Quote:
Originally Posted by aerohead
I never said I like it. I'll dig through my rat's nest and see if I can trace it down.
I've made transcription errors before.
Thanks for flagging it.  |
It just seems very strange to me that you endlessly quote Hucho 2nd edition in support of your theories, but get wrong something as basic as how Reynolds Numbers are calculated.
Hucho 2nd ed page 49:
[The Reynolds number] is a function of the speed of the vehicle, the kinematic viscosity of the fluid and a characteristic length of the vehicle eg its total length as in Figure 2.2.
(And Fig 2.2 shows vehicle length exactly as we'd expect - front of vehicle to back of vehicle.)
No mention of area, and certainly no mention of working out length from area.
Incidentally, for people testing and modifying the aero of their car, Reynolds Numbers can basically be ignored. They only become relevant when different size models are being used. The only time I've ever had to pay attention to Reynolds Numbers is when calculating wing downforce / lift from wind tunnel aerofoil data.