PROCESSES IN THE VESSEL DURING BLEVE EFFECT

摘要

In the last fifty years, more than twenty great accidents with storage tanks, rail tank cars and road tankers filled with pressurized gases with death toll more than one hundred people, passed there. BLEVE - boiling liquid expanding vapour explosion - is a type of this incident, when containment (the cover of pressurized gas) is loosed The paper contains results of literature recherche, which displays some important findings about recent research of BLEVE: I) Now it is known that there are several types of accidents, which are very different in consequences and magnitude of claims in dependence on circumstances before rupture of the vessel like temperature and pressure, degree of filling, rigidity of cover and creation of leak or hole before rupturing, 2) However, the mechanism of last processes before rupture passes inside the vessel is not still exactly clear. This process was summarized and specified on grounds of literary sources. In the text, there is a suggestion of a possible scenario of the processes proceeding in the vessel and its description. Definition of this mechanism is important for explanation and prediction of blast and pressure effects in different starting conditions. For contribution to resolve this problem, a special apparatus was designed that can measure liquid behaviour in conditions of high pressures and temperatures similar to those in real propane and butane vessels engulfed in fire, and can visualize the processes inside the vessel with the help of endoscope-camera system.