Flow Pattern and Mixing Performance of a Dynamic Impinging Stream Reactor

Abstract The mixing process of a dynamic impinging stream reactor was measured by planar laser induced fluorescence. The fluid flow pattern and mixing characteristics were studied under different conditions. The flow field was divided into the following regions by flow pattern: free jet region, impingement region, radial jet region, and radial vortex region. The mixing characteristics were analyzed under different operational conditions. The mixing time first decreased and then increased with increasing nozzle spacing. The mixing time decreased with increasing outlet velocity difference and outlet average velocity, and the optimal working conditions were nozzle spacing L = 4 d , where d is nozzle diameter, outlet velocity difference v d = 1 m s −1 , and outlet average velocity v p = 1.7 m s −1 .