Experimental study on flow field of high temperature supersonic impinging jet injected by water

In order to decrease the temperature of flow field of engine plume impinging jet, and weaken the impact and ablation effect on the launcher, an experimental study was developed on flow field of high temperature supersonic impinging jet injected by water. The films of flow field were photographed and compared under two conditions of no-water-injected and water-injected by two non-contact measuring devices of high-speed photography and infrared thermograph, and the temperature of impinging region on bottom plate was measured by thermocouples. Two-phase impinging flow structure and temperature distribution under condition of water-injected were detailedly analyzed and researched, and then compared with condition of no-water-injected. It is concluded that the length and area of potential core have been reduced, the temperature of head face can be decreased, and the thermal impact and ablation effect can be weakened by water injection.