Abstract
Effects of nondimensional vent area (Kv: 4.17– 58.63) and static activation pressure (Pstat: 0.6 bar ~2.5 bar) on venting pressure are investigated. For internal pressure, the increase of Kv would significantly enhance the frequency of pressure oscillation and the elevation in Pstat would enhance the effect of induced turbulence. The equilibrium relief range with different particle sizes was clarified, and the dynamic mechanism was revealed. An empirical prediction model and an optimal design range of relief efficiency were proposed. For external pressure, the external explosion was verified by two pressure waves captured in the BOS images. The enhancement of Pstat and Kv would promote the development of external explosion within a certain range. The attenuation of external pressure with distance relies on the product of explosion source intensity and size, and the trend of recession index with variable venting conditions resembles the external explosion pressure.
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