| 摘要: |
| 使用两步化学反应模型对连续旋转爆轰发动机(Continuous rotating detonation engine,CRDE)进行了二维数值模拟研究。数值计算获得了同轴圆管腔中间层曲面上连续爆轰的多个循环过程。分析了燃料入射、提前燃烧、爆轰波结构和波传播速度等几个关键问题。计算获得燃烧室内流场结构与之前实验研究结果定性符合。计算中燃料以最大1400m/s沿轴向入射,爆轰波可约以2400m/s沿周向连续循环传播。计算的燃烧室内爆轰波循环频率约为2300Hz。 |
| 关键词: 发动机 爆轰 爆轰波 燃烧 数值仿真 |
| DOI： |
| 分类号:V231.22 |
| 基金项目:国家自然科学基金(90305013) |
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| Numerical simulation of continuous rotating detonation engine in column coordinate |
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SHAO Ye-tao, LIU Meng, WANG Jian-ping
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State Key Lab. of Turbulence and Complex Systems/Dept. of Mechanics and Aerospace Engineering, Peking Univ., Beijing 100871, China
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| Abstract: |
| A two-dimensional numerical simulation of the continuous rotating detonation engine (CRDE) was carried out with two-step chimerical kinetic model. Multi-cycle process of continuous rotating detonation(CRDE) was numerically obtained on coaxial cylinder. Some key problems about CRDE, such as fuel injection, pre-combustion, detonation structure and propagating velocity were discussed. The simulation results agree well with the previous experiment results. A detonation wave can continuously propagate around at about 2400 m/s with maximum injection velocity of 1400 m/s. A CRDE keeps a high frequency of about 2300 Hz in this simulated combustor of 7 mm in radius. |
| Key words: Engine Detonation Detonation wave Combustion Numerical simulation |
