Enhancement of shock waves |
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Authors: | D Igra O Igra |
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Institution: | (1) Aerodynamics Group, RAFAEL, Haifa, Israel;(2) Department of Mechanical Engineering, The Pearelstone Center for Aeronautical Engineering Studies, Ben Gurion University, Beer Sheva, Israel |
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Abstract: | The flow field developed behind a shock wave propagating inside a constant cross-section conduit is solved numerically for
two different cases. First, when the density of the ambient gas into which the shock propagates has a logarithmic change with
distance. In the second, and the more practical case, the ambient gas is composed of pairs of air–helium layers having a continually
decreasing width. It is shown that in both cases meaningful pressure amplification can be reached behind the transmitted shock
wave. It is especially so in the second case. By proper choice of the number of air–helium layers and their width reduction
ratio, pressure amplification as high as 7.5 can be obtained.
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Keywords: | Shock wave Shock wave interaction with gas layers Pressure amplification |
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