|August 3, 2009, 12:23||
How does one vary Mach number and dynamic pressure independently in a wind tunnel
Join Date: Aug 2009
Posts: 1Rep Power: 0
I am newbie to fluid dynamics. How does one vary Mach number and dynamic pressure independently in a wind tunnel. i want to repeat the same in CFD.
|August 3, 2009, 13:00||
Join Date: Mar 2009
Posts: 24Rep Power: 10
Pt = Total pressure
P = Static pressure
gamma = ratio of specific heats (1.4 for air)
Mach = Mach number
Change your static pressure, and you can adjust your total pressure & mach number semi-independantly of each other.
If your doing this in a wind-tunnel, you obviously need a pressurised tunnel.
Beware of Reynolds effects while doing this however. Matching compressibility effects with Reynolds effects on a scaled tunnel model is not possible*.
*at least, not that I'm aware.
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