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Homework Help: Gas Dynamics (Compressible Flow) Normal Shock Wave

  1. Dec 12, 2012 #1
    1. The problem statement, all variables and given/known data

    Suppose that a blast wave, which might have been initiated by an atomic bomb explosion, is traveling through air at standard atmospheric conditions with a speed of 60,000 m/s
    find change in ( pressure , temperature , stagnation pressure , velocity ) produced by the wave with respect to an observer who is stationary with respect to the undisturbed air.

    2. Relevant equations

    v= M*sqrt(gamma*R*T)

    isentropic tables & Normal Shock Wave Tables.

    3. The attempt at a solution

    i'm trying to use the equation v=M sqrt(gamma*R*T) with air p=103.5 kpa , T=298K , but i can't seem to understand the problem , since i get M=180 which is obviously wrong.
  2. jcsd
  3. Dec 13, 2012 #2


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    Staff Emeritus
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    The shock wave is traveling at 60000 m/s, and the speed of sound is approx. 340 m/s.
    M = 180 is about right.
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