Study on flow and mixing characteristics of impinging stream reactor based on oscillating jet
In order to study the flow field characteristics in the oscillating jet impinging stream reactor,the CFD numerical simulation method was used to establish the mathematical model of the oscillating jet impinging stream reactor by using the SST k-ω turbulence model and compared with the experiment.By analyzing the velocity field,turbulent kinetic energy distribution,pressure field and turbulent viscosity distribution,the internal flow characteristics of the impinging stream reactor were studied,and the change rule of mixing performance was revealed.The results show that in the axial direction,the velocity,turbulent kinetic energy and pressure show a multi-peak distribution trend and increase with the increase of inlet velocity.In the radial direction,the vortex center inside the oscillator mixing chamber is constantly changing due to the small-scale vortex interference of the nozzle,which affects the fluid oscillation and produces four flow patterns in the flow field.The reactor reaches uniform mixing after 35 s,and the mixing intensity reaches more than 0.95.The research results enrich the theory of fluid oscillation characteristics and provide a theoretical reference for the development of new reaction devices.
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