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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.142 SNIP: 0.16 CiteScore™: 0.29

ISSN Imprimir: 2150-766X
ISSN On-line: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.530
pages 559-573

COMBUSTION BEHAVIOR AND THERMOCHEMICAL PROPERTIES OF JA2 PROPELLANT

C. Kopicz
Department of Aerospace Engineering, The Pennsylvania State University, University Park, PA 16802
T. J. Watson
Department of Mechanical Engineering, The Pennsylvania State University, University Park, PA 16802
Stefan T. Thynell
Department of Mechanical Engineering, The Pennsylvania State University University Park, PA 16802

RESUMO

JA2 is a commonly used gun propellant for various weapon systems. Knowledge of its combustion behavior is useful for system design application. The burn rate of JA2 propellant was determined as a function of pressure, 0.69 ≤ p ≤ 41.4 MPa (100 ≤ p ≤ 6,000 psi), and initial temperature, 25°C ≤ Ti ≤ 60°C. Burn rate plot shows slope breaks at 6.9 MPa (1,000 psi) and 4.5 MPa (650 psi) for the initial temperatures of 25°C and 60°C, respectively. At high pressures, P > 40 MPa (6,000 psi), measured burn rates were found to agree with the Army's closed bomb data. The steady-state burn rates also agreed with the instantaneous burn rates obtained from X-ray radiography measurement conducted at various chamber pressurization rates. The burning surface temperature and temperature sensitivity (σp) were also deduced. The rapid decay of σp with an increase in pressure for p < 20 MPa and extremely low values of σp at pressures greater than 20 MPa explains the lack of dynamic burning of JA2 propellant.


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