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| 多管脉冲爆震发动机流场数值研究 |
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刘建文1,2,3,4,5, 钟诚文1,2,3, 赵书苗1,2,3,4,5
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1.西北工业大学翼型叶栅空气动力学国家重点实验室 陕西西安710072;2.西北工业大学高性能计算研究与发展中心;3.陕西西安710072;4.北京动力机械研究所;5.北京100074
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| 摘要: |
| 针对二维带有收敛扩张喷管的双管脉冲爆震发动机(PDE),采用并行的时空守恒元和解元(CE/SE)方法对单管点火、双管同时点火和不同喉道面积情况下的爆震流场进行了数值模拟。化学反应模型采用H2和O2的8组分34基元反应。计算发现,单管点火情况下传入旁通爆震管的流场可以引爆其中的可燃气体;多管PDE内流场之间的相互作用使管内的压强处于比较高的状态;增大喉道面积削弱了多管PDE流场之间的相互影响,同时减小了封闭端面的压力,从而导致发动机性能下降。 |
| 关键词: 爆震 时空守恒元和解元方法+ 基元化学反应+ 并行计算 数值仿真 |
| DOI： |
| 分类号:V231 |
| 基金项目:国防科技重点实验室基金(9140C4201020602) |
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| Numerical investigation of multi-tube pulse detonation engine |
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LIU Jian-wen,ZHONG Cheng-wen,ZHAO Shu-miao
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1.National Defence Key Lab.of Airfoil and Cascade Aero-dynamic,Northwestern Polytechnical Univ.,Xi’an 710072,China;2.Center for High Performance Computing,Northwestern Polytechnical Univ.,Xi’an 710072,China;3.Beijing Power Machinery Research Inst.,Beijing 100074,China
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| Abstract: |
| The parallel space-time conservation element and solution element(CE/SE) method was used to simulate the flow fields of dual-tube Pulse Detonation Engine(PDE)with convergent-divergent nozzle.The detailed flow structures were obtained under single-tube-ignition,dual-tube-ignition and different throat area conditions.The 8-species,34 elementary reactions model for hydrogen-oxygen was used.It demonstrates that the flow fields generated by single-tube-ignition can ignite the gas of side detonation tubes;interactions of the internal flow fields of multi-tube PDE keep the pressure at a higher level;increasing throat area weakens the interaction of internal flow fields,and reduces the pressure on thrust wall simultaneously,thus decreasing the engine performance. |
| Key words: Detonation CE/SE+ Elementary reaction+ Parallel computation Numerical simulation |
