 -0.1229 -0.1248 -0.1239 -0.1227 -0.1197 -0.1208
CoP 0.6369 0.6328 0.6303 0.6356 0.6269 0.6512 0.6391
L/D -0.3380 -0.3416 -0.3486 -0.3437 -0.3440 -0.3247 -0.3331
RF m3/s 0.1628 0.1620 0.1620 0.1626 0.1913 0.2447 0.2358

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		 Control
+ Rad. Louver		 50mm H-D
Std
+ Rad. Louver
∆Cd 0.0000 -0.0004 -0.0007 -0.0017 0.0003 -0.0026 -0.0014
∆Cl 0.0000 -0.0019 -0.0058 -0.0026 -0.0035 0.0084 0.0033
∆Clf 0.0000 -0.0015 -0.0034 -0.0012 -0.0032 0.0057 0.0016
∆Clr 0.0000 -0.0004 -0.0024 -0.0014 -0.0003 0.0027 0.0017
∆CoP 0.0000 -0.0040 -0.0066 -0.0013 -0.0100 0.0143 0.0022
∆L/D 0.0000 -0.0035 -0.0106 -0.0056 -0.0060 0.0133 0.0049
∆RF m3/s 0.0000 -0.0008 -0.0008 -0.0002 0.0285 0.0819 0.0730
fp024f_cfd-graph_rr-fender_coef-diff
  • Fin increases downforces best
  • Box decreases drag

Comparison of Raditator Flows and Distributions

Comparison of Radiator Flows

fp024f_cfd-graph_rr-fender_radiator-flow

Comparison of Raditator Flow Distributions

fp024f_paraview_radiator_control

fp024f_paraview_radiator_50mm-higher-deck

fp024f_paraview_radiator_50mm-higher-deck_fairing-fin

fp024f_paraview_radiator_50mm-higher-deck_fairing-box

fp024f_paraview_radiator_50mm-higher-deck_fairing-fin_upper-fance

fp024f_paraview_radiator_control_louvre

fp024f_paraview_radiator_50mm-higher-deck_louvre

Summary

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