View Single Post
Bobcent is offline
Feb13-13, 02:36 PM
P: 31

I have some questions about the drag equation and aerodynamics:

[itex]F = \frac{1}{2}ρv^2CA[/itex]

I'm trying to calculate the atmospheric drag on a streamlined body (the drag coefficient will be a very small number) with a velocity of about 8 km/s at about 38,000 meters altitude, where the atmospheric density is only about [itex]5.4\times10^-3[/itex][itex]kg/m^3[/itex]. So my question is; is the drag equation valid even for these extreme values, or is there a better equation that I can use?

Secondly, which is the optimal geometrical shape for [itex]\frac{Volume}{Drag}[/itex]? Is it a streamlined body shape? If it is a streamlined body shape, what is the equation for calculating its volume, and what is the equation for calculating its reference area? Can't find it!

Really appreciate any help on this!
Phys.Org News Partner Physics news on
Better thermal-imaging lens from waste sulfur
Scientists observe quantum superconductor-metal transition and superconducting glass
New technique detects microscopic diabetes-related eye damage