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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Imprimer: 2150-766X
ISSN En ligne: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.590
pages 563-575

BURNING RATE CHARACTERIZATION OF OXSOL LIQUID OXIDIZER

George C. Harting
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802, USA
J. W. Mordosky
Department of Mechanical and Nuclear Engineering The Pennsylvania State University, University Park, PA 16802 USA
Baoqi Zhang
Department of Mechanical and Nuclear Engineering The Pennsylvania State University, University Park, PA 16802 USA
T. T. Cook
Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, PA 16802 USA

RÉSUMÉ

Characterization of the burning behavior of OXSOL liquid oxidizer (70% HAN, 15% AN, and 15% H2O by weight) was performed in transparent test tubes in a windowed liquid propellant strand burner. The burn rate of OXSOL was deduced from the regression history of the liquid surface. The burn rate was found to be a function of test tube diameter and ranged from 40 to 550 mm/s for the pressure range of 2.5 to 20 MPa. OXSOL exhibited two slope breaks with a pressure exponent near 2.9 for 2.5<P<5 MPa, 0.4 for 5<P<9 MPa, and −0.8 for P<9 MPa. The effect of tube diameter on the burning rate of OXSOL is believed to be due to hydrodynamic instability of the burning surface. Additionally, the combustion product gas temperatures were measured to range from 500−650 K as a function of pressure. The burning rate slope break at 5 MPa was found to be very close to the slope break at 5.5 MPa in the plot of the ratio of heat of vaporization to the boiling point of water versus pressure. This similarity in slope break implies the importance of the water vaporization process in the low-pressure combustion of OXSOL. According to Levich's stability analysis, the influence of liquid viscosity and gravity is stabilizing. Without a sufficient level of liquid viscosity to stabilize the liquid burning surface, the planar burning of OXSOL is intrinsically unstable for the test conditions studied.


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