Study on airflow characteristics in the semi-closed irregular narrow flow channel

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• 作者：Yuzhen Jin ; Xiaodong Hu ; Linhang Zhu ; Xudong Hu ; Yingzi Jin
• 刊名：Journal of Thermal Science
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：25
• 期：2
• 页码：123-129
• 全文大小：1,141 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Mechanics, Fluids and Thermodynamics
  Engineering Fluid Dynamics
  Engineering Thermodynamics and Transport Phenomena
  Chinese Library of Science
  
• 出版者：Science Press, co-published with Springer-Verlag GmbH
• ISSN：1993-033X
• 卷排序：25

文摘

The air-jet loom is widely used in the textile industry. The interaction mechanism of airflow and yarn is not clear in such a narrow flow channel, the gas consumption is relatively large, the yarn motion is unstable and the weft insertion is often interrupted during the operation. In order to study the characteristics of the semi-closed flow field in profiled dents, the momentum conservation equation is modified and the model parameters and boundary conditions are set. Compared with the different r, the ratio of profiled dent’s thickness and gap, the results show that the smaller the r is, the smaller the velocity fluctuations of the airflow is. When the angle of profiled dents α is close to zero, the diffusion of the airflow will be less. The experiment is also conducted to verify the result of the simulation with a high-speed camera and pressure sensor in profiled dents. The airflow characteristics in the semi-closed irregular narrow flow channel in the paper would provide the theoretical basis for optimizing the weft insertion process of the air-jet loom.Keywordsair-jet loomprofiled dentsnumerical simulationairflow characteristicssemi-closed channel