Mechanics in Engineering ›› 2010, Vol. 32 ›› Issue (4): 22-26.DOI: 10.6052/1000-0879-lxysj2010-011

• Application study • Previous Articles     Next Articles

AN EXPERIMENTAL STUDY ON INTERACTION OF ENERGETIC GAS JET AND LIQUID

  

  • Received:2010-01-11 Revised:2010-04-14 Online:2010-08-08 Published:2010-08-23

Abstract: 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.

Key words: BLPG, stepped-wall chamber, gas jet expansion, gas and liquid mixing, congested jet