含能气体射流与液体相互作用的实验研究

为了研究整装式液体发射药的燃烧稳定性的控制方法,设计了点火喷射模拟装置及4种多级渐扩型观察室,利用数字高速摄像系统,观察含能气体射流在液体模拟工质中的扩展过程,并对实验中出现的喷孔壅塞现象进行了分析.结果表明:射流在渐扩型结构中扩展稳定,喷射压力、喷孔直径和渐扩结构对射流扩展形态和气液掺混过程有显著影响,通过合理调整这些参数,可以实现对射流扩展过程的有效控制;喷孔壅塞时射流扩展形态非对称,影响气液掺混,不利于控制射流的稳定性.

AN EXPERIMENTAL STUDY ON INTERACTION OF ENERGETIC GAS JET AND LIQUID

In order to study the control of the combustion stability of the bulk-loaded liquid propellant gun (BLPG), a simulating equipment of ignition and injection of the BLPG and four kinds of stepped-wall chambers were designed. A high speed digital video system was used to observe the expansion process of the energetic gas jet in a liquid simulating medium. The congestion phenomenon in the experiment was analyzed. Results show that the jet expansion process in the stepped-wall chamber is stable and the injection pressure, the nozzle diameter and the stepped-wall geometry have a remarkable influence on the jet expansion and the mixing process of gas and liquid, so the jet expansion process can be controlled effectively by adjusting these parameters. The congestion of the nozzle causes dissymmetric jet expansion and affects the mixing process, so that it is unfavorable for controlling the jet stability.