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As the base‐bleed projectile flies out of the muzzle, the environmental pressure in the base‐bleed combustion chamber suddenly decreases and AP/HTPB base‐bleed propellant suffers intense unsteady combustion. To further study the unsteady combustion characteristics of base‐bleed propellants, a semi‐closed bomb as was designed experimental device and transient depressurization conditions of the muzzle...
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