Abstract
A number of experiments have been performed with blast waves arising from the ignition of homogeneous and well defined mixtures of methane, oxygen and nitrogen, contained within spherical balloons with controlled initial dimensions.
The pressure characteristics has been studied for blast waves with and without influence from reflected waves.
The influence of obstacles in the flow field has also been treated. Both configurations with one box and two closely spaced boxes have been considered, and a wave-wave interaction phenomenon was observed in the case of closely spaced obstacles. Moreover reflection coefficients have been established and some pressure variations over the surfaces have been observed.
An acoustic approximation has been used to model the blast wave originating from an expanding sphere. It has been demonstated, that the generated pressure pulse is very sensitive to the expansion rate. Calculated and measured data have been compared, and a reasonable agreement has been found.
The pressure characteristics has been studied for blast waves with and without influence from reflected waves.
The influence of obstacles in the flow field has also been treated. Both configurations with one box and two closely spaced boxes have been considered, and a wave-wave interaction phenomenon was observed in the case of closely spaced obstacles. Moreover reflection coefficients have been established and some pressure variations over the surfaces have been observed.
An acoustic approximation has been used to model the blast wave originating from an expanding sphere. It has been demonstated, that the generated pressure pulse is very sensitive to the expansion rate. Calculated and measured data have been compared, and a reasonable agreement has been found.
| Original language | English |
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| Place of Publication | Roskilde |
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| Publisher | Risø National Laboratory |
| Number of pages | 144 |
| ISBN (Print) | 87-550-1122-5 |
| Publication status | Published - 1985 |
| Series | Denmark. Forskningscenter Risoe. Risoe-R |
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| Number | 525 |
| ISSN | 0106-2840 |
Keywords
- Risø-R-525
- Risø-R-525(EN)
- Balloons
- Configuration interaction
- Experimental data
- Explosions
- Homogeneous mixtures
- Methane
- Nitrogen
- Oxygen
- Pressure management
- Reflection
- Simulation
- Wave propagation