An experimental study on hydrodynamics of multiple tandem jets in cross flow
摘要
Understanding of flow characteristics of multiple tandem jets is essential to the study on the mechanism of diffusion and ionic transport in the jets.In this study,a particle image velocimetry technique is used to measure the hydrodynamics of multiple tandem jets in cross flow with 1,2,4 nozzles.The experimental results show that the entrainment on the front face of the first jet in a nozzle group is apparently stronger than that of a single jet.The region between two jets can be divided into two parts.The flow in the upstream part of the region is entrained into the front jet,while the flow in the downstream part will be entrained into the rear jet.The cross flow velocities in front of the rear jets are apparently smaller than that of the first jet.There exists an effective cross flow velocity that makes the rear jet bends.