ON THE ADEQUACY OF NUMERICAL CODES FOR THE SIMULATION OF VAPOUR CLOUD EXPLOSIONS. PART I
Three spherically symmetric blast simulation codes have been evaluated: a low flame speed model (Piston model) and two gas dynamic blast simulation codes (BLAST and CLOUD). Self-similar flow fields in front of constant velocity flames and large- and small-scale spherically symmetric explosion experiments were simulated. Broadly speaking the Piston model can be used for the simulation of spherically symmetric explosions at flame speeds < 100 ms**-1 whereas BLAST and CLOUD are adequate for flame speeds exceeding 100 ms**-1. An adapted Piston code has been investigated with respect to the capability of simulating blast due to explosions of pancake-shaped clouds. Comparison with an acoustic approach showed that the Piston model can be regarded as an acoustic model with the possibility of handling every imaginable flame path. Results of simulations of explosion experiments were less satisfactory although the wave shape is well reproduced. More experimental verification is needed to substantiate conclusions on pancake-shaped clouds.
Bibliographic Reference: EUR 9541 EN (1984) MF, PART I, 100 P., BFR 240, BLOW-UP COPY BFR 500, EUROFFICE, LUXEMBOURG, POB 1003
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Record Number: 1989123031700 / Last updated on: 1987-01-01
Available languages: en