Quote:
Originally Posted by slipknotsv
Mr. aerohead please comment  |
Scientifically,and from empirical research in wind tunnels,the lowest drag nose,for sub-sonic,incompressible flow,is half of a convex hemisphere,or,'bulbous' nose.
It allows for essentially-ideal,symmetrical, uniform streamline acceleration,directing,over and around the body.with a minimum of surface area (friction),and absence of pressure spikes,with full attachment,and enough camber to set up divergent aft-body flow.
Here it is in 2-D flow
Notice the effect of the aft-body.
Once it reaches supercritical Reynolds number (20-mph with a car),there's full attachment right into the aft-body.(3-D flow)
Here it is underwater
It's perfect!
Here's the origin of the perfect subsonic shape,dating to as early as 1898,with Gustav Eiffel and his famous vertical wind tunnel,Eiffel Tower in Paris.(think ice cream cone)
Today
Other popular topics in this forum...
