HAN基电控固体推进剂电化学性能对燃烧性能的影响  

Effect of electrochemical properties of HAN-based electronically controlled solid propellants on its combustion performance

作　　者：郭昊琪 杨玉林 GUO Haoqi;YANG Yulin(School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学化工与化学学院,哈尔滨150001

出　　处：《固体火箭技术》2024年第3期341-347,共7页Journal of Solid Rocket Technology

基　　金：国家自然科学基金项目(22072034)。

摘　　要：硝酸羟胺(HAN)基电控固体推进剂是一种以HAN为主要氧化剂的新型智能推进剂,通过外加电源控制其燃烧速率与启停。为探索电化学性能与燃烧性能间的关系,在研究推进剂的离子迁移率、过电位的变化规律的基础上,将其与推进剂的点火电压、点火延迟进行关联。研究发现,推进剂在外加低电压(1.6~2.8 V)刺激下,离子迁移率与电压大小正相关,推进剂基体的改良在提高离子迁移率方面的效果大于离子掺杂。在燃烧性能方面,离子迁移率影响点火电压,过电位决定点火延迟;离子迁移率越高,点火时,推进剂的电流密度与反应活性越高;当迁移率由0.09 mm^(2)·s^(-1)·V^(-1)升高至0.16 mm^(2)·s^(-1)·V^(-1)时,点火电压由210 V降至70 V,有利于拓宽电控固体推进剂的应用范围;点火电压一定时,推进剂过电位越小,电分解速率越大,点火延迟越小,当过电位由0.67 V降至0.51 V时,点火延迟由1.68 s降至0.31 s,有利于推进剂满足快速响应的战略需求。HAN(hydroxylamine nitrate)-based electronically controlled solid propellant is a new intelligent propellant mainly with HAN as oxidant,and the combustion rate and start-stop could be controlled through external power supply.To explore the relationship between electrochemical performance and combustion performance of electronically controlled solid propellant,the ion mobility and overpotential changes of propellant will be studied and correlated with the ignition voltage and ignition delay of the propellant.The ion mobility of propellant is positively correlated with voltage under the stimulation of the external low voltage(from 1.6 V to 2.8 V),and the effect of improvement of propellant matrix in increasing the ion mobility is greater than that of ion doping.In terms of combustion performance,ion mobility affects the ignition voltage,and the overpotential determines the ignition delay.The enhanced ion mobility will increase the current density and reactivity of the propellant.When increasing the mobility from 0.09 mm^(2)·s^(-1)·V^(-1) to 0.16 mm^(2)·s^(-1)·V^(-1),the ignition voltage is reduced from 210 V to 70 V,which is conducive to broadening the application range of electronically controlled solid propellants.When the ignition voltage is fixed,the smaller propellant overpotential is the greater the decomposition rate is,and the smaller the ignition delay is.When the overpotential is reduced from 0.67 V to 0.51 V,the ignition delay is reduced from 1.68 s to 0.31 s,which is conducive to the strategic needs of the propellant to achieve rapid response.

关 键 词：电控固体推进剂 硝酸羟胺 离子迁移率 过电位 电控燃烧 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]