Numerical analysis of fast cook-off and case failure characteristics of solid rocket motor with AP/HTPE star-charged

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2025-04-18 DOI:10.1016/j.icheatmasstransfer.2025.108975

Kaile He, Yonggang Yu

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引用次数: 0

Abstract

To investigate the cook-off response and heat transfer in AP (ammonium perchlorate)/HTPE (hydroxyl-terminated polyether) solid rocket motor (SRM) under fast cook-off conditions (FCC), a three-dimensional numerical model based on the BDP (Becksted-Derr-Price), chemical-thermal decomposition scheme was developed. This model incorporates propellant ignition and combustion reactions. The study conducted numerical simulations under FCC with heating rates of 1.6 K/s to 2.4 K/s. the grid-node separation method was used to effectively characterize the motor casing's dynamic response during large deformations. Results show that ignition occurs in the propellant's bottom annular region, with multiple hot spots forming simultaneously. The ignition delay time is linearly related to the heating rate, and varying heating rates did not significantly affect ignition temperature. Post-ignition, combustion pressure caused limited casing damage, with no detonation. The motor case remained largely intact, though severe deformation and fragmentation occurred near the ignition site, accompanied by longitudinal cracks.

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AP/HTPE星形充电固体火箭发动机快速熄火及壳体失效特性数值分析

为了研究AP（高氯酸铵）/HTPE（端羟基聚醚）固体火箭发动机（SRM）在快速烧断条件下的烧断响应和传热特性，建立了基于BDP （Becksted-Derr-Price）化学-热分解方案的三维数值模型。该模型包含推进剂点火和燃烧反应。在升温速率为1.6 ~ 2.4 K/s的FCC条件下进行了数值模拟。采用网格节点分离方法，有效表征了电机机壳大变形时的动态响应。结果表明：点火发生在推进剂底部环形区域，同时形成多个热点；点火延迟时间与升温速率呈线性相关，升温速率变化对点火温度影响不显著。点火后，燃烧压力对机匣的破坏有限，没有爆炸。发动机外壳基本完好无损，但在点火点附近发生了严重的变形和碎裂，并伴有纵向裂缝。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.