中文摘要：

为了探索高温高压双股燃气射流在整装式液体工质中的扩展特性，设计了五级圆柱渐扩型观察室和圆柱型观察室，借助数字高速录像系统，观察了双股燃气射流在充液室中的扩展过程，对比了不同的观察室边界以及不同的参数条件对双股燃气射流扩展过程的影响。实验结果表明，圆柱渐扩型观察室结构更有助于改善气液的掺混特性，通过参数的合理匹配可以一定程度上控制双股燃气射流在三维充液室中的扩展过程。

英文摘要：

A five-stage cylindrical stepped-wall observation chambers and a cylindrical observation chambers were designed to explore the expansion characteristics of high-temperature high-pressure twin combustion-gas jets in bulk-loaded liquid. The expansion processes of the twin combustion-gas jets in the designed chambers filled with liquid were observed by using a high-speed photographic sys- tem. The influences of the different observation chamber boundaries and the conditional parameters were compared. The experimental results show that the cylindrical stepped-wall observation chambers can be more helpful for improving the mixing characteristics of twin gas jets with liquid. And the ex- pansion processes of the twin combustion-gas jets in the three-dimensional filled-liquid chambers can be controlled in a certain degree by correctly matching the condition parameters.