Abstract Recent experiments have revealed the propagation of a sustained single-head detonation propagation through an obstructed channel. In this study, new experiments and analysis of the complex three-dimensional behaviour of such a single-headed wave in stoichiometric hydrogen-oxygen mixtures is presented. An optically accessible channel of square cross-section containing obstacles with 50% area blockage was used in conjunction with soot-foils and dual-axis high-speed schlieren imaging to study the phenomenon over an initial pressure range of 17 kPa to 24 kPa. Detailed analysis of the wave reveals a transverse asymmetry generated by detonation diffraction whereby a transverse detonation propagates in a zig-zag fashion down the channel reflecting off opposite channel sidewalls. Analysis of the single triple-point trajectory reveals a detonation propagation velocity between 1.4 and 0.5VCJ, with the transverse detonation propagating at a constant 0.9VCJ until reflection on the channel sidewall. The trajectory of the triple-point is undisturbed by the presence of obstacles. In the vicinity of the triple-point, flow analysis indicates prompt ignition (

中文翻译：

---

部分阻塞通道中的单头爆轰传播

摘要 最近的实验揭示了持续的单头爆轰传播通过受阻通道的传播。在这项研究中，介绍了在化学计量的氢氧混合物中这种单头波的复杂三维行为的新实验和分析。包含具有 50% 面积阻塞障碍物的方形横截面的光学可访问通道与烟灰箔和双轴高速纹影成像结合使用，以研究 17 kPa 至 24 kPa 初始压力范围内的现象。对波的详细分析揭示了由爆震衍射产生的横向不对称性，由此横向爆震以锯齿形沿着通道向下传播，并从相对的通道侧壁反射。对单个三点轨迹的分析表明，爆轰传播速度在 1.4 到 0.5VCJ 之间，横向爆震以恒定的 0.9VCJ 传播，直到在通道侧壁上反射。三点的轨迹不受障碍物的干扰。在三相点附近，流动分析表明迅速点火（