wesley123 wrote: ↑30 Jun 2022, 20:55
Scorching would be from heat effects, not the path the airflow takes.
It depends. If it's due to local heat-soaking then the bodywork parts closer to the exhaust manifold would tend to scorch more. However, the scorched part is way behind even the exhaust outlet and becomes more severe in the bulkier part. As a result, I come to believe it is due to the high-temp exhaust flow making direct contact with the bodywork, especially under yaw.
Here's also a vorticity sim of the same vehicle under straightline and yaw conditions. Seems like there's a part of the exhaust flow that stays attached to the bodywork behind the outlet for a distance, even at 0 degrees of yaw. The same happens for up to at least 15 degrees of yaw, which is a common working condition in mid-to-low speed corners.
Source:
https://www.youtube.com/watch?v=pREgFVRXeDI
