Numerical Simulation of Traditional Chinese Medicine Paste in a Combined Paddle Kettle of the"Bullhorn Tube"Type
In order to solve the problem of uneven heating and low mixing efficiency of Chinese medicine paste with high viscosity in stirring kettle,a new type of"bullhorn tube"type combined paddle was designed.Based on the transient slip grid method in computational fluid dynamics(CFD),the numerical simulation of the flow field in the stirred tank under the heating of the inner coil was carried out,and the universal experimental verification of one of the working conditions was carried out to explore the flow field and temperature distribution of the traditional Chinese medicine paste in the stirred tank.The influence of the same combined propeller on the flow field at different speeds and different combined OARS at the same speed was analyzed.The results show that the new combined paddle has the highest temperature and flow field mixing efficiency in the kettle at the rotational speed of 300 r/min,and in this rotational speed,comparing the new combined paddle with the traditional combined paddle,the"turbine blade"combined paddle has a weak influence on the temperature distribution in the kettle,which is not applicable to the industrial production,and the"large blade"combined paddle has a weak influence on the temperature distribution in the kettle,which is not applicable to the industrial production.The mechanical stirring power consumption and temperature difference inside the kettle of the"big blade"type combined paddle are larger than the new combined paddle,which makes the new combined paddle better than the traditional combined paddle in many aspects.Provide reference for industrial production.
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