Performance Modeling for Explosively Actuated Valves

摘要: A mathematical model is formulated for the time-dependent operation of an explosively actuated valve that can be used as engineering tool to quickly assess leading order eects design modications on performance. The tracks evolution explosive and gas product mass thermal energy in response combustion, o w between internal components, heat transfer with surroundings, work performed by pushing initially tapered, deformable piston into a constant area bore enabling desired uid through conduit. An important feature coupling combustion elasto-plastic structural deformation mechanics arising from high pressure piston-housing interactions. correlated inert quasistatic compression data provide estimate force required actuate valve. Preliminary predictions peak within expansion chamber ( 250 MPa), nal velocity 150 m/s), actuation time 75 s) agree well experimental observations. strain hardening behavior piston, chamber, sliding friction at interface are shown strongly inuence device operation.