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Updated: Jul 2, 2025

Blast Quantification Using Hopkinson Pressure Bars
Published on: July 5, 2016
On the pressure wave emanating from a deflagration flame front
V Bisio1,2, F Montomoli1, S Rossin2
1Department of Aeronautics, Imperial College London, SW7 2AZ, UK.
Abstract:
We consider a spherical flame expanding from an ignition point through a homogeneous, flammable gaseous mixture. We analytically predict the transient pressure and velocity fields ahead of the flame as a function of the flame front position, which is assumed to evolve in time according to a power-law relation. The predictions are successfully validated by CFD simulations. We show that the model is also effective for analyzing real deflagration problems, by predicting measurements taken in hydrocarbon deflagration tests.
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