Optical Measurement of Fluid Motion in Semi-Valveless Pulse Detonation Combustor with High-Frequency Operation
Optical Measurement of Fluid Motion in Semi-Valveless Pulse Detonation Combustor with High-Frequency Operation
复制标题
高频操作半无阀脉冲爆震燃烧器中流体运动的光学测量
DOI：
10.1080/00102202.2018.1559837
复制
发表时间：
2018
影响因子：
1.9
通讯作者：
and T. Endo
中科院分区：
文献类型：
--
作者：
A. Kubota;K. Matsuoka;A. Kawasaki;J. Kasahara;H. Watanabe;A. Matsuo;and T. Endo
半无阀脉冲爆震循环（PDC）的吹扫层需要最小化，以在气体动力学频率上限下操作。因此，有必要更好地了解燃烧气体回流的过程，以最大限度地减少吹扫层厚度。对半无阀PDC内的流场进行了可视化，以显示燃气的运动情况。燃烧室的长度为95毫米，10毫米平方的横截面被使用。超临界乙烯和氧气分别用作燃料和氧化剂，操作频率为604 Hz。采用等熵流模型模拟了可爆混合物的非定常充注过程。此外，详细的燃烧气体排放过程与燃烧转爆轰（DDT）和回流被捕获。结果表明，DDT过程产生的回波是燃气回流的主要触发因素。当DDT过程所需的持续时间比燃烧气体排放过程的持续时间足够短时，发现后者可以通过没有DDT过程的一维数值分析以约90%的精度再现。
The purge layer of a semi-valveless pulse detonation cycle (PDC) needs to be minimized for operating at a gas-dynamic upper frequency limit. Therefore, it is essential to better understand the process of burned gas backflow for minimizing the purge layer thickness. The flow field of the semi-valveless PDC was visualized to illustrate the movement of burned gas. A combustor of length of 95 mm with a 10-mm-square cross section was used. Supercritical ethylene and oxygen gas were used as fuel and oxidizer, respectively, and the operation frequency was 604 Hz. The unsteady refilling process of the detonable mixture was modeled by an isentropic flow. In addition, the detailed burned gas blowdown process with deflagration-to-detonation transition (DDT) and the backflow were captured. It was shown that the retonation wave generated by the DDT process was the primary trigger of the burned gas backflow. When the duration required for the DDT process was sufficiently shorter than that of the burned gas blowdown process, it was found the latter could be reproduced with approximately 90% accuracy by one-dimensional numerical analysis without the DDT process.
影响因子：
1.9
作者：
K. Matsuoka;Jun Yageta;T. Nakamichi;J. Kasahara;T. Yajima;T. Kojima
通讯作者：
K. Matsuoka;Jun Yageta;T. Nakamichi;J. Kasahara;T. Yajima;T. Kojima
千赫兹频率的脉冲爆震操作
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
H. Taki;N. Hirota;K. Matsuoka;A. Kawasaki;J. Kasahara;H. Watanabe;A. Matsuo;and T. Endo
通讯作者：
and T. Endo