摘要
为填补国内在离子液体与绿色氧化剂自燃领域研究的空白,本文开展了咪唑硫氰酸类离子液体在质量分数为90%的过氧化氢中的自燃特性研究,并分析了液滴碰撞速度和添加剂对咪唑硫氰酸类离子液体在过氧化氢中点火延迟时间的影响。结果显示:离子液体在过氧化氢中的自燃过程分为3个阶段:液滴与过氧化氢接触、混合,出现液坑;产生中央射流,射流顶端分离出液滴;温度升高,黑色烟雾与火核出现。离子液体点火延迟时间与碰撞速度呈负相关,由于黏度和燃烧极限等因素的影响,1-乙基-3-甲基咪唑硫氰酸([EMIM][SCN])的点火延迟时间减小程度随碰撞速度的增大而减弱,而1-丁基-3-甲基咪唑硫氰酸([BMIM][SCN])则相反。相同碰撞速度下,[BMIM][SCN]的点火延迟时间小于[EMIM][SCN],表明[BMIM][SCN]与质量分数为90%的过氧化氢自燃效果好。掺混燃料的点火延迟时间随添加剂的摩尔比增加呈增大的趋势,且均大于离子液体的点火延迟时间,当[EMIM][SCN]掺混乙二醇的摩尔比为0.8、[BMIM][SCN]掺混乙二醇的摩尔比为0.9、[EMIM][SCN]和[BMIM][SCN]掺混丙二醇的摩尔比为0.7时,在不同的碰撞速度下均很难自燃,表明掺混乙二醇和丙二醇不能提高咪唑硫氰酸类离子液体在质量分数为90%的过氧化氢中的燃烧性能。
To fill the gaps in domestic research on the hypergolicity of ionic liquids and green oxidants,this paper studies hypergolic characteristics of imidazole thiocyanate ionic liquids in 90%hydrogen peroxide and analyzes the impact of droplet collision speed and different additives on the ignition delay time(IDT)of such liquids in hydrogen peroxide.The results show that the hypergolic process of such liquid in hydrogen peroxide is divided into three stages:liquid pits appear when droplet contacts and mixes with hydrogen peroxide;the central jet appears and the droplet separates from the top of the jet;the temperature rises,black smoke and fire cores appear.The IDT of the ionic liquid has a negative correlation with the collision speed.Due to the influence of factors such as viscosity and combustion limit,the reduction of IDT of 1-ethyl-3-methylimidazole thiocyanate([EMIM][SCN])decreases with the increase of collision speed,while 1-Butyl-3-methylimidazole thiocyanate([BMIM][SCN])is the opposite.At the same collision speed,the IDT of[BMIM][SCN]is shorter than[EMIM][SCN],indicating that[BMIM][SCN]has a good hypergolic ignition effect with 90%hydrogen peroxide.The IDT of the blended fuel increases with the increase of the molar ratio of the additives and is greater than the IDT of the ionic liquid.When[EMIM][SCN]was blended with ethylene glycol with a molar ratio of 0.8,[BMIM][SCN]was blended with ethylene glycol with a molar ratio of 0.9,and[EMIM][SCN]and[BMIM][SCN]blended with propylene glycol with a molar ratio of 0.7,it is difficult for hypergolic ignition at different collision speeds This indicates combustion performance of imidazole thiocyanate ionic liquid in 90%hydrogen peroxide cannot be improved by blending ethylene glycol or propylene glycol.
作者
李钰潼
庞应冉
高忠权
谭紫阳
陈鹏飞
谭永华
洪流
LI Yutong;PANG Yingran;GAO Zhongquan;TAN Ziyang;CHEN Pengfei;TAN Yonghua;HONG Liu(School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;Key Laboratory of Liquid Rocket Engine Technology, Xi’an aerospace Propulsion Institute, Xi’an 710100, China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2022年第5期12-20,共9页
Journal of Xi'an Jiaotong University
基金
液体火箭发动机技术重点实验室资助项目
中央高校基本科研业务专项资金资助项目(xzd012021052)
陕西省自然科学基金重点资助项目(2021JZ-03)。
关键词
离子液体
过氧化氢
自燃
点火延迟时间
ionic liquid
hydrogen peroxide
hypergolic ignition
ignition delay time
