Investigation of reflective shuttling detonation cycle by schlieren and chemiluminescence photography
Investigation of reflective shuttling detonation cycle by schlieren and chemiluminescence photography
复制标题
通过纹影和化学发光摄影研究反射穿梭爆炸循环
DOI：
10.1016/j.combustflame.2021.111826
复制
发表时间：
2022
影响因子：
4.4
通讯作者：
Matsuo Akiko
中科院分区：
文献类型：
--
作者：
Taguchi Tomoya;Yamaguchi Masato;Matsuoka Ken;Kawasaki Akira;Watanabe Hiroaki;Itouyama Noboru;Kasahara Jiro;Matsuo Akiko
反射式穿梭滞留燃烧室（RSDC）是一种具有两个反射壁的二维燃烧室。与旋转爆震燃烧室（RDC）不同，RSDC可以通过光学技术可视化燃烧室的整个区域。此外，RSDC可以再现RDC中的反向旋转爆轰模式。本研究通过CH ~* 发光和纹影图像研究了RSDC的动力学过程。反射壁距离设置为45 mm（L型）和25 mm（S型）。结果，S型单波模式的波速为1226±64 m/s，是L型的76%。结果发现，爆轰传播速度随着反射壁距离的减小而减小。将荧光图像叠加在纹影图像上，发现混合物主要是通过激波后的爆燃燃烧。此外，实验得到的混合物填充高度与爆轰使混合物填充过程暂时停止并以恒定速度重新填充的模型吻合较好。利用该模型得到的最大填充高度，发现爆轰模式处于无量纲量（反射壁距离除以波数和混合物填充高度的最大值）的3± 0. 6范围内。
A reflective shuttling detention combustor (RSDC) is a two-dimensional combustor with two reflection walls. Unlike a rotating detonation combustor (RDC), an RSDC can visualize the entire area of the combustor via an optical technique. In addition, the RSDC can reproduce the counter-rotating detonation mode in RDC. In present study, CH* luminescence and schlieren image were observed to investigate the dynamics of the RSDC. The reflective wall distance was set to 45 mm (Type L) and 25 mm (Type S). As the results, the wave speed of 1226±64 m/s in the single wave mode in Type S was 76% of that in Type L. It was found that the detonation propagation speed decreased with a reduction in the reflection wall distance. Superimposing the luminescence images on the schlieren images revealed that the mixture was mainly burned by deflagration behind shock wave. In addition, the experimental mixture fill height was in good agreement with model in which the mixture filling process was temporarily stopped by detonation and refilled at a constant speed. Using the maximum fill height obtained by the model, it was found that the detonation mode was in the region of 3±0.6 of the dimensionless quantity (the reflection wall distance divided by the wave number and maximum value of the mixture fill height).