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首页> 外文期刊>Combustion and Flame >Effect of azide polyether pyrolysis property on combustion and heat release of boron-based fuel-rich propellant
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Effect of azide polyether pyrolysis property on combustion and heat release of boron-based fuel-rich propellant

机译：Effect of azide polyether pyrolysis property on combustion and heat release of boron-based fuel-rich propellant

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Overcoming the severe particle agglomeration of unreacted fuel boron (B) in combustion process to en-hance the heat release efficiency of B-based fuel-rich propellants is still a great challenge. Glycidyl azide polyether (GAP) was introduced to synthesize GAP-based energetic thermoplastic elastomer (GAP-ETPE) binder, which was used to fabricate the B/GAP-ETPE propellant. High GAP content (85 wt) can be used to synthesize 85GAP-ETPE as the binder. With the increase of GAP content, the decomposition conversion rate of GAP-ETPE was increased and the apparent activation energy (E-a) of B/GAP-ETPE propellant was decreased. The heat of explosion and combustion of B/85GAP-ETPE were increased from 4004.1 kJ/kg to 4546.2 kJ/kg and 24,056.5 kJ/kg to 24,938.3 kJ/kg, respectively. The combustion results showed that the burning rate of B/85GAP-ETPE (3.1 mm/s) was higher than that of B/TPE (1.8 mm/s) using a ther-moplastic elastomer (TPE) without GAP, and the particle injection effect was significantly improved. The pressurization rate of B/85GAP-ETPE (85 wt is maximal GAP content in binder in current study) was 2.6 MPa/s during combustion in a closed bomb, which was higher than that of other prepared B/GAP-ETPE, showing the propellant using GAP-ETPE with high GAP content exhibited better gas formation and higher heat release, which provided good dispersion and less particle agglomeration of B particles when burning. This strategy enables B to be ejected more effectively in the combustion process to achieve a better combustion performance and heat release. (C) 2022 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

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