[KVRC] Khamsin Virtual Racecar Challenge 2016

[AratzH]

So nice to see some results. I will share mine too:
The drag and downforce performance predicted by the simulation are:
Total drag: 1456.81 N
Drag coefficient - Cd: 0.70
Drag area - Cd.A: 1.22 m2
Total Downforce: -7076.07 N
Downforce coefficient - Cl: -3.38
Downforce area - Cl.A: -5.90 m2

CoP of downforce: 1.838 m along streamwise (Y) direction from Y = 0.00 m.
KVRC Only: Corrected CoP of downforce: 1.744 m along streamwise (Y) direction from Y = 0.00 m.

The pressure at intake and exhaust are:
Engine intake, Area: 0.016m2 - Compliant
Surface integral of pressure: 11.67 Pa.m2
Engine exhaust, Area: 0.010m2 - Compliant
Surface integral of pressure: -0.68 Pa.m2
Cooling intake, Area: 0.401m2 - Compliant
Cooling exhaust, Area: 0.401m2 - Compliant
Differential of surface integral of pressure: 134.40 Pa.m2

I think I have a nice starting point, but definitively the porous medium I used to size the cooling was way off. I think I could cool a nuclear plant! Looking at your pictures I knew my cooling thing was "little" too big jaja.

Anyway, that leaves me room for improvement. Specially front down force, which in my case is greatly affected by cooling performance...

This year we are going to have a tight competition.... behind Variante apparently

[CAEdevice]

So nice to see some results. I will share mine too:
The drag and downforce performance predicted by the simulation are:
Total drag: 1456.81 N
Drag coefficient - Cd: 0.70
Drag area - Cd.A: 1.22 m2
Total Downforce: -7076.07 N
Downforce coefficient - Cl: -3.38
Downforce area - Cl.A: -5.90 m2

CoP of downforce: 1.838 m along streamwise (Y) direction from Y = 0.00 m.
KVRC Only: Corrected CoP of downforce: 1.744 m along streamwise (Y) direction from Y = 0.00 m.

The pressure at intake and exhaust are:
Engine intake, Area: 0.016m2 - Compliant
Surface integral of pressure: 11.67 Pa.m2
Engine exhaust, Area: 0.010m2 - Compliant
Surface integral of pressure: -0.68 Pa.m2
Cooling intake, Area: 0.401m2 - Compliant
Cooling exhaust, Area: 0.401m2 - Compliant
Differential of surface integral of pressure: 134.40 Pa.m2

Impressive data: your car is one of the most interesting at the moment.

[variante]

This year we are going to have a tight competition.... behind Variante apparently

Only virtually! Who knows how much downforce I'll need to sacrifice for the cooling requirements...

Also, I'm curious to see what JJR has produced. Last year he managed to reach 8300N (well balanced) since the first race. During the third and last high DF round, only Mantium matched JJR's performance (now up to 8800N)...

[TalnoRacing]

So following the trend, here is my data:

Total drag: 1511.97 N
Drag coefficient - Cd: 0.74
Drag area - Cd.A: 1.26 m2
Total Downforce: -6321.34 N
Downforce coefficient - Cl: -3.11
Downforce area - Cl.A: -5.27 m2

CoP of downforce: 1.875 m along streamwise (Y) direction from Y = 0.00 m.
KVRC Only: Corrected CoP of downforce: 1.763 m along streamwise (Y) direction from Y = 0.00 m

Engine intake, Area: 0.018m2 - Compliant
Surface integral of pressure: 11.41 Pa.m2
Engine exhaust, Area: 0.010m2 - Compliant
Surface integral of pressure: 0.74 Pa.m2
Cooling intake, Area: 0.102m2 - Not compliant !!!
Cooling exhaust, Area: 0.080m2 - Compliant
Differential of surface integral of pressure: 14.98 Pa.m2

[LVDH]

Thought I would dig out the results of the last iteration of last seasons car for comparison.

2015 Race 6 Car:

Drag: 1557.67 N
Drag coefficient - Cd: 0.75
Drag area - Cd.A: 1.30 m2
Downforce: -5619.42 N
Downforce coefficient - Cl: -2.71
Downforce area - Cl.A: -4.69 m2
CoP of downforce: 1.552 m along streamwise (Y) direction from Y = 0.00 m.
KVRC Only: Corrected CoP of downforce: 1.601 m along streamwise (Y) direction from Y = 0.00 m

2016 Pre-season Test Car:

Total drag: 1658.09 N
Drag coefficient - Cd: 0.80
Drag area - Cd.A: 1.38 m2
Total Downforce: -5745.69 N
Downforce coefficient - Cl: -2.78
Downforce area - Cl.A: -4.79 m2
CoP of downforce: 2.454 m along streamwise (Y) direction from Y = 0.00 m.
KVRC Only: Corrected CoP of downforce: 2.052 m along streamwise (Y) direction from Y = 0.00 m.

I think it could be a good base if the other concept I have doesnt work out. Some fine tuning of wing profiles should help with the efficiency.

Your cars have similar levels of downforce. But one has it more in front and the other one has it all in the rear. Maybe you should put the best parts of 2015 on your new car. Could be an easy way to improve it. Because now you are so tail heavy that the 2016 car is probably slower than the old one.

[RicME85]

Thought I would dig out the results of the last iteration of last seasons car for comparison.

2015 Race 6 Car:

Drag: 1557.67 N
Drag coefficient - Cd: 0.75
Drag area - Cd.A: 1.30 m2
Downforce: -5619.42 N
Downforce coefficient - Cl: -2.71
Downforce area - Cl.A: -4.69 m2
CoP of downforce: 1.552 m along streamwise (Y) direction from Y = 0.00 m.
KVRC Only: Corrected CoP of downforce: 1.601 m along streamwise (Y) direction from Y = 0.00 m

2016 Pre-season Test Car:

Total drag: 1658.09 N
Drag coefficient - Cd: 0.80
Drag area - Cd.A: 1.38 m2
Total Downforce: -5745.69 N
Downforce coefficient - Cl: -2.78
Downforce area - Cl.A: -4.79 m2
CoP of downforce: 2.454 m along streamwise (Y) direction from Y = 0.00 m.
KVRC Only: Corrected CoP of downforce: 2.052 m along streamwise (Y) direction from Y = 0.00 m.

I think it could be a good base if the other concept I have doesnt work out. Some fine tuning of wing profiles should help with the efficiency.

Your cars have similar levels of downforce. But one has it more in front and the other one has it all in the rear. Maybe you should put the best parts of 2015 on your new car. Could be an easy way to improve it. Because now you are so tail heavy that the 2016 car is probably slower than the old one.

Yeah I need to swap the front wing from the 16 car out for the 15 car front wing to see if that is where the balance difference is coming from.

[hollus]

Since you guys are already discussing ducting:
https://www.linkedin.com/pulse/air-duct ... eader-card

[variante]

Good link
Thanks

[AratzH]

Really interesting.... lots of optimization to do....

[Ft5fTL]

I need to reduce the drag somehow.

Total drag: 2164.39 N
Front wing(s) drag: 419.63 N
Rear wing(s) drag: 389.72 N
Drag coefficient - Cd: 1.02
Drag area - Cd.A: 1.81 m2
Total Downforce: -7642.17 N
Front wing(s) downforce: -2792.58 N
Rear wing(s) downforce: -1089.36 N
Downforce coefficient - Cl: -3.60
Downforce area - Cl.A: -6.37 m2
CoP of downforce: 1.776 m along streamwise (Y) direction from Y = 0.00 m.
KVRC Only: Corrected CoP of downforce: 1.713 m along streamwise (Y) direction from Y = 0.00 m.
The pressure at intake and exhaust are:

Engine intake, Area: 0.017m2 - Compliant
Surface integral of pressure: 13.93 Pa.m2
Engine exhaust, Area: 0.011m2 - Compliant
Surface integral of pressure: 0.75 Pa.m2
Cooling intake, Area: 0.104m2 - Not compliant !!!
Cooling exhaust, Area: 0.077m2 - Not compliant !!!
Differential of surface integral of pressure: -33.89 Pa.m2

[SR71]

Did anyone have massive problems when upgrading to the new one-click? I'm running 1.1-000

[CAEdevice]

Did anyone have massive problems when upgrading to the new one-click? I'm running 1.1-000

Hi, the lastest release is only running single core at the moment.

[SR71]

Did anyone have massive problems when upgrading to the new one-click? I'm running 1.1-000

Hi, the lastest release is only running single core at the moment.

Ok, is there a way to parallel install? I have 8 cores that can run the current one-click in about 3hrs.

How easy is amazon to set up? How long do those simulations usually take?

[CAEdevice]

Did anyone have massive problems when upgrading to the new one-click? I'm running 1.1-000

Hi, the lastest release is only running single core at the moment.

Ok, is there a way to parallel install? I have 8 cores that can run the current one-click in about 3hrs.

How easy is amazon to set up? How long do those simulations usually take?

I think Amazon is slower than your 8 cores... a single core run can require 8-9h

[Alonso Fan]

Hi, the lastest release is only running single core at the moment.

Ok, is there a way to parallel install? I have 8 cores that can run the current one-click in about 3hrs.

How easy is amazon to set up? How long do those simulations usually take?

I think Amazon is slower than your 8 cores... a single core run can require 8-9h

Does the time taken depend more on the size/complexity of the mesh or the actual analysis? Because I was getting 9-10hours with a single core run on my 6 core machine, and that was just on a front wing, not a whole car