Measuring and analysis methods for the mixing process of jet and gas-solid two-phase flow
In many gas-solid rapid reaction processes,a turbulent jet is an ideal form for the mixing between gas-phase raw materials and solid particles.It is meaningful for understanding reaction processes by using effective measuring techniques and analysis methods to obtain the mixing behavior of jet and gas-solid two-phase flow.The dynamic data of particle concentration is obtained using fiber optic probe technology.On this basis,based on the traditional analysis method of particle clusters in the riser and combined with wavelet analysis,the procedure for identifying clusters in the mixing zone of jet and gas-solid two-phase flow was proposed.Furthermore,the instantaneous contact state between gas and solid in the jet influence zone was divided into three phases,i.e.,the cluster phase,the dispersed particle phase,and the jet phase that was not thoroughly mixed with particles.By combining the theory of jet attachment and the gas tracing method,the centerline equation of the jet under ideal conditions was modified.The results obtained can be predict the development trend of jets in the gas-solid two-phase flow.By using ozone decomposition tracing technology,the local reaction results during the mixing process of feed jet and gas-solid two-phase flow were obtained.By combining this result with gas-solid dynamic mixing characteristics and jet trajectory model,the influence of flow parameters on the reaction can be analyzed.
jetgas-solid two-phase flowgas-solid mixingclusterstreamline model
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