有和无障碍物弯曲管内的爆轰行为

IF 1.7 4区 工程技术 Q3 MECHANICS
Y. Zeng, H.-H. Ma, F. Yuan, Y. Ge, L.-Q. Wang
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引用次数: 0

摘要

用化学计量量2H \(_{2}+\) O \(_{2}+\) 7Ar和CH \(_{4}+\) 2O \(_{2}\)填充的弯曲管内爆轰传播实验进行了研究。实验装置的测试段为半圆形通道,内半径为500mm。在压力传感器的监测下,根据波前到达时间计算爆轰速度。用烟熏箔片记录了爆炸细胞的演化过程。结果表明,在越过障碍物后,爆震波失效并迅速重新启动。然后它从一个过度驱动的爆炸衰减到一个稳态爆炸。爆轰发展过程分为五个阶段。深入分析了障碍物后边界的形成及超驱动爆轰的产生机理。障碍物后边界的形成与弯曲的激波锋和非均匀的细胞结构有关。不稳定混合物在弯管内的再起爆距离明显短于在直管内的再起爆距离。在没有障碍物的情况下,细胞宽度呈径向向外减小,并确定为线性关系。爆震波速度先减小后逐渐增大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Detonation behaviors in a curved tube with and without an obstacle

Detonation behaviors in a curved tube with and without an obstacle

Experiments were conducted to investigate detonation propagation in a curved tube filled with stoichiometric 2H\(_{2}+\)O\(_{2}+\)7Ar and CH\(_{4}+\)2O\(_{2}\). The test section of the experimental setup was a semicircular channel with an internal radius of 500 mm. Detonation velocities were calculated based on the arrival time of the wave front, monitored by pressure transducers. The detonation cellular evolution was recorded using smoked foils. The results revealed that after crossing the obstacle, the detonation wave failed and promptly re-initiated. It then decayed from an overdriven detonation to a steady-state detonation. The detonation development processes were divided into five regimes. The formation of the boundary behind the obstacle and the generation mechanism of the overdriven detonation were thoroughly analyzed. The formation of the boundary behind the obstacle is associated with the curved shock front and the non-uniform cellular structure. The re-initiation distance for an unstable mixture in a curved tube was significantly shorter than that in a straight channel. In the absence of the obstacle, the cell width decreased radially outward, a linear relationship was determined. The speed of the detonation wave initially decreased and then gradually increased.

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来源期刊
Shock Waves
Shock Waves 物理-力学
CiteScore
4.10
自引率
9.10%
发文量
41
审稿时长
17.4 months
期刊介绍: Shock Waves provides a forum for presenting and discussing new results in all fields where shock and detonation phenomena play a role. The journal addresses physicists, engineers and applied mathematicians working on theoretical, experimental or numerical issues, including diagnostics and flow visualization. The research fields considered include, but are not limited to, aero- and gas dynamics, acoustics, physical chemistry, condensed matter and plasmas, with applications encompassing materials sciences, space sciences, geosciences, life sciences and medicine. Of particular interest are contributions which provide insights into fundamental aspects of the techniques that are relevant to more than one specific research community. The journal publishes scholarly research papers, invited review articles and short notes, as well as comments on papers already published in this journal. Occasionally concise meeting reports of interest to the Shock Waves community are published.
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