A detonation in multiphase air-kerosene-boron mixtures is studied experimentally and the initiation and propagation characteristics of multiphase pulse detonation are emphasized. The boron-rich kerosene gelled propellants are taken as the fuel to analyze its detonation characteristics in static premixed combustible gases. The factors affecting detonation initiation including component, atomization, and ignition method of propellant are elucidated respectively. Considering atomization, evaporation and combustion, a small molecular organic compound is employed to fabricate metallized gelled propellants enriched with substantial boron particles. The dynamic atomization of gelled propellant with varying boron content is imaged by means of visual observation devices, and the ejecting parameters are optimized properly from actual initiation conditions. A flame jet by hot turbulent jet is applied to amplify the ignition energy of deflagration to detonation transition in boron-rich gelled propellant, which has not been seen ever. Results show that the ignition energy is positively correlated with initial pressure formed by combustible gas products. The multiphase detonation wave of boron-rich gelled propellant is successfully induced by premixed H/O mixtures, and its detonation propagation characteristic is closely associated with the increase of initial pressure of premixed gas and mass mixing ratio of working medium. The pressure peak and propagation velocity of detonation wave show a considerable improvement with increasing initial pressure of premixed combustible gas and mass mixing ratio, and the highest values can reach up to 8.65 MPa and 2750 m/s respectively.

中文翻译：

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富硼胶凝推进剂在静态预混可燃气体中爆轰特性实验研究

对空气-煤油-硼多相混合物中的爆震进行了实验研究，重点研究了多相脉冲爆震的起爆和传播特性。以富硼煤油凝胶推进剂为燃料，分析其在静态预混可燃气体中的爆轰特性。分别阐明了影响起爆的因素，包括推进剂的成分、雾化和点火方法。考虑到雾化、蒸发和燃烧，采用小分子有机化合物来制造富含大量硼颗粒的金属化凝胶推进剂。通过目视观察装置对不同硼含量的凝胶推进剂的动态雾化进行成像，并根据实际起爆条件适当优化喷射参数。采用热湍流射流的火焰喷射来放大富硼凝胶推进剂爆燃到爆轰转变的点火能量，这是前所未有的。结果表明，点火能量与可燃气体产物形成的初始压力呈正相关。预混H/O混合物成功诱导了富硼胶凝推进剂的多相爆轰波，其爆轰传播特性与预混气体初始压力和工质质量混合比的增加密切相关。随着预混可燃气体初始压力和质量混合比的增加，爆轰波的压力峰值和传播速度都有较大改善，最高值分别可达8.65 MPa和2750 m/s。