Explosion venting and its external damage effect of spherical vessel

The explosion venting experiment test system consisted of small spherical vessel and big spherical vessel was establised to study the spherical vessel explosion venting and its external damage effect. To study the pressure in the spherical vessel, unrestrained deflagration venting and constrained deflagration venting experiments were carried out by two sizes of spherical vessels. The conclusions are as follows: with the increase of the diameter of the venting port, the maximum explosion pressure decreases, and with the decreases of the pressure rise rate, the positive pressure duration decreases. When the dimensionless pressure relief ratio changes slightly, and the spherical vessel does not contain a rupture disk, the peak value of the pressure decreases linearly with the increase of the pressure relief radio. In order to study the external damage effect of the venting explosion, explosion venting experiments were carried out by two sizes of spherical vessels. The pressure at different locations of the space around the venting port of the big and small spherical vessels was measured. Combined with the overpressure damage threshold standard, the external damage effect on people was judged and the scope of the injury of the pressure shock wave delimitted.