Burning Rate of Composite Propellants under the Conditions of Strain

Songqi Hu; Jing Chen; Guanjie Wu; Yingji Liu; Yijin Hua

doi:10.1515/tjj-2014-0004

Article

Burning Rate of Composite Propellants under the Conditions of Strain

Songqi Hu , Jing Chen , Guanjie Wu , Yingji Liu and Yijin Hua

Published/Copyright: April 26, 2014

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From the journal International Journal of Turbo & Jet-Engines Volume 31 Issue 4

Abstract

In this work, a correlation between propellant burning rate and strain was established. In order to investigate the effects of strain and pressure, and to measure burning rate of composite propellants, a novel apparatus was designed and prepared. Burning rates of three formula composite propellants under different pressures and strains were measured using such device. Based on the measurements, a model for the analysis on the experimental results was proposed. It was demonstrated that the model corresponded with the experimental data if the propellant samples were under tensile strain increasing from 0 to 20%. Burning rate ratio and tensile strain obeyed the quadratic relationship, burning rate increased with strain, but there was no mutation in less than 20% deformation. Furthermore, burning rate ratio of composite propellants which had low Poisson ratio increased fast as tensile strain decreased. And the less binder component of composite propellants, the burning ratio changed more significantly under a given strain state. In addition, as the exposed area increased, the burning rate ratio became larger.

Keywords: composite propellant; binder; burning rate; tensile strain; porosity; interstice

PACS: 44.20.+b

Published Online: 2014-4-26

Published in Print: 2014-12-1

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Articles in the same Issue

https://doi.org/10.1515/tjj-2014-0004

Keywords for this article

composite propellant; binder; burning rate; tensile strain; porosity; interstice