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Combustion problems of nitramine propellants

Kumar, R. N. and Strand, L. D. (1975) Combustion problems of nitramine propellants. AIAA Papers, AIAA 75-239. American Institute of Aeronautics and Astronautics . http://resolver.caltech.edu/CaltechAUTHORS:20101216-143236750

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Abstract

This report summarizes a theoretical investigation of the current problems of nitramine (composite) propellant combustion. This study has, as its distinctive feature, a detailed examination of the condensed-phase processes in the combustion of nitramine propellants. As a consequence of a recently developed model for the combustion of ammonium perchlorate (AP)/ composite propellants, it is hypothesized that the condensed-phase degradation of the nitramine oxidizer particles to a vaporizable state is the overall rate-limiting step. It is also assumed that the gas-phase details are secondary in importance and need be studied only to the extent of supplying the correct boundary conditions on the condensed-phase/vapor-phase heat transfer. Because of our imprecise understanding of the gas-phase processes in the presence of combustion, several plausible models are considered for the gas phase. It is found that all of the gas -phas e models considered lead to predictions sufficiently clos e to experimental trends for us to conclude that the precise details of gas -phase processes are not of critical importance in determining propellant combustion behavior. More to the point, we are led to believe that a thorough examination of the condensed-phase details may be sufficient in itself not only to interpret most of the available data on experimental regression rate vs. pressure of nitramine propellants but also to aid in the formulation of propellants to suit our needs.


Item Type:Report or Paper (Report)
Additional Information:© 1975, American Institute of Aeronautics and Astronautics. Work performed by the Propulsion Division of the Jet Propulsion Laboratory and funded by the Eglin Air Force Base, Guns and Rockets Division, under MIPR No. FY 7621-73-90062. Technical direction was provided by Lt. W. S. Bulpitt and Mr. O. K. Heiney of the Air Force Armament Test Laboratory, Eglin Air Force Base. Senior Research Fellow, Guggenheim Jet Propulsion Center.
Group:Guggenheim Jet Propulsion Center
Funders:
Funding AgencyGrant Number
Eglin Air Force Base, Guns and Rockets DivisionMIPR FY 7621-73-90062
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion CenterUNSPECIFIED
AIAA75-239
Record Number:CaltechAUTHORS:20101216-143236750
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20101216-143236750
Official Citation:Combustion problems of nitramine propellants. KUMAR, R. N., California Institute of Technology, Jet Propulsion Laboratory, Pasadena, Calif.; STRAND, L. D., California Institute of Technology, Jet Propulsion Laboratory, Pasadena, Calif. AIAA-1975-239
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21408
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:20 Dec 2010 18:57
Last Modified:26 Dec 2012 12:46

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