Quote:
Originally Posted by theycallmeebryan
Hello fellow aero guros  (sounds funny when it all rhymes)
I was wondering what you guys think would be a normal RE for sea level, 70*F temp, at 65mph, on earth.
Does RE=6063710 sound about correct for the above conditions with a 10ft chord?
I'm trying to use DesignFoil's wind tunnel simulation to try to figure out the best fairing for my Ninja 250. I understand that the ground plays an important role on the horizontal aerodynamics of a shape. However, since my ninja is more tall than wide, most of the air will be deflected to the sides and not over top (however, certainly its still significant). |
The thing to keep in mind,is that for road vehicles,the critical Reynolds number is achieved at about 20-mph and the turbulent boundary layer is firmly established along with Cd.This will remain constant up to about 250-mph,where compressibility begins (transonic flow) and drag typically rises as a function of Mach number.---------- If your software gives you the choice of selecting laminar or turbulent boundary layer,go with turbulent,unless you intend to ride at velocities below 20-mph.