关键词: 固体推进剂;燃烧催化剂;双基推进剂;燃烧性能

Abstract: In order to investigate the effect of 2,4-Dihydroxylbenzoate(β-Bi)on the combustion of double-base propellant,the combustion law of the propellants containing β-Bi was studied by means of the single frame amplification photography,П miniature thermocouple,the scanning electron microscopy(SEM) and the LINK ISIS energy spectrum.The results show that: β-Bi is a good burning catalyst of double-base propellant and possesses an excellent ability to reduce pressure exponent.Especially,when β-Bi together with a little carbon black(CB) or copper salt is used,the catalytic effect is better;the flame structures of the double-base propellants containing β-Bi are similar to the typical plateau double-base propellant,but the combustion temperature distribution has been changed because of adding the β-Bi;and the active components of catalysts deposit on the burning surface of propellants and the quenched surfaces of propellants with various catalysts possess different structure.

Key words: Solid propellant;Combustion catalyst;Double-base propellant;Combustion performance