归明月, 张镭潆, 崔皓, 张辉. 与爆轰相关的湍流燃烧[J]. 空气动力学学报, 2020, 38(3): 515-531. DOI: 10.7638/kqdlxxb-2020.0066
引用本文: 归明月, 张镭潆, 崔皓, 张辉. 与爆轰相关的湍流燃烧[J]. 空气动力学学报, 2020, 38(3): 515-531. DOI: 10.7638/kqdlxxb-2020.0066
GUI Mingyue, ZHANG Leiying, CUI Hao, ZHANG Hui. Turbulent combustion related with detoantion[J]. ACTA AERODYNAMICA SINICA, 2020, 38(3): 515-531. DOI: 10.7638/kqdlxxb-2020.0066
Citation: GUI Mingyue, ZHANG Leiying, CUI Hao, ZHANG Hui. Turbulent combustion related with detoantion[J]. ACTA AERODYNAMICA SINICA, 2020, 38(3): 515-531. DOI: 10.7638/kqdlxxb-2020.0066

与爆轰相关的湍流燃烧

Turbulent combustion related with detoantion

  • 摘要: 爆轰具有较高的燃烧效率,当应用于推进系统时,有较宽广的前景,故引起国内外学者广泛的关注。与爆轰有关的两个重要现象是——爆轰的生成和传播。爆轰的生成分为直接起爆和间接起爆。直接起爆需要极高的能量,因此间接起爆一直是研究的热点,其中爆燃转爆轰(deflagration-to-detonation transition,DDT)则是关注的重点。然而,经过几十年的实验、理论和数值研究,DDT的机理已被理解,但是准确的预测还无法实现,这其中最核心的因素是湍流燃烧。对于爆轰波的传播,特别是高活化能的可燃气体,其波阵面呈强不稳定结构,存在湍流燃烧,波后出现的未燃气团的燃烧也属于湍流燃烧,这使得爆轰波的精确控制也存在较大的困难,但是爆轰波传播的平均速度仍然可以用CJ速度来预测。本文对DDT和爆轰波结构中的湍流燃烧的研究现状进行了分析和评述,并对未来的研究进行了展望。

     

    Abstract: Due to high energy release rate, the applications of detonation in propulsion syste ms have aroused strong interest. There are two important phenomena related with detonation:detonation initiation and propagation. Categorically, a detonation wave can be initiated either directly, through a rapid deposition of energy, or indirectly. In direct detonation initiation, there are higher energy. Indirect detonation initiation is always research hotspots, in which deflagration-to-detonation transition (DDT) is the focus. After decades of experimental, theoretical and numerical research, the DDT mechanis ms have been understood. However, it is unable to achieve accurate prediction, in which the main challenge is turbulent combustion. According to detonation propagation, especially for the combustible mixture with high activation energy, there are the turbulent nature of the reaction zone in detonation wave structure and the presence of unburnt gas pockets that are convected downstream into the wake of the detonation front. This behavior makes the accurate control of detonation wave difficult. But, the average velocity of detonation can be predicted by the CJ theory velocity. In this paper, the recent developments in the DDT and detonation wave structure are reviewed, and the future research is prospected.

     

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