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The explosion and fire incidents with buried gas pipelines are increasing globally e.g. San Bruno (USA, 2010), East Godavari (India, 2014) and Ludwigshafen (Germany, 2014) are only a few to quote. There are a number of parameters involved behind the occurrence of these incidents such as human mistake, intended efforts leading to major or minor leak, explosion due to depressurization, crater formation, spill of gaseous fuel in the nearby regions and pool/jet/crater fires. In continuation to [3] these parameters are investigated for Ludwigshafen incident in the present work. The semi-empirical and advanced CFD (Computational Fluid Dynamics) based models are utilized to assess the damages caused by the explosion overpressures. Recommendations are also provided on minimum safety distance to be considered for such pipelines to avoid/foresee/mitigate similar hazards in future.
The explosion and fire incidents with buried gas pipelines are increasing globally e.g. San Bruno (USA, 2010), East Godavari (India, 2014) and Ludwigshafen (Germany, 2014) are only a few to quote. There are a number of parameters involved behind the occurrence of these incidents such as human mistake, intended efforts leading to major or minor leak, ex-plosion due to depressurization, crater formation, spill of gaseous fuel in the nearby regions and pool/jet/crater fires. In continuation to [3] these parameters are investigated for Ludwigs-hafen incident in the present work. The semi-empirical and advanced CFD (Computational Fluid Dynamics) based models are utilized to assess the damages caused by the explosion overpressures. Recommendations are also provided on minimum safety distance to be consid-ered for such pipelines to avoid/foresee/mitigate similar hazards in future.
Shock tube systems are non-electric explosive fuses employed in blasting and demolition applications to trigger the detonation of explosive charges. Their working principle is based on the explosive reaction of a fine explosive powder on the tubing's inner surface, generating a shock wave traveling at a velocity of 2,100 m/s along the length of the tube, without destroying it. One of
the key aspects of the manufacturing process of these shock tubes is the size and morphology of the explosive powder grains and their distribution on the inner wall of the tube, in order to propagate the shockwave efficiently and reliably. For the first time, synchrotron X-ray computed tomography has been used to characterize non-destructively the explosive powder grains, typically Al/HMX between 10 and 20 μm in size, in terms of morphology and 3D distribution but also to characterise the presence and location of defects
within the shock tube walls.