hollus wrote: ↑
Wed Oct 09, 2019 5:38 am
It is awesome when you MVRC guys publish these changes in the open. Very thought inspiring! Thanks!
As the other guys are busy trying to win the challenge they're not quite so open, but sometimes a little prodding opens them up... as I'm on the admin side I have nothing to lose...
Any reason why those plumes from the top of the sidepods cannot be directed outwards as well as upwards, thus clearing the rear wing and maybe, just maybe, hitting the rear tires?
Here's my thinking why I put the holes on top.
In Round 1 I was under-powered due to lack of cooling flow.
Round 2 was the same arrangement with a bigger inlet and a bigger heat exchanger -achieved by tilting it more forward and making it longer, hence more frontal area. This second round car had less
So by a process of deduction it seems that the driving factor was not the Heat Exchanger size, nor the sidepod opening area, but in fact the tight "S" shaped flow path through the heat exchanger itself, as depicted in the first image below. To solve this the simplest solution was to cut the top off the sidepod and use more upright heat exchangers letting the air follow a much less restrictive (Bigger "S") flow path... (lower image).
It has worked far better than i expected (in terms of cooling flow)!
Cutting the holes in the side of the sidepod would've actually added an additional
tight bend in the flow path... unless I had rearranged the heat exchangers so they are angled in the horizontal plane, rather than the vertical plane... but that's currently not allowed in the rules....
As others have suggested; adding some guide fins/louvres on top of the holes will be the next step: I now have lots of excess cooling flow to play with!