horse wrote:One thought that struck me after thinking about the new exhaust regulations was the potential for using radiator waste as diffuser augmentation. I think it's been discussed before, but there must be some potential for "cold blowing" from the radiator exits replacing the current route that the exhausts use. I wonder if the current McLaren design would be more suited to this, given it is sort of longer and flatter, as it were. Probably significant cooling implications, but don't Renault almost do this, except they exit above the diffuser rather than to the sides.
That wouldnt work if im correct.
I thought i read this somehwere that the exhaust flow is of high velocity and high energy thus can be used really effectively over and through the diffuser to generate downforce. The cooling air is not, this is effectively much lower speed and of less energy compared to exhaust flow. so 'dumping' the cooling flow into the diffuser is not efficient, actually you want to have none of that flow, that is why for example red bull dump it out of the back of the engine cover, they are blowing it in an area where barely anything happens.
Imo we can speculate that the way the renault is built that exiting it over the diffuser is actually aiding diffuser extraction but i think it is rather driven by making the beam wing more reachable for airflow