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Abstract
At present,impinging stream technology was widely used in chemical engineering and various process industries.In order to further study the flow characteristics in the impinging stream mixer,the flow field characteristics in the impinging stream mixer were analyzed by numerical simulation.The fluid velocity,turbulent kinetic energy and pressure distribution in the impinging stream reactor under different momentum ratio and nozzle spacing were simulated to explore the effects of different inlet momentum ratio on the flow field characteristics of the impinging stream mixer.The results showed that the larger the momentum ratio of the two nozzles on the xOy section,the greater the fluid pressure and the greater the pressure gradient distribution.The turbulent kinetic energy distribution decreased gradually along the radial direction.The radial fluid velocity and pressure on the impact surface were analyzed.It was found that when the nozzle spacing L=2D,the radial fluid velocity presented a bimodal distribution and the fluid pressure presented a single peak distribution.With the increased of momentum ratio,the velocity and pressure of fluid increased as a whole.When L=4D,the radial fluid velocity under non equal momentum impact showed a single peak distribution.Under equal momentum impact(K=1.0),the fluid velocity in the radial direction of the impact surface presented a bimodal distribution.The pressure level of non equal momentum impact was lower than that of equal momentum impact.
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