Multiphase CFD Simulation of Solid Propellant Combustion in a Small Gun Chamber

Table 3

Effect of weight charge on interior ballistic performance.

	Computed values
	Solid propellant mass (g)
	Min. charge					Max. charge	Overcharge
	0.190	0.201	0.212	0.223	0.234	0.245	0.256
Maximum average chamber pressure (MPa)	169.54	180.99	192.3	203.67	215.28	227.49	239.32
Maximum average breech pressure (MPa)	170.07	181.65	193.13	204.67	216.41	228.89	240.83
Maximum average mouth case pressure (MPa)	169.13	180.52	191.76	203.04	214.53	226.56	238.21
Maximum average shot base pressure (MPa)	168.5	179.91	191.1	202.26	213.6	225.49	237.14
Shot muzzle velocity (m/s)	284.76	295.35	305.09	314.48	323.54	332.72	341.2
Shot exit time (ms)	0.957	0.920	0.887	0.857	0.829	0.802	0.779