Research Article

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

Table 1

Materials properties and operating conditions.

ParameterValue

Geometry
 Length of combustion chamber, 13.55 mm
 Camber diameter, 9 mm
 Length of barrel, 150 mm
 Barrel diameter (caliber), 9 mm
Physical properties
 Projectile mass, 8.00 g
 Propellant mass, 0.245 g
 Initial propellant particle diameter, 0.300 mm
 Propellant density, 600 kg/m3
 Propellant heat of combustion, 1.135 MJ/kg
 Specific heat of propellant, 120.32
 Thermal conductivity of propellant, 0.0164 W/m/K
 Specific heat of gas at constant pressure, 1858 J/kg/K
 Specific heat ratio of gas, 1.24
 Viscosity of gas products, 0.134064 ( /298)1.5/( + 110) kg/m/s. [7]
 Conductivity of gas products, 0.05225 ( /700)0.7 J/s/m/K. [27]
Constitutive laws
 Coefficient in burning law, 2.0 × 10−9 m/s/
 Exponent in burning law, 1.02
 Coefficient in burning law, 0
 Engraving pressure, 40 MPa
Numerical data
 Number of initial cells, 70
 Time step, 10−07−10−09 s