| 气相爆震波衍射现象的数值研究 |
| |
| 引用本文： | 李海鹏,何立明,罗俊,曾昊,武卫.气相爆震波衍射现象的数值研究[J].航空动力学报,2010,25(3):496-502. |
| |
| 作者姓名： | 李海鹏 何立明 罗俊 曾昊 武卫 |
| |
| 作者单位： | 空军工程大学工程学院,西安,710038 |
| |
| 基金项目： | 空军工程大学校科研和教改项目 |
| |
| 摘 要： | 对不同条件下气相爆震波在突扩管道和带扩散段管道中的衍射过程进行了数值研究.结果表明:起爆管的直径和临界爆震管直径对爆震波能否成功衍射传入主爆管起到决定性的作用.壁面反射激波与爆震波相互作用在邻近壁面处产生高温、高压区域,有助于减少爆震的诱导时间以及横波间距.扩散段扩散角越小时,反射激波强度越大.高强度的反射激波会将爆震波分为3段,在分界点处产生高温、高压点,对爆震波的衍射传播起到支持作用.
|
| 关 键 词： | 气相爆震波 衍射 脉冲爆震发动机(PDE) 数值模拟 |
| 收稿时间： | 2/14/2009 7:55:44 PM |
| 修稿时间： | 7/17/2009 7:01:06 AM |
Numerical investigation on gaseous detonation diffraction |
| |
| LI Hai-peng,HE Li-ming,LUO Jun,ZENG Hao and WU Wei.Numerical investigation on gaseous detonation diffraction[J].Journal of Aerospace Power,2010,25(3):496-502. |
| |
| Authors: | LI Hai-peng HE Li-ming LUO Jun ZENG Hao and WU Wei |
| |
| Affiliation: | The Engineering Institute, Air Force Engineering University, Xi'an 710038, China;The Engineering Institute, Air Force Engineering University, Xi'an 710038, China;The Engineering Institute, Air Force Engineering University, Xi'an 710038, China;The Engineering Institute, Air Force Engineering University, Xi'an 710038, China;The Engineering Institute, Air Force Engineering University, Xi'an 710038, China |
| |
| Abstract: | Gaseous detonation diffraction in abruptly expanded tube and gradually expanded tubes is numerically investigated with different filling and different expanding angle. Detonation diameter and mixture critical diameter is vital to the successful diffraction. Detonation wave changes into hemispherical shape and expansion waves come into being and diffuse into the region behind the leading shock. Interaction of the wall reflected shock and the detonation wave produces a high temperature and high pressure region, which is helpful to reduce the detonation inducement time and the distance between transverse waves. The expanding angle affects the strength of the reflected shock with inverse relation. If the reflected shock is strong enough, it will separate the detonation wave into 3 parts generating high temperature high pressure regions at the cut-off points, which support detonation diffraction. |
| |
| Keywords: | gaseous detonation wave diffraction pulse detonation engine (PDE) numerical simulation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
|
