CFD Simulation of Self-Made Double DRS CAD Model

[CFD simulation of self-made double DRS CAD model]

by using Onshape for CAD design, and Simscale for CFD simulation.

Simscale link: https://www.simscale.com/projects/cfdplayground3/ddrsproject/

more info: 

k-w SST(steady state)

10~11M cells for mesh

nonorthogonality: < 89 

number of used nonorthogonal corrector: 1(2 would've been better but... I didn't know about it well then.)

volume ratio: < 60

aspect ratio: < 43

Analysis done on 10.01.2022(dd/mm/yyyy)

(thumbnail)

- DRS actuation

L: DRS Shut, R: DRS Open

There is no difference between the two models except DRS pivoting.





- active boundary layer control pipeline for intended front wing stall







- mesh and enclosure

Note that Simscale offers very few options for meshing. Also, no.1 priority is to generate a mesh as light as possible so that the simulation can end within maximum runtime limit(30000 seconds are allowed for one simulation run in Simscale Community plan(free version)). 

- simulation result

For all sets of pictures below, left one is when DRS is shut, right one is when DRS is opened.

: Y-plane(on the mid-section of the front wing)

: particle trace

: part color - pressure 

:  pipeline inner velocity (L: 0.0000136424m/s, R: 2.66477m/s)

- comprehensive result

	DRS Shut	DRS open
Fwing Downforce / Drag	100N / 30N	79N / 24N
Rwing Downforce / Drag	152N / 48N	55N / 10N

: Intended front wing stall by active boundary layer control is successfully simulated and it has visibly reduced front wing drag.

It is expected to give some advantage in terms of qualifying setup, or maybe better overtaking capability on race day.