Li/SF_(6)反应动力学参数及燃烧现象研究  

Study on Reaction Kinetics Paraneters and Combustion Phenomnena of Li/SF_(6)

作　　者：吴浩齐 骆政园[1] 白博峰[1] WU Haoqi;LUO Zhengyuan;BAI Bofeng(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《水下无人系统学报》2024年第3期558-564,共7页Journal of Unmanned Undersea Systems

基　　金：国家级基础加强项目资助(2020-JCJQ-ZD).

摘　　要：为探究不同温度及压力条件下锂/六氟化硫(Li/SF_(6))燃烧现象及反应动力学参数,利用激波诱导高压热载荷激励Li/SF_(6)燃烧实验台测量了温度范围为830~1400 K,压力范围为0.8~11 atm时的点火滞燃期;利用可视化实验段探究了Li/SF_(6)燃烧过程和基本发光现象等规律;利用点火滞燃期与温度和压力呈现出的典型Arrhenius依赖关系,通过多元线性回归法得出反应动力学参数。研究结果表明,Li/SF_(6)燃烧的点火滞燃期随温度和压力的升高而减少,发光现象随压力的升高由红色孤立火核逐渐转化为白色明亮火焰,并结合实验测定的点火滞燃期求出了指前因子A、指数因子n和活化能Ea,为明晰燃烧特性、构建数值仿真提供了重要依据。In order to investigate the combustion phenomenon and reaction kinetics parameters of Li/SF_(6) under different temperature and pressure conditions,the Li/SF_(6) combustion test platform with shock wave-induced high pressure thermal load excitation was used to measure the ignition delay period at the temperature of 830~1400 K and the pressure range of 0.8~11 atm.The laws of Li/SF_(6) combustion process and basic luminescence phenomena were investigated by the visual experiment section.Based on the typical Arrhenius dependence between ignition delay period and temperature and pressure,the reaction kinetics parameters were obtained by multiple linear regression method.The results show that the ignition delay period of Li/SF_(6) combustion decreases with the increase in temperature and pressure,and the luminescence phenomenon gradually changes from a red isolated fire nucleus to a white bright flame with the increase in pressure.The pre-index factor A,exponential factor N,and activation energy Ea are obtained based on the experimentally measured ignition delay period,which provides an important basis for the identification of combustion characteristics and the construction of numerical simulation.

关 键 词：Li/SF_(6) 点火滞燃期 反应动力学 激波 

分 类 号：TJ630.32[兵器科学与技术—武器系统与运用工程] U674[交通运输工程—船舶及航道工程]