“牛角管”式组合桨釜内中药膏剂的流动传热特性
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TQ461

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吉林省科技发展计划项目(20210401132YY)


Numerical Simulation of Traditional Chinese Medicine Paste in a Combined Paddle Kettle of the "Cow Horn Tube" Type
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    摘要:

    为解决高粘度中药膏剂在搅拌釜内受热不均,混合效率低下等问题,本文设计了新型“牛角管”式组合桨。基于计算流体力学(CFD)中的瞬态滑移网格法,对内盘管加热下搅拌釜流场进行数值模拟研究并对其中一种工况进行了普适性的实验验证,探究搅拌釜内中药膏剂的流场情况及温度分布规律,分析了同一组合桨不同转速下以及同一转速下不同组合桨对流场情况的影响。结果表明:新型组合桨在转速N=300r/min时釜内温度以及流场混合效率最高,在该转速下,将新型组合桨与传统组合桨进行对比,“涡轮叶片”式组合桨对釜内温度分布影响能力弱,不适用于工业生产,“大叶片”式组合桨机械搅拌功耗和釜内温差均大于新型组合桨,使得新型组合桨在多方面优于传统组合桨。为工业生产提供参考。

    Abstract:

    In order to solve the problems of uneven heating and low mixing efficiency of high-viscosity traditional Chinese medicine paste in mixing kettle, a new type of "bullhorn pipe" combined paddle is designed in this paper. Based on the transient slip grid method in Computational Fluid Dynamics (CFD), numerical simulation of the flow field in the stirring kettle under the heating of the inner coil was carried out and one of the working conditions was verified experimentally, to investigate the flow field of the Chinese herbal medicine paste and the temperature distribution law in the stirring kettle, and to analyse the effects of the same combined paddle at different rotational speeds as well as the same rotational speeds of the different combined paddles on the flow field conditions. 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 N=300r/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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李春江,王开宝,王明旭,等. “牛角管”式组合桨釜内中药膏剂的流动传热特性[J]. 科学技术与工程, 2024, 24(17): 7249-7259.
li Chunjiang, Wang Kaibao, Wang Mingxu, et al. Numerical Simulation of Traditional Chinese Medicine Paste in a Combined Paddle Kettle of the "Cow Horn Tube" Type[J]. Science Technology and Engineering,2024,24(17):7249-7259.

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  • 收稿日期:2023-12-21
  • 最后修改日期:2024-04-10
  • 录用日期:2024-02-01
  • 在线发布日期: 2024-06-24
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