CFD Rear Bodywork on SimScale (fp-023d)

y-yosuke commented 7 years ago

[x] Remesh and Recalc ? fp-023d Control
[x] Rr Fender with the wheelhouse for the tire stroke and Side Pod Mod
[x] Diffuser End 20mm Higher
- For YASA P400 Motors and Xtarc P1227 Gearbox
[x] Diffuser Vertical Fins
- [x] Thickness 30-40mm
- [x] Thickness 10mm
[x] Rr Bumper B
[x] Rr Bonnet Horizontal Vane
[x] Side Mirror
- [x] Side Mirrorless
- [x] Higher Side Mirros for Higher Rr Wing
- Side Mirror 30mm Highter / 20mm Outer
[x] Rr Wing
- [x] Main Plane 1pc Z+50mm
- [x] Two Pieces
- [x] Main Plane 1.4 / Flap 1.3 32.7deg
  - [x] Control
  - [x] - 5deg
  - [x] - 10deg
  - [x] - RH 110-110mm
  - [x] - RH 90-110mm
- [x] Main Plane 1.4 / Flap 1.3 27.7deg
- [x] ~Main Plane 1.4 x1.25 Mod -5deg / Flap 1.3 20deg~
- [x] ~Main Plane 1.4 x1.25 Mod / Flap 1.3 32.7deg~
[x] ~Higher Windscreen~

y-yosuke commented 7 years ago

fp-023d - Rear Bodywork @ SimScale https://www.simscale.com/projects/yosukegb4/fp-023d_-_control_1/

y-yosuke commented 7 years ago

Google SpreadSheet : Coefficients Comparison fp-023d for GitHub Issues https://docs.google.com/spreadsheets/d/1j4ySBqmNtPsV2u_0bn1lc_qqCUI9dESTD_0UFHFbY3c/edit#gid=0

y-yosuke commented 7 years ago

Remesh and Recalc fp-023d Control Comparison

All calculations below are CFD using the same car body shape and posture of 'Fr Fender Louver C + Louver Stay B'.

Control (Aug 2016) : fp-023c - Front Aero Devices / Simulation - fp-023c - Fr Fender Louver C Louver Stay B
- https://www.simscale.com/workbench/?pid=3781955060523638359#tab_1-0
Recalc (Jul 2017) : Re-calculated result using the mesh of Control (aug 2016)
Remash (Jul 2017) : Remesh the STL data newly exported the same CAD model of 'Fr Fender Louver C + Louver Stay B' and recalc the mesh

It seems the differences depends on Jul 2017 or Aug 2016. Did any CFD simulation conditions changed when I copied the project and simulations or anything else ???

Body and Wheels : Fr Fender Louver C + Louver Stay B

Coef.	Control (Aug 2016)	Difference	Recalc (Jul 2017)	Difference	Remesh (Jul 2017)
Cm	0.0496	0.0013	0.0509	-0.0006	0.0503
Cd	0.5622	0.0626	0.6248	0.0006	0.6253
Cl	-0.1990	0.0161	-0.1828	0.0003	-0.1825
Clf	-0.0499	0.0094	-0.0406	-0.0004	-0.0409
Clr	-0.1490	0.0068	-0.1423	0.0007	-0.1415
CoP	0.7491	0.0291	0.7782	-0.0025	0.7756
L/D	-0.3539	0.0613	-0.2926	0.0008	-0.2918

Body Only Fr Fender Louver C + Louver Stay B

Coef.	Control (Aug 2016)	Difference	Recalc (Jul 2017)	Difference	Remesh (Jul 2017)
Cm	0.0300	0.0010	0.0310	-0.0004	0.0306
Cd	0.4401	0.0240	0.4640	0.0000	0.4641
Cl	-0.2515	0.0585	-0.1931	0.0008	-0.1923
Clf	-0.0958	0.0303	-0.0655	0.0000	-0.0656
Clr	-0.1557	0.0282	-0.1275	0.0008	-0.1268
CoP	0.6192	0.0414	0.6606	-0.0014	0.6591
L/D	-0.5716	0.1555	-0.4161	0.0016	-0.4144

y-yosuke commented 7 years ago

I checked the CFD simulation conditions 1 by 1, but I could not find any differences.

y-yosuke commented 7 years ago

Solver Log

Control (Aug 2016)

ExecutionTime = 9447.2 s  ClockTime = 9489 s
forces forces00 output:
    sum of forces:
        pressure : (193.594173988 -212.110703092 -75.7760171924)
        viscous  : (17.3917652795 -1.08442962181 1.11069449078)
        porous   : (0 0 0)
    sum of moments:
        pressure : (89.2308128353 39.431771951 87.3466997841)
        viscous  : (-0.291788799091 9.8484672478 11.4303927196)
        porous   : (0 0 0)
forceCoeffs forceCoeffs02 output:
    Cm    = 0.0299764568244
    Cd    = 0.440050754546
    Cl    = -0.251531019826
    Cl(f) = -0.0957890530888
    Cl(r) = -0.155741966738
forceCoeffs forceCoeffs01 output:
    Cm    = 0.0495514285929
    Cd    = 0.562189539161
    Cl    = -0.198951946782
    Cl(f) = -0.049924544798
    Cl(r) = -0.149027401984
End
Finalising parallel run

Recalc (Jul 2017)

ExecutionTime = 9234.12 s  ClockTime = 9330 s
forces forces00 output:
    sum of forces:
        pressure : (189.281026352 -196.252364887 -72.8171329932)
        viscous  : (45.1944284719 -3.21975993178 4.20380348382)
        porous   : (0 0 0)
    sum of moments:
        pressure : (92.3956264237 24.053322206 89.8511498638)
        viscous  : (-1.06376364958 26.5247248955 29.0178772838)
        porous   : (0 0 0)
forceCoeffs forceCoeffs02 output:
    Cm    = 0.031001740487
    Cd    = 0.464048885949
    Cl    = -0.193073503032
    Cl(f) = -0.065535011029
    Cl(r) = -0.127538492003
forceCoeffs forceCoeffs01 output:
    Cm    = 0.0508563783388
    Cd    = 0.624779302117
    Cl    = -0.182825908831
    Cl(f) = -0.0405565760767
    Cl(r) = -0.142269332754
End
Finalising parallel run

Remesh (Jul 2017)

ExecutionTime = 8022.43 s  ClockTime = 8094 s
forces forces00 output:
    sum of forces:
        pressure : (189.499706774 -196.431722066 -72.6679161092)
        viscous  : (45.1896596016 -3.22240724966 4.18000960119)
        porous   : (0 0 0)
    sum of moments:
        pressure : (92.5310074026 23.5012409058 89.6205071841)
        viscous  : (-1.05549639158 26.5240747388 29.015966035)
        porous   : (0 0 0)
forceCoeffs forceCoeffs02 output:
    Cm    = 0.0306025076852
    Cd    = 0.464068604351
    Cl    = -0.192320230353
    Cl(f) = -0.0655576074912
    Cl(r) = -0.126762622862
forceCoeffs forceCoeffs01 output:
    Cm    = 0.0503006051981
    Cd    = 0.625349287192
    Cl    = -0.182491708838
    Cl(f) = -0.0409452492211
    Cl(r) = -0.141546459617
End
Finalising parallel run

y-yosuke commented 7 years ago

Convergence plot curve comparison

Control (Aug 2016) 2017-07-14 19 32 09

Recalc (Jul 2017) 2017-07-14 19 32 38

Remesh (Jul 2017) 2017-07-14 19 32 53

y-yosuke commented 7 years ago

Hmm..., the convergence curves have changed from Aug 2016 too.

y-yosuke commented 7 years ago

Iteration Number and Convergence (Part 1)

N=800 is not enough. N=1000 is needed at least, or more iterations?

Rr fender for Tire Stroke

Body and Wheels

Coef.	N=800	N=1000	Difference	Difference %
Cm	0.0464	0.0451	-0.0013	-2.9
Cd	0.6238	0.6242	0.0004	0.1
Cl	-0.1741	-0.1696	0.0046	-2.6
Clf	-0.0406	-0.0397	0.0009	-2.3
Clr	-0.1335	-0.1299	0.0036	-2.7
CoP	0.7667	0.7660	-0.0007	-0.1
L/D	-0.2792	-0.2716	0.0075	-2.7

Body Only

Coef.	N=800	N=1000	Difference	Difference %
Cm	0.0306	0.0272	-0.0034	-11.1
Cd	0.4641	0.4687	0.0046	1.0
Cl	-0.1923	-0.1826	0.0097	-5.1
Clf	-0.0656	-0.0641	0.0015	-2.3
Clr	-0.1268	-0.1185	0.0083	-6.5
CoP	0.6591	0.6491	-0.0101	-1.0
L/D	-0.4144	-0.3896	0.0249	-6.0

Convergence Plot

2017-07-18 9 24 26

Force Coefficients Plot

Body and Wheels Coefficients

2017-07-18 9 27 53

Body Coefficients

2017-07-18 9 27 53

y-yosuke commented 7 years ago

Rr Fender with the wheelhouse for the tire stroke and Side Pod Mod

On rear wheel the downforce decreases or the lift force increases.

Rr fender for Tire Stroke (N=800) / Control : Remesh (Jul 2017)

Body and Wheels

Coef.	Control	Rr Fender for Tire Stroke	Difference	Difference %	Remarks
Cm	0.0503	0.0464	-0.0039	-7.7
Cd	0.6253	0.6238	-0.0015	-0.2
Cl	-0.1825	-0.1741	+0.0083	+4.6
Clf	-0.0409	-0.0406	+0.0003	+0.8
Clr	-0.1415	-0.1335	+0.0080	+5.7	Decleace in Rr Downforce
CoP	0.7756	0.7667	-0.0089	-0.9
L/D	-0.2918	-0.2792	+0.0127	+4.3

Body Only

Coef.	Control	Rr Fender for Tire Stroke	Difference	Difference %	Remarks
Cm	0.0310	0.0306	-0.0004	-1.3
Cd	0.4640	0.4641	+0.0000	+0.0
Cl	-0.1931	-0.1923	+0.0008	+0.4
Clf	-0.0655	-0.0656	-0.0000	-0.0
Clr	-0.1275	-0.1268	+0.0008	+0.6	Difference is much smaller than that of Body and Wheels
CoP	0.6606	0.6591	-0.0014	-0.1
L/D	-0.4161	-0.4144	+0.0016	+0.4

y-yosuke commented 7 years ago

Iteration Number and Convergence (Part 2)

Rr Fender for Tire Stroke (Run 2)

Body and Wheels

Coef.	800	Diff	900	Diff	1000	Diff	1100	Diff	1200	Diff	1300	Diff	1400
Cm	0.0464	-0.0006	0.0459	-0.0008	0.0451	-0.0004	0.0447	-0.0001	0.0446	-0.0007	0.0439	-0.0006	0.0433
Cd	0.6238	0.0004	0.6242	0.0000	0.6242	-0.0001	0.6241	-0.0006	0.6236	-0.0010	0.6226	-0.0007	0.6218
Cl	-0.1741	0.0022	-0.1720	0.0024	-0.1696	0.0014	-0.1681	0.0004	-0.1678	0.0017	-0.1660	0.0012	-0.1649
Clf	-0.0406	0.0005	-0.0401	0.0004	-0.0397	0.0003	-0.0394	0.0001	-0.0393	0.0001	-0.0391	0.0000	-0.0392
Clr	-0.1335	0.0016	-0.1319	0.0020	-0.1299	0.0011	-0.1288	0.0003	-0.1285	0.0016	-0.1269	0.0012	-0.1257

Body Only

Coef.	800	Diff	900	Diff	1000	Diff	1100	Diff	1200	Diff	1300	Diff	1400
Cm	0.0288	-0.0007	0.0281	-0.0009	0.0272	-0.0005	0.0268	-0.0001	0.0266	-0.0008	0.0258	-0.0007	0.0252
Cd	0.4686	0.0002	0.4689	-0.0002	0.4687	-0.0001	0.4685	-0.0002	0.4683	-0.0009	0.4674	-0.0008	0.4666
Cl	-0.1874	0.0024	-0.1850	0.0024	-0.1826	0.0012	-0.1813	0.0001	-0.1812	0.0016	-0.1796	0.0013	-0.1783
Clf	-0.0649	0.0005	-0.0644	0.0004	-0.0641	0.0002	-0.0639	-0.0001	-0.0640	0.0000	-0.0640	0.0000	-0.0640
Clr	-0.1225	0.0019	-0.1206	0.0021	-0.1185	0.0011	-0.1174	0.0002	-0.1173	0.0016	-0.1156	0.0013	-0.1143

Convergence plot

2017-07-18 22 26 38

body-wheels coefficient plot

2017-07-18 22 27 55

body coefficient plot

2017-07-18 22 29 06

y-yosuke commented 7 years ago

Iteration Number and Convergence (Part 3)

Diffuser End 20mm Higher

Body and Wheels

Coef.	800	Diff	900	Diff	1000	Diff	1100	Diff	1200	Diff	1300	Diff	1400
Cm	0.0490	-0.0007	0.0483	-0.0007	0.0475	-0.0006	0.0470	0.0000	0.0469	-0.0008	0.0461	-0.0011	0.0450
Cd	0.6235	0.0004	0.6239	-0.0002	0.6237	-0.0004	0.6233	-0.0004	0.6230	-0.0007	0.6222	-0.0010	0.6212
Cl	-0.1928	0.0026	-0.1902	0.0020	-0.1882	0.0025	-0.1857	0.0006	-0.1851	0.0015	-0.1836	0.0020	-0.1816
Clf	-0.0474	0.0005	-0.0468	0.0003	-0.0466	0.0007	-0.0459	0.0003	-0.0456	-0.0001	-0.0457	-0.0001	-0.0458
Clr	-0.1454	0.0020	-0.1434	0.0017	-0.1416	0.0018	-0.1398	0.0004	-0.1395	0.0015	-0.1379	0.0021	-0.1358

Body Only

Coef.	800	Diff	900	Diff	1000	Diff	1100	Diff	1200	Diff	1300	Diff	1400
Cm	0.0314	-0.0009	0.0305	-0.0008	0.0297	-0.0006	0.0291	-0.0001	0.0290	-0.0009	0.0280	-0.0011	0.0270
Cd	0.4686	0.0001	0.4687	-0.0004	0.4683	-0.0001	0.4682	-0.0001	0.4681	-0.0010	0.4670	-0.0011	0.4660
Cl	-0.2060	0.0029	-0.2032	0.0020	-0.2012	0.0021	-0.1991	0.0005	-0.1987	0.0015	-0.1971	0.0020	-0.1951
Clf	-0.0716	0.0005	-0.0711	0.0002	-0.0709	0.0004	-0.0705	0.0001	-0.0704	-0.0001	-0.0705	0.0000	-0.0705
Clr	-0.1344	0.0023	-0.1321	0.0018	-0.1303	0.0017	-0.1286	0.0004	-0.1283	0.0017	-0.1266	0.0021	-0.1245

Convergence plot

2017-07-18 22 33 46

body-wheels coefficient plot

2017-07-18 22 34 56

body coefficient plot

2017-07-18 22 35 34

y-yosuke commented 7 years ago

Iteration Number and Convergence - Conclusion

N=1200 : Best

y-yosuke commented 7 years ago

Diffuser End 20mm Higher

Diffuser End 20mm Higher (N=1200) / Control : Rr Fender for Tire Stroke (N=1200)

Body and Wheels

Coef.	Control	Diffuser End Z+20mm	Difference	Difference %
Cm	0.0446	0.0469	+0.0023	+5.2
Cd	0.6236	0.6230	-0.0006	-0.1
Cl	-0.1678	-0.1851	-0.0173	-10.3
Clf	-0.0393	-0.0456	-0.0063	-16.1
Clr	-0.1285	-0.1395	-0.0110	-8.5
CoP	0.7660	0.7536	-0.0123	-1.2
L/D	-0.2690	-0.2971	-0.0281	-10.4

Body Only

Coef.	Control	Diffuser End Z+20mm	Difference	Difference %
Cm	0.0266	0.0290	+0.0023	+8.7
Cd	0.4683	0.4681	-0.0002	-0.1
Cl	-0.1812	-0.1987	-0.0174	-9.6
Clf	-0.0640	-0.0704	-0.0064	-10.0
Clr	-0.1173	-0.1283	-0.0110	-9.4
CoP	0.6469	0.6458	-0.0012	-0.1
L/D	-0.3870	-0.4244	-0.0374	-9.7

Diffuser End 20mm Higher
- Front and rear downforces increase without increase of drag
- Improvement of L/D

y-yosuke commented 7 years ago

Diffuser End 20mm Higher - ParaView / Pressure Comparison

Pressure Underbody fp-023d_pv_diffuser-end_20mm-higher

Pressure Underbody - Zoom to Floor fp-023d_pv_diffuser-end_20mm-higher_zoom-floor

Pressure Underbody - Diffuser Bottom View fp-023d_pv_diffuser-end_20mm-higher_diffuser-bottom-view

y-yosuke commented 7 years ago

Diffuser End 20mm Higher - ParaView / Flow Comparison

Rear View fp-023d_pv_diffuser-end_20mm-higher_floor-flow_rear-view

Left View - GIF Animation fp-023d_pv_diffuser-end_20mm-higher_floor-flow_side-view

y-yosuke commented 7 years ago

I also write these in SimScale Forum. https://www.simscale.com/forum/t/fp-023d-rear-bodywork-simulation-project-by-yosukegb4/76182

y-yosuke commented 7 years ago

Diffuser Vertical Fin

Diffuser Vertical Fin / Control : Diffuser End 20mm Higher (Diffuser Vertical Fin - None)

Body and Wheels

Coef.	Control	Difference	Diffuser Vertical Fin t10	Difference	Diffuser Vertical Fin t30-40
Cm	0.0469	-0.0009	0.0461	-0.0005	0.0455
Cd	0.6230	0.0002	0.6232	0.0000	0.6232
Cl	-0.1851	0.0036	-0.1815	0.0055	-0.1760
Clf	-0.0456	0.0009	-0.0447	0.0022	-0.0425
Clr	-0.1395	0.0027	-0.1368	0.0033	-0.1336
CoP	0.7536	0.0002	0.7538	0.0049	0.7587
L/D	-0.2971	0.0058	-0.2913	0.0088	-0.2825

Body Only

Coef.	Control	Difference	Diffuser Vertical Fin t10	Difference	Diffuser Vertical Fin t30-40
Cm	0.0290	-0.0009	0.0281	-0.0007	0.0274
Cd	0.4681	0.0001	0.4681	0.0004	0.4685
Cl	-0.1987	0.0035	-0.1951	0.0052	-0.1899
Clf	-0.0704	0.0009	-0.0695	0.0019	-0.0676
Clr	-0.1283	0.0027	-0.1256	0.0033	-0.1223
CoP	0.6458	-0.0019	0.6439	0.0004	0.6442
L/D	-0.4244	0.0076	-0.4168	0.0115	-0.4053

'Diffuser Vertical Fin - None' is the best. These vertical fins decrease the downforces.

y-yosuke commented 7 years ago

Diffuser Vertical Fin - None / Flow and Pressure Comparison

Bottom View

It seems the fin is interfering with the flow a little.

fp-023d_pv_diffuser-vertical-fin_floor-flow_bottm-view

Rear View fp-023d_pv_diffuser-vertical-fin_floor-flow_rear-view

Side View - GIF Animaiton fp-023d_pv_diffuser-vertical-fin_floor-flow_side-view

Pressure - Bottom View fp-023d_pv_diffuser-vertical-fin_pressure_bottm-view

y-yosuke commented 7 years ago

Rr Bumper B

2017-07-27 14 48 18

Rr Bumper B / Control : Diffuser End 20mm Higher (N=1200)

Body and Wheels

Coef.	Control	Rr Bumper B	Difference	Difference %
Cm	0.0469	0.0448	-0.0022	-4.6
Cd	0.6230	0.6229	-0.0001	0.0
Cl	-0.1851	-0.1855	-0.0004	0.2
Clf	-0.0456	-0.0480	-0.0024	5.2
Clr	-0.1395	-0.1375	0.0020	-1.4
CoP	0.7536	0.7413	-0.0123	-1.2
L/D	-0.2971	-0.2978	-0.0007	0.2

Body Only

Coef.	Control	Rr Bumper B	Difference	Difference %
Cm	0.0290	0.0269	-0.0021	-7.2
Cd	0.4681	0.4681	0.0000	0.0
Cl	-0.1987	-0.1991	-0.0005	0.2
Clf	-0.0704	-0.0727	-0.0023	3.3
Clr	-0.1283	-0.1264	0.0018	-1.4
CoP	0.6458	0.6350	-0.0108	-1.1
L/D	-0.4244	-0.4254	-0.0010	0.2

'Rr Bumper B' slightly increases front downforce and decrease rear downforce.
These changes of downforces are small and not deterministic.
The drag is almost the same.

y-yosuke commented 7 years ago

Rr Bumper B - U Magnitude Comparison

Section Y=-450 - GIF Animation fp-023d_pv_rr-bumper-b_u-mag_y-450

y-yosuke commented 7 years ago

Rr Bonnet Horizontal Vane

fp-023d_cad-image_rr-bonnet-horizontal-vane

Rr Bonnet Horizontal Vane / Control : Rr Bumper B

Body and Wheels

Coef.	Control	Rr Bonnet Horizontal Vane	Difference	Difference %
Cm	0.0448	0.0435	-0.0013	-2.8
Cd	0.6229	0.6223	-0.0006	-0.1
Cl	-0.1855	-0.1842	0.0013	-0.7
Clf	-0.0480	-0.0486	-0.0006	1.3
Clr	-0.1375	-0.1356	0.0019	-1.4
CoP	0.7413	0.7362	-0.0052	-0.5
L/D	-0.2978	-0.2960	0.0019	-0.6

Body Only

Coef.	Control	Rr Bonnet Horizontal Vane	Difference	Difference %
Cm	0.0269	0.0253	-0.0016	-5.9
Cd	0.4681	0.4676	-0.0005	-0.1
Cl	-0.1991	-0.1981	0.0011	-0.5
Clf	-0.0727	-0.0737	-0.0011	1.4
Clr	-0.1264	-0.1243	0.0021	-1.7
CoP	0.6350	0.6277	-0.0073	-0.7
L/D	-0.4254	-0.4235	0.0018	-0.4

'Rr Bonnet Horizontal Vane' slightly increases front downforce and decrease rear downforce.
These changes of downforces are small and not deterministic.
The drag is almost the same.

y-yosuke commented 7 years ago

Rr Bonnet Horizontal Vane - Flow and Pressure Comparison

fp-023d_pv_rr-bonnet-h-vane_diffuser_center-flow

fp-023d_pv_rr-bonnet-h-vane_p_top-view

y-yosuke commented 7 years ago

Side Mirror

Side Mirrorless

Side Mirrorless / Control : Rr Bonnet Horizontal Vane

Body and Wheels

Coef.	Control	Side Mirrorless	Difference	Difference %
Cm	0.0435	0.0363	-0.0072	-16.5
Cd	0.6223	0.6205	-0.0018	-0.3
Cl	-0.1842	-0.2012	-0.0170	9.2
Clf	-0.0486	-0.0643	-0.0157	32.3
Clr	-0.1356	-0.1369	-0.0013	1.0
CoP	0.7362	0.6805	-0.0557	-5.6
L/D	-0.2960	-0.3242	-0.0283	9.6

Body Only

Coef.	Control	Side Mirrorless	Difference	Difference %
Cm	0.0253	0.0184	-0.0069	-27.3
Cd	0.4676	0.4631	-0.0045	-1.0
Cl	-0.1981	-0.2136	-0.0156	7.9
Clf	-0.0737	-0.0884	-0.0147	19.9
Clr	-0.1243	-0.1252	-0.0009	0.7
CoP	0.6277	0.5861	-0.0417	-4.2
L/D	-0.4235	-0.4612	-0.0377	8.9

'Side Mirror' decreases the front downforce or increases the front lift force.
The drags and the rear downforce are similar between 'Side Mirrorless' and 'Original Side Mirror'.

y-yosuke commented 7 years ago

Side Mirrorless - Flow and Pressure Comparison

Flow Comparison - GIF Animaiton fp-023d_pv_side-mirrorless_flow_side-view

It seems that the side mirror is bending the flow downward and generating lift force.

Pressure Comparison fp-023d_pv_side-mirrorless_pressure_top-view

y-yosuke commented 7 years ago

Side Mirror - 30mm Higher and 20mm Outer

Change of the side mirror position for higer rear wings

2017-07-24 15 36 21

Side Mirror - 30mm Higher and 20mm Outer / Control : Rr Bonnet Horizontal Vane (Side Mirror Origin)

Body and Wheels

Coef.	Control	Side Mirror - 30mm Higher & 20mm Outer	Difference	Difference %
Cm	0.0435	0.0436	0.0001	0.1
Cd	0.6223	0.6229	0.0006	0.1
Cl	-0.1842	-0.1819	0.0022	-1.2
Clf	-0.0486	-0.0474	0.0012	-2.4
Clr	-0.1356	-0.1345	0.0011	-0.8
CoP	0.7362	0.7394	0.0032	0.3
L/D	-0.2960	-0.2921	0.0039	-1.3

Body Only

Coef.	Control	Side Mirror - 30mm Higher & 20mm Outer	Difference	Difference %
Cm	0.0253	0.0256	0.0002	1.0
Cd	0.4676	0.4685	0.0008	0.2
Cl	-0.1981	-0.1959	0.0022	-1.1
Clf	-0.0737	-0.0724	0.0013	-1.8
Clr	-0.1243	-0.1235	0.0008	-0.7
CoP	0.6277	0.6304	0.0027	0.3
L/D	-0.4235	-0.4182	0.0054	-1.3

'Side Mirror - 30mm Higher and 20mm Outer' decreases the front and rear downforce. But the differnces are not enough large for difinite.
The drags are almost the same.

y-yosuke commented 7 years ago

Side Mirror 30mm Higher 20mm Outer - Flow and Pressure Comparison

Flow Comparison - Side View / GIF Animation fp-023d_pv_side-mirror-higher-outer_flow_side-view

Pressure Comparison - Top View fp-023d_pv_side-mirror-higher-outer_p_top-view

y-yosuke commented 7 years ago

Rr Wing

Rr Wing - 1 Piece 50mm Higher

Rr Wing 1pc 50mm Higher / Control : Side Mirror - 30mm Higher & 20mm Outer

Body and Wheels

Coef.	Control	Rr Wing 1pc 50mm Higher	Difference	Difference %
Cm	0.0436	0.0487	0.0051	11.8
Cd	0.6229	0.6255	0.0026	0.4
Cl	-0.1819	-0.1870	-0.0051	2.8
Clf	-0.0474	-0.0448	0.0026	-5.5
Clr	-0.1345	-0.1422	-0.0077	5.7
CoP	0.7394	0.7603	0.0209	2.1
L/D	-0.2921	-0.2990	-0.0069	2.4

Body Only

Coef.	Control	Rr Wing 1pc 50mm Higher	Difference	Difference %
Cm	0.0256	0.0307	0.0051	20.1
Cd	0.4685	0.4711	0.0026	0.6
Cl	-0.1959	-0.2008	-0.0049	2.5
Clf	-0.0724	-0.0697	0.0027	-3.7
Clr	-0.1235	-0.1311	-0.0076	6.2
CoP	0.6304	0.6528	0.0224	2.2
L/D	-0.4182	-0.4263	-0.0082	2.0

'50mm Higher Rr Wing' increases the rear downforce and decreases the front downforce.
'50mm Higher Rr Wing' increases the drag slightly.

y-yosuke commented 7 years ago

Rr Wing - 1 Piece 50mm Higher - Flow and Pressure Comparison

Center Flow Comparison / GIF Animation Line Pitch : 20mm fp-023d_pv_rr-wing_1pc-50mm-higher_center-flow_line-pitch-20mm

Line Pitch : 10mm fp-023d_pv_rr-wing_1pc-50mm-higher_center-flow

Pressure Comparison - Top View fp-023d_pv_rr-wing_1pc-50mm-higher_p_top-view

Pressure Comparison - Bottom View fp-023d_pv_rr-wing_1pc-50mm-higher_p_bottom-view

Pressure Comparison - Rear View fp-023d_pv_rr-wing_1pc-50mm-higher_p_rear-view

y-yosuke commented 7 years ago

Rr Wing - 1 Piece and 2 Pieces

2 pcs Control : Rr Wing Main 1.4 Flap 1.3 32.7deg
2 pcs -5 deg : Rr Wing -5deg / Main 1.4 Flap 1.3
2 pcs -10 deg : Rr Wing -10deg / Main 1.4 Flap 1.3
1 pc Z+50mm : Rr Wing 1pc 50mm Higher

Body and Wheels

Coef.	2 pcs Control	2 pcs -5deg	2 pcs -10deg	1 pc Z+50mm
Cm	0.1099	0.1144	0.1020	0.0487
Cd	0.6641	0.6575	0.6483	0.6255
Cl	-0.3098	-0.3142	-0.2883	-0.1870
Clf	-0.0450	-0.0427	-0.0421	-0.0448
Clr	-0.2648	-0.2715	-0.2462	-0.1422
CoP	0.8548	0.8641	0.8538	0.7603
L/D	-0.4666	-0.4779	-0.4447	-0.2990

Body Only

Coef.	2 pcs Control	2 pcs -5deg	2 pcs -10deg	1 pc Z+50mm
Cm	0.0909	0.0954	0.0834	0.0307
Cd	0.5030	0.4971	0.4896	0.4711
Cl	-0.3234	-0.3280	-0.3021	-0.2008
Clf	-0.0708	-0.0686	-0.0677	-0.0697
Clr	-0.2526	-0.2594	-0.2344	-0.1311
CoP	0.7810	0.7909	0.7759	0.6528
L/D	-0.6430	-0.6597	-0.6170	-0.4263

y-yosuke commented 7 years ago

Rr Wing - 1 Piece and 2 Pieces / Flow Comparizon - Wing and Diffuser

Flow Comparison - GIF Animation

fp-023d_pv_4-rr-wings_center-flow_wing-diffuser

Each Still Images

fp-023d_pv_4-rr-wings_center-flow_wing-diffuser_1

fp-023d_pv_4-rr-wings_center-flow_wing-diffuser_2

fp-023d_pv_4-rr-wings_center-flow_wing-diffuser_3

fp-023d_pv_4-rr-wings_center-flow_wing-diffuser_4

y-yosuke commented 7 years ago

Rr Wing - 1 Piece and 2 Pieces / Flow Comparizon - Wing

Flow Comparison - GIF Animation

fp-023d_pv_4-rr-wings_center-flow_wing

Each Still Images

fp-023d_pv_4-rr-wings_center-flow_wing_1

fp-023d_pv_4-rr-wings_center-flow_wing_2

fp-023d_pv_4-rr-wings_center-flow_wing_3

fp-023d_pv_4-rr-wings_center-flow_wing_4

y-yosuke commented 7 years ago

Rr Wing - 1 Piece and 2 Pieces / U Magnitude Comparizon - Wing

Flow Comparison - GIF Animation

fp-023d_pv_4-rr-wings_center-u_wing

Each Still Images

fp-023d_pv_4-rr-wings_center-u_wing_1

fp-023d_pv_4-rr-wings_center-u_wing_2

fp-023d_pv_4-rr-wings_center-u_wing_3

fp-023d_pv_4-rr-wings_center-u_wing_4

y-yosuke commented 7 years ago

Rr Wing Flap Angle

2017-07-27 14 33 20

Rr Wing -5deg / Main 1.4 Flap 1.3 27.7deg (-5deg) Control : Rr Wing -5deg / Main 1.4 Flap 1.3 (37.7deg)

Body and Wheels

Coef.	Control	Rr Wing Flap -5deg	Difference	Difference %
Cm	0.1144	0.1087	-0.0057	-5.0
Cd	0.6575	0.6533	-0.0042	-0.6
Cl	-0.3142	-0.3014	0.0128	-4.1
Clf	-0.0427	-0.0420	0.0007	-1.5
Clr	-0.2715	-0.2594	0.0121	-4.5
CoP	0.8641	0.8605	-0.0036	-0.4
L/D	-0.4779	-0.4614	0.0165	-3.5

Body Only

Coef.	Control	Rr Wing Flap -5deg	Difference	Difference %
Cm	0.0954	0.0899	-0.0055	-5.8
Cd	0.4971	0.4935	-0.0036	-0.7
Cl	-0.3280	-0.3152	0.0127	-3.9
Clf	-0.0686	-0.0677	0.0008	-1.2
Clr	-0.2594	-0.2475	0.0119	-4.6
CoP	0.7909	0.7851	-0.0058	-0.6
L/D	-0.6597	-0.6387	0.0210	-3.2

y-yosuke commented 7 years ago

Rr Wing Flap Angle - Flow Comparison

Wing and Diffuser Flow Comparison - GIF Animation

fp-023d_pv_rr-wing_flap-m5deg_center-flow_wing-diffuser

Wing Flow Comparison - GIF Animation

fp-023d_pv_rr-wing_flap-m5deg_center-flow_wing

y-yosuke commented 7 years ago

Rr Wing Flap Angle - U Magnitude and Pressure Comparison

U Magnitude Comparison - GIF Animaiton

fp-023d_pv_rr-wing_flap-m5deg_u-mag_wing

Pressure Comparison - GIF Animation

fp-023d_pv_rr-wing_flap-m5deg_p_wing

y-yosuke commented 7 years ago

Rr Wing 2 Pieces and Lower Front Ride Height

RH90-110 / Rr Wing -10deg / Main 1.4 Flap 1.3 (Ride Height Front 90mm - Rear 110mm) Control : Rr Wing -10deg / Main 1.4 Flap 1.3 (Ride Height Front 110mm - Rear 110mm)

Body and Wheels

Coef.	RH110-110	RH90-110	Difference	Difference %
Cm	0.1020	0.0763	-0.0257	-25.2
Cd	0.6483	0.6419	-0.0064	-1.0
Cl	-0.2883	-0.3267	-0.0384	13.3
Clf	-0.0421	-0.0871	-0.0450	106.7
Clr	-0.2462	-0.2396	0.0065	-2.6
CoP	0.8538	0.7334	-0.1204	-12.0
L/D	-0.4447	-0.5090	-0.0643	14.5

Body Only

Coef.	RH110-110	RH90-110	Difference	Difference %
Cm	0.0834	0.0589	-0.0244	-29.3
Cd	0.4896	0.4857	-0.0039	-0.8
Cl	-0.3021	-0.3383	-0.0362	12.0
Clf	-0.0677	-0.1102	-0.0425	62.8
Clr	-0.2344	-0.2281	0.0063	-2.7
CoP	0.7759	0.6742	-0.1017	-10.2
L/D	-0.6170	-0.6965	-0.0795	12.9

y-yosuke commented 7 years ago

Summary

Diffuser
- Diffuser End 20mm Higher
- The front and rear downforces increase without increase of drag and these bring an Improve ment of L/D
- Diffuser Vertical Fins
- In these simulations these fins were not advantageous
Rr Bumper B
- Slightly increases the front downforce and decreases the rear downforce without the drag change
Rr Bonnet Horizontal Vane
- Slightly increases the front downforce and decreases the rear downforce without the drag change
Side Mirror
- Side Mirrorless
- 'Side Mirror' decreases the front downforce or increases the front lift force
- 'Side Mirror' seems bending the flow downward and generating the lift force
- Side Mirror 30mm Highter / 20mm Outer
- Slightly decreases the front and rear downforces without the drag changes
Rr Wing
- Main Plane 1pc Z+50mm
- Increases the rear downforce and decreases the front downforce
- Increases the drag slightly
- Two Pieces
- Main Plane 1.4 / Flap 1.3 32.7deg
  - Generates much larger rear downforce
  - Distribution of downforce is too far backward
  - At 'Control' angle it seems a flow separation appears on the main plane
- Main Plane 1.4 / Flap 1.3 27.7deg
  - Lower drag and lower downforces
- Two Pieces Rr Wing and Lower Front Ride Height
  - Distribution of downforce is towards front

y-yosuke / formula-ppoino