微装药腔体热隔离规律分析与优化

刘　卫，薛　艳，解瑞珍，刘　兰，任小明

（陕西应用物理化学研究所应用物理化学国家级重点实验室，陕西　西安　710061）

摘　要：针对解决微推进器阵列装药腔体单元之间的串火问题，从材料和结构入手，开展微装药腔体热隔离规律研究，设计了矩形和环形两种热隔离腔结构。结果表明，采用玻璃装药腔体具有较好的热隔离效果。相邻装药腔体单元的最高温度随矩形隔离腔长度增加呈指数形式减小，随矩形隔离腔长度增加呈线性减小，随环形隔离腔延伸角度增加呈指数形式增加，随环形隔离腔外径增加呈指数形式减小，为固体化学微推进系统的结构优化设计提供了技术支撑。

关键词：兵器科学与技术；固体化学微推进阵列；热隔离；装药腔体；温度分布

中图分类号：TJ450.2　文献标志码：A

作者简介：刘卫（1986—），男，博士，目前主要从事MEMS 火工品技术及火工品力学抗过载技术研究，E-mail：peony1303＠126.com。(www.xing528.com)

Research on thermal isolation capability of micro-explosive chamber

LIU Wei，XUE Yan，XIE Ruizhen，LIU Lan，REN Xiaoming

（National Key Laboratory of Applied Physics and Chemistry，Shannxi Applied Physics and Chemistry Research Institute，Xi'an 710061，China）

Abstract：Accidental fire phenomenon，that the ignition of one micro-explosive chamber element leads to that the adjacent ones are ignited，is a big problem for MEMS-based solid propellant micro-thruster arrays.In order to solve this problem，thermal isolation capabilities of micro-explosive chamber are modeled and simula⁃ted，and both the rectangle and annular isolation chambers were designed for comparision.The simulation results show that the glass-based micro-explosive chamber isolates heat better than the Si-based chamber.The maxi⁃mum temperatures of the chamber adjacent to the central chamber decrease exponentially with the length increas⁃ing of rectangle isolation chamber，decrease linearly with the width increasing of rectangle isolation chamber，in⁃crease exponentially with the angle increasing of annular isolation chamber，and decrease exponentially with the radius increasing of annular isolation chamber，which are valuable for the design of MEMS-based solid propellant micro-thruster arrays.

Keywords：ordnance science and technology；MEMS-based solid propellant micro-thruster arrays；ther⁃mal isolation；chamber；temperature distributions