THE EFFECTS OF FLUORINE-CONTAINING ADDITIVES IN COMPOSITE PROPELLANTS WITH BORON AND ALUMINUM DODECABORIDE ON THE CHARACTERISTICS OF THEIR COMBUSTION

The screening method has been used to investigate the eff ects of magnesium fl uoride, polytetrafl uoroethylene, and ammonium hexafl uorotitanate additives in a composite propellant on the basis of boron or aluminum dodecaboride as a fuel (37%), ammonium perchlorate as an oxidizer and an active binder on the parameters of propellant combustion. At pressures of 1.2 and 2.4 MPa, propellant combustion rates were measured, samples of condensed combustion products were taken, and burning residue in the form of a carcass was investigated. Using the cerimetric method of chemical analysis of the selected combustion products, incompleteness of propellant combustion was indentifi ed and the effi ciency of its energy release was evaluated. It is shown that the addition of small quantities (1%) of the said substances to the propellant makes it possible to control the velocity of its combustion and, in some cases, to raise the effi ciency of energy release.
   
Author:  O. G. Glotov, V. V. Zamashchikov, G. S. Surodin, N. S. Belousova
Keywords:  ramjet engine, composite propellant (propellant mixture), boron, aluminum dodecaboride, magnesium fl uoride, polytetrafl uoroethylene, ammonium hexafl uorotitanate, combustion velocity, condensed combustion products, selection method, completeness of combustion, cerimetric analysis, energy extraction effi ciency
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