| 多障碍物通道中激波诱导气相爆轰的数值研究 |
| |
| 引用本文： | 王春,张德良,姜宗林.多障碍物通道中激波诱导气相爆轰的数值研究[J].力学学报,2006,38(5):586-592. |
| |
| 作者姓名： | 王春 张德良 姜宗林 |
| |
| 作者单位： | 中国科学院力学研究所高温气动重点实验室 |
| |
| 基金项目： | 国家自然科学基金（90205027）及中国博士后基金（2005037444）资助项目. |
| |
| 摘 要： | 应用数值模拟方法，研究了直通道中激波经过多块矩形障碍物时诱导
H2/O2混合气体起爆的物理机制. 研究表明：在前导激波强度不足以诱导波后气
体直接起爆的条件下，经过激波压缩的可燃气体也可能在远离激波的障碍物之间的凹槽部位
起爆；障碍物表面产生的压缩波、膨胀波和气流滑移面对可燃气体的起爆、爆轰波的形成和
传播过程有重要的影响；添加不同稀释比的氮气可以影响爆轰波后流场的温度分布；增加障
碍物的间距可以改变可燃气起爆位置.
|
| 关 键 词： | 爆轰起爆，多块障碍物 壁面凹槽，数值模拟 |
| 文章编号： | 0459-1879（2006）05-0586-07 |
| 收稿时间： | 2005-02-04 |
| 修稿时间： | 2006-03-07 |
Numerical Investigation on Shock-Induced Gaseous Detonation in a Straight Duct with Multi-Obstacles |
| |
| Wang Chun,Zhang Deliang,Jiang Zonglin.Numerical Investigation on Shock-Induced Gaseous Detonation in a Straight Duct with Multi-Obstacles[J].chinese journal of theoretical and applied mechanics,2006,38(5):586-592. |
| |
| Authors: | Wang Chun Zhang Deliang Jiang Zonglin |
| |
| Affiliation: | Wang Chun, Zhang Deliang ,Jiang Zonglin , Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China) |
| |
| Abstract: | Numerical simulation was carried out to investigate the shock-induced detonation initiation of the premixed H2/O2/N2 gas mixture in a duct with multi-rectangular-shaped obstacles. Numerical results show that even if the incident shock is not strong enough to induce a direct initiation of combustible mixtures behind the shock, the onset of detonation may take place in the cavity between obstacles which are far behind the shock front. Compression waves, expansion waves and contact surfaces generated from the obstacles surface play important roles on the chemical reaction that triggers the DDT process. Increasing N2 dilution of combustible mixtures, the wall temperature distribution behind detonations becomes non-uniform and increasing the distance between obstacles results in a delay of detonation initiation. |
| |
| Keywords: | detonation initiation multi-obstacles cavities numerical simulation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《力学学报》浏览原始摘要信息 |
|
点击此处可从《力学学报》下载全文 |
