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首页> 外文期刊>Combustion and Flame >Wavelet pattern and self-sustained mechanism of gaseous detonation rotating in a coaxial cylinder
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Wavelet pattern and self-sustained mechanism of gaseous detonation rotating in a coaxial cylinder

机译：同轴圆筒内气体爆轰的小波图和自持机理

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摘要

Gaseous detonation propagating in a coaxial cylinder was studied for hydrogen/oxygenitrogen mixtures numerically and experimentally. The numerical method used was based on the three-dimensional Euler equations with detailed finite-rate chemistry. Smoked foil measurement was performed to record the cellular structure of the detonation propagation. The results show that the calculated streak picture is in qualitative agreement with the picture recorded by a high speed streak camera from published literature. The three-dimensional flow field induced by the continuously rotating detonation is visualized and the distinctive features of the rotating detonations are clearly depicted. Due to the curvature of the annular tube, the size of cellular pattern along the concave wall is smaller than that along the convex wall. This implies that the detonation wave near the concave wall is convergent and therefore is stronger than that near the divergent convex wall. Also, the numerical simulations show three-dimensional rotating detonation structures, where display the special combined detonation.
机译：数值和实验研究了在同轴圆柱体内传播的气体爆轰中氢/氧/氮混合物。所使用的数值方法是基于带有详细有限速率化学的三维欧拉方程。进行烟熏箔测量以记录爆炸传播的孔结构。结果表明，计算出的条纹图像与高速条纹相机从公开文献中记录的图像在质量上吻合。可视化了连续旋转爆轰引起的三维流场，清楚地描绘了旋转爆轰的独特特征。由于环形管的弯曲，沿凹壁的蜂窝状图案的尺寸小于沿凸壁的蜂窝状图案的尺寸。这意味着在凹壁附近的爆炸波是会聚的，因此比在发散凸壁附近的爆炸波更强。此外，数值模拟显示了三维旋转爆轰结构，其中显示了特殊的组合爆轰。

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  • 来源
    《Combustion and Flame》 |2011年第11期|p.2220-2228|共9页
  • 作者

    Zhenhua Pan; Baochun Fan; Xudong Zhang; Mingyue Gui; Gang Dong;

  • 作者单位

    State Key Laboratory of Science and Technology on Ballistics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China;

    State Key Laboratory of Science and Technology on Ballistics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China;

    State Key Laboratory of Science and Technology on Ballistics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China;

    State Key Laboratory of Science and Technology on Ballistics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China;

    State Key Laboratory of Science and Technology on Ballistics, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China,State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    rotating detonation; three-dimensional structure; cellular detonation; numerical simulation; experimental measurements;

    机译：旋转爆轰三维结构;细胞爆炸数值模拟实验测量;

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