Numerical Simulation And Optimization On Component For Liquid Jet Speed Reduction And Energy Dissipation

The jet reactor has the advantages of high mass transfer efficiency and good amplification performance.However,the high velocity jet impinging on the liquid surface in the reactor has brought many unfavorable factors to the continuous operation of the reactor.Therefore,the purpose of this paper is to reduce the jet velocity and to prevent the jet from producing bubbles,In this paper,a component installed in the reactor is designed——inclined plate deceleration component.The component is guided by the jet repeatedly colliding energy dissipation so as to achieve the purpose of shock prevention in the device.First,this paper compares the related components directly to the hydro-cyclone separation method for representing and using the principle of the collision has shortcomings,a combination of the current conditions and limited cooperation unit device factors,determined by the inclined plate to louver structure based evolution of the energy dissipation component reduction.In this paper,the numerical simulation method is used to establish the oblique plate component model with different parameters,in order to investigate the influence of the inclined angle,spacing and height of the inclined plate on the energy dissipation effect and the flow pattern of the medium.In this paper,GAMBIT is used to mesh the model,and the flow field is calculated by using FLUENT.In this paper,in determining the structure of the component,established a complete model of the components within the basin,using the VOF model of multiphase flow on the flow field in the generator component operating conditions were simulated,simulation analysis and research of the component in the velocity distribution,flow pattern of wall turbulence in the medium level and component.The results show that the inclined plate deceleration component can achieve the purpose of reducing the energy dissipation of the jet,and by setting a multilayer inclined plate group,the number of jet collisions can be increased,and the effect of deceleration energy dissipation can be further improved.However,when the flow rate is reduced to a certain extent,the number of inclined plates continues to increase,and the effect of deceleration energy dissipation is not obvious.Under the present device and operation conditions,the flow velocity of the jet can be reduced by about 75% by the deceleration and energy dissipation of the three layers of inclined plate components.The corresponding components are also processed,and the feasibility experiment of the component is carried out on a generator of the cooperative unit.On the basis of this experiment,the numerical simulation method is used to improve the optimization.Then,further performance experiments are conducted to evaluate quantitatively the effect of component deceleration.The experimental results show that the 4 types of components are designed in this paper can at low and middle speed conditions,the jet velocity is reduced to the initial 15% to 30%,in the low speed,good adaptability,through the implementation of the deceleration of energy dissipation can reduce the bubble formation requirements.The numerical simulation and practical operation results of the composite component show that the designed plate deceleration component achieves the desired effect and can be installed in the generator to work together.The numerical simulation and experimental results are reliable,which can provide guidance for further design optimization of the inclined plate reducer.