some interesting documents
 

tapered body https://dspace.lboro.ac.uk/dspace-js...13-01-0462.pdf

box cavity on SUV

https://pure.strath.ac.uk/portal/fil...ints008190.pdf

:rolleyes:I remember now why I wasn't a science/engineer major......:confused:

an experimental study of automotive underbody diffusers

https://www.google.it/url?sa=t&rct=j...14733917,d.bGg

Thanks.

The 'box cavity' paper seems more related to Coanda nozzles. I'm curious about the 45° and 60° angles cited and the shape of the outlets.

The tapered body paper looks to be of interest to the pickup truck aerocap builders.

The diffuser paper I will have to find time for later. :thumbup:

Edit: I'm halfway through the diffuser paper. Most interesting so far

• Figure 2-2-2 which shows strategies for simulating a moving roadbed. The conclusion is that with a fixed roadbed you can compare but not quantify features.
• Particle Image Velocimetry (PIV) measurements as shown in Figure 2-2-8, which uses laser light sheets and atomized olive oil to reveal and record flow within a field of view.