| 激波聚焦诱导气液两相爆震燃烧的数值模拟 |
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| 引用本文： | 杨青,李志强,邸亚超,许欢. 激波聚焦诱导气液两相爆震燃烧的数值模拟[J]. 航空动力学报, 2014, 29(8): 1802-1809 |
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| 作者姓名： | 杨青 李志强 邸亚超 许欢 |
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| 作者单位： | 北京航空航天大学 能源与动力工程学院 航空发动机气动热力国家级重点实验室, 北京 100191;北京航空航天大学 能源与动力工程学院 航空发动机气动热力国家级重点实验室, 北京 100191;北京航空航天大学 能源与动力工程学院 航空发动机气动热力国家级重点实验室, 北京 100191;北京航空航天大学 能源与动力工程学院 航空发动机气动热力国家级重点实验室, 北京 100191 |
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| 摘 要： | 对以激波聚焦和增加障碍物方式诱导煤油-空气气液两相爆震燃烧的过程进行了数值模拟.采用欧拉-拉格朗日方法建立了脉冲爆震发动机(PDE)中气液两相流的喷射、雾化、掺混过程.研究发现环形爆震波在爆震管凹腔内经过反射、汇聚后能够引燃可燃混合物.而在障碍物处,激波的反射和再反射聚焦能够形成高温高压点(2700K,25MPa),产生局部爆炸,有助于形成稳定的脉冲爆震燃烧(波面速度为1900m/s,温度为2 950K),有效地缩短由缓燃向爆震转变(DDT)距离至0.45m.
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| 关 键 词： | 激波聚焦 爆震燃烧 气液两相 脉冲爆震发动机 由缓燃向爆震转变 |
| 收稿时间： | 2013-05-15 |
Numerical simulation on gas-liquid two-phase detonation combustion induced by shock wave focusing |
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| YANG Qing,LI Zhi-qiang,DI Ya-chao and XU Huan. Numerical simulation on gas-liquid two-phase detonation combustion induced by shock wave focusing[J]. Journal of Aerospace Power, 2014, 29(8): 1802-1809 |
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| Authors: | YANG Qing LI Zhi-qiang DI Ya-chao XU Huan |
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| Affiliation: | National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | Numerical simulation on gas-liquid two-phase detonation combustion of kerosene-air was conducted induced by shock wave focusing and setting obstacles. The numerical model of gas-liquid two-phase flow was established for the fuel injection, atomization and mixing of pulse detonation engine (PDE) by an Eulerian-Lagrangian formulation. Computational results show that the reflection and focusing of the ring shock wave can ignite the combustible mixture inside the capacity of detonation tube. Re-reflection and focusing of the reflecting shock wave could form higher temperature and pressure points (2700K, 25MPa) near the obstacles, which can lead to local explosion, further generate stable pulse detonation combustion (velocity of 1900m/s, temperature of 2950K) and shorten the length of deflagration to detonation transition (DDT) to 0.45m effectively. |
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| Keywords: | shock wave focusing detonation combustion gas-liquid two-phase pulse detonation engine deflagration to detonation transition |
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