Numerical investigation of flow particle paths and thermodynamic performance of continuously rotating detonation engines
Numerical investigation of flow particle paths and thermodynamic performance of continuously rotating detonation engines
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DOI：
10.1016/j.combustflame.2012.07.007
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发表时间：
2012-12
影响因子：
4.4
通讯作者：
R. Zhou;Jian-ping Wang
中科院分区：
文献类型：
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作者：
R. Zhou;Jian-ping Wang
在环形室连续旋转爆轰二维数值模拟的基础上，对三种不同燃烧过程下流动颗粒的燃烧路径进行了详细的跟踪分析。爆震波、爆燃波、斜激波和接触面对流动颗粒的路径影响较小。路径在方位角方向的波动小于燃烧室周长的12%。流动粒子遇到爆震波或斜激波时，路径会发生偏转，遇到爆燃波或接触面时，路径不会发生偏转。约23.6%的燃料通过爆燃燃烧，左侧通过旋转爆震波燃烧。然后讨论了连续旋转爆轰的热力学性能。数值模拟得到的p-v图和T-s图与理想ZND模型在质量上是一致的。二维RDE爆轰燃烧的平均热效率为31%，平均净机械功为1.3MJ/kg。整个RDE的热效率为26.4%，其净机械功为理想ZND模型的30%。确定了连续旋转爆轰的优越性能。
Based on the two-dimensional numerical simulation of continuously rotating detonations in an annular chamber, the paths of flow particles burned by three different processes are tracked and analyzed in detail. The detonation wave, the deflagration wave, the oblique shock wave, and the contact surface have a small influence on the paths of flow particles. The fluctuation of paths in the azimuthal direction is less than 12% of the circumference of the combustion chamber. The path will deflect when the flow particle encounters the detonation wave or the oblique shock wave, and it will not deflect when encounters the deflagration wave or the contact surface. About 23.6% fuel is burned by deflagration, and the left is burned by rotating detonation wave. The thermodynamic performance of continuously rotating detonations is then discussed. The p–v and T–s diagrams obtained by numerical simulation are qualitatively consistent with the ideal ZND model. The average thermal efficiency of the detonation combustion in 2D RDE is 31%, and its average net mechanical work is 1.3MJ/kg. The thermal efficiency of the entire RDE is 26.4%, and its net mechanical work is 30% of the ideal ZND model. The superior performance of continuously rotating detonations is determined.