Blast-Actuated Closure Valves for Personnel-Type Shelters

摘要

Three types of personnel-shelter blast-closure valves were tested. The measured downstream bypassed pressures were about 15, 20, and 24 psig for incident shock pressures of 28, 31, and 40 psig, respectively, and were independent of the types of valves and their closing times. (Pressures within the shelter would be considerably less.) The results of the experiments suggest that a shock pressure of the order of a few milliseconds in duration would yield a comparable peak bypassed pressure immediately downstream of the valve whether the moving type closures studied were permitted to travel to the seat or were maintained in an open position (as a baffle) throughout the duration of the shock. An analysis was carried out capable of predicting the peak downstream leakage pressure. (Author)