on drag reduction for automotive vehicles
Brizotti, Patrick Rambaud and Florian Visentin
RESULTS with BLOWING CONTROL
and infleunce of the blowing velocity parameter
Here is how we modelised the blowing control system
with the aim of reducing the drag of the car. The blowing control
system is located at the right part of the rear window of the car as
you can see on the picture below . The width of the
blowing slit is 10E-3 m.
the right picture, the votices are represented and we notice that they
are broken by the blowing control system of which the blowing velocity
was the same as the velocity inlet. We also did the unsteady
simulations with the blowing velocity equal to twice the velocity inlet
to look at the influence of the blowing velocity parameter on the drag
reduction. The results that we got are summarized in the following link.
of the blowing control system on the pressure coefficient
These pictures represent the pressure coefficient Cp distribution. This
simulation was done with the blowing velocity equal to the velocity
inlet. The first picture corresponds to the result we got without
blowing system, and the second picture with the blowing system. We
notice that blowing from the slit increases the value of the pressure
the top and the right part of the rear car. This result means that the
destruction of the vortices by the blowing system involves a higher
pressure value along the surface where the vortices were located.