Effect of Burning Rate Modifiers on Subatmospheric Flame Temperatures of AP/HTPB Composite Solid Propellants
AbstractUsing 30 um. pt and Pt 13 percent Rh thermocouples, flame temperatures of uncatalysed andcatalysed ammonium perchlorate/hydroxyl-terminated polybutadiene (AP/lffPB) composite solidpropellants were measured under subatmospheric conditions. Ferric oxide F e 2 and copper chromite(CC) were the catalysts used. The study demonstrates that Fe2O3 catalysed propellant, notwithstandingits least combustion efficiency undt;r subatmospheric conditions and weak gas-phase flame, has themaximum burning rate enhancement. This is argued to be due to the increased surface and subsurfacereactions caused by Fe2O3. CC-catalysed propellant burns to the least subatmospheric pressure withminimum loss in combustion efficiency indicating that this class of propellant may be more suitablefor base-bleed applications.
Haugen, S; Oppegard, A. & Melby, K. Development and production of base-bleed grain
for 155 mm guns. International Symposium on Special Topics in Chemical Propulsion:
Base-Bleed First, 23-25 November 1988, Athens, Greece, edited by K.K.Kuo and J.N. Fleming,
Hemisphere, New York, 1991, pp.63- 78.
Gunriers, N .E. ; Anderson, K & Nilson, Y. Testing of parts and complete units of
Swedish-base-bleed system, base-bleed solid propellant. International Symposium on Special
Topics in Chemical Propulsion: Base-Bleed First, 23-25 November. 1988, Athens, Greece, edited
by K. K. Kuo and J.N. Fleming, Hemisphere, New York, 1991, pp. 251-70.
Lecoustre, M.; Gauchoux, J & Coupez, D. Base-Bleed solid propellant. International
Symposium on Special Topics in Chemical Propulsion: Base-Bleed First, 23-25 November
, Athens, Greece, edited by K. K. Kuo and J. N. Fleming, Hemisphere, New York, 1991,
Miller, M.S. & Holmes, H.E. Subatmospheric burning rate and critical diameters for AP/HlPB
propellants. J. Propul. Power, 1990,6,671-72.
Williams, F.A.; Barrere, M. & Haung, N.C. Fundamental aspects of solid propellant combustion. AGARD, 1969, Agardograph 116,p.318.
Krishnan, S. & Jeenu, R. Combustion characteristics of AP/HTPB propellants with ,burning rate modifiers. J Propul. Power, 1992, 8 (4),748-55.
Krishnan, S. & Jeenu, R. Subatmospheric burning characteristics of AP/CTPB propellants with
burning rate modifiers. Combustion and Flame, 1990,80, 1-6.
Krishnan, S. & Periasamy, C. Low pressure burning of catalysed composite propellants. AlAA
Journal, 1986, 10 (10),1670-75.
Gordon, S.; McBride, B.J. & Zeleznik, F.J. Computer program for calculation of complex
chemical equilibrium compositions and applications, supplement I -transport properties.
NASA, Washington D.C., October, 1984, NASA-TM-86855.
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