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Flame structure of ADN/HTPB composite propellants by Oleg P Korobeinichev; Alexander A Paletsky is a Engineering article available to read on EtoBox.

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Visual flame characteristics, burning rates, and final flame temperatures for propellants based on ammonium dinitramide (ADN) and hydroxyl-terminated polybutadiene (HTPB) at different HTPB concentrations (3-20%) have been studied at pressures of 0.05 to 0.6 MPa. The flame structure was studied by probing molecular-beam mass-spectrometry, thin thermocouples, and video recording. The burning-zone width at 0.1 MPa was ϳ1.5 mm. Thermocouples revealed temperature fluctuations of about Ϯ400 K at 0.1 MPa in the flame zone within 1.5 to 4 mm from the burning surface. Along with temperature fluctuations, fluctuations also occurred in the intensities of the mass peaks of mass spectra of samples withdrawn from the flame. These are a consequence of the nonhomogeneous and nonstationary combustion of the propellant. Video recordings revealed the existence of several brightly luminous flame jets (torches) of about 1 mm in diameter at the burning surface, disappearing from one site and re-appearing at another. Combustion products were found remote from the burning surface and in its immediate vicinity by using molecular-beam mass spectrometry. The reactions in the condensed phase (mainly the ADN d

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Author

Oleg P Korobeinichev; Alexander A Paletsky

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0010-2180)

Published

2001

Language

EN

Field

Engineering (Physical Sciences)