0
$\begingroup$

Suppose we have the ambient air pressure, density, speed of sound and blast overpressure. How can we use this data to get the speed of the blast wind?

Currently I simply assume that 50% of the wave's energy is kinetic, an assumption that worked for water waves, so dynamic pressure = overpressure. How right is this?

Improve this question
$\endgroup$
5
  • $\begingroup$ Have you heard of the Sedov blast wave or of self-similar solutions? $\endgroup$
    – Kyle Kanos
    Commented Jan 22 at 14:03
  • $\begingroup$ @KyleKanos I checjed it out but I want something that works when overpressure is comparable to ambient pressure $\endgroup$
    – Abdullah is not an Amalekite
    Commented Jan 23 at 8:33
  • $\begingroup$ Well I suppose it wouldn't be much of a "blast" if the pressures are comparable, but the Sedov solution could still be used to give you an approximation (though probably a weak approximation at that). $\endgroup$
    – Kyle Kanos
    Commented Jan 23 at 11:59
  • $\begingroup$ @KyleKanos I am trying to prove that long period blast waves can cause the same damage for a much lower overpressure. $\endgroup$
    – Abdullah is not an Amalekite
    Commented Jan 24 at 2:47
  • $\begingroup$ So you want to distribute the same total energy but (effectively) have one scenario be a driven process instead of a single release of energy? Seems to me that you might have to run some simulations to test that; any 1D hydro code ought to suffice for testing. $\endgroup$
    – Kyle Kanos
    Commented Jan 27 at 15:41

0

Reset to default

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Browse other questions tagged or ask your own question.