The method taken during this rfile is to attempt to give an explanation for, in a simplified demeanour, how a specific explosion mitigation method works. this can be then outfitted upon to explain the conditions within which the mitigation technique works and people situations the place it is going to now not paintings. the place attainable, examples might be used to demonstrate the thoughts being defined. This record is meant to hide measures that could be taken to mitigate an explosion or its effects. considering that a couple of those measures are activated on gasoline detection and ahead of ignition, the record features a qualitative dialogue of gasoline detection. this can be within the context of activities that may be taken while fuel is detected.
desk of Contents
1. creation and Scope
2. layout & popularity standards
three. activities on fuel Detection
four. Mitigation via Inhibiting Combustion
five. Explosion aid Panels (ERP's)
6. Combining Mitigation Measures
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Extra resources for Explosion Mitigation Systems
Hand calculations will often suffice, certainly in the first instance, but for a full design evaluation of a panel that is not supposed to detach in an explosion, the calculations will be quite extensive. Where NLFEA can be especially useful is for the documentation of the release pressure and buckling resistance under both wind and explosion l o d i g . This analysis can be essential for the new high speed light weight panels. new low hole density punched plate gratings are becoming popular because they inhibit vertical spread of flame.
Only then can a decision be taken as to whether the proposal is cost effective. It is suggested, however, that there are many combinations of systems and concepts yet to be developed that will be shown to have a low cost in relation to the reduction in risk that they result. Page 34 FABIG Technical Note - March 1994 Explosion Mitigation Systems 7. CONCLUSIONS Explosion mitigation is just part of the scientific and engineering practice that is evolving as the offshore industry attempts to make structures less at threat from gas explosions.
To do the explosion pressures evaluation properly requires the use of a gas explosion pressure simulation tool that can: a) work in the time domain; b) give information on the pressures local to the wall, not just at the worst point in the module; c) give information on dynamic drag pressures. The tools most capable of providing the requirec information are those based on computational fluic dynamics (CFD). However, even these tools can haw problems accurately representing the pressure changes a Page 31 Explosion Mitigation Systems ERP boundaries due to the fact that the boundary condition is in fact changing through time.