Parachute Inflation and Opening Shock
Parachute Inflation and Opening Shock
Parachute Inflation and Opening Shock
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Unsteady Flow Force<br />
• The unsteady fluid force on a body in onedimensional<br />
motion is<br />
F<br />
x<br />
=<br />
−<br />
d<br />
dt<br />
⎛ ∂T<br />
⎜<br />
⎝ ∂V<br />
dV<br />
dt<br />
• For a sphere, A x can be written<br />
x<br />
⎞<br />
⎟<br />
⎠<br />
Cax = 0.5 (apparent mass coefficient)<br />
Rp = parachute radius<br />
=<br />
−<br />
A<br />
4<br />
A x =<br />
Cax<br />
ρ π R<br />
3<br />
x<br />
3<br />
p<br />
x<br />
<strong>Parachute</strong> <strong>Inflation</strong> <strong>and</strong> <strong>Opening</strong> 22
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