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| Study on the Influence of Structural Parameters of Multi-channel Cylinder Dryer on Heat Transfer Performance |
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| DOI：10.11981/j.issn.1000-6842.2015.03.41 |
| Key Words:paper machine； multi-channel cylinder dryer； condensation heat transfer； correlation formula |
| Fund Project:国家自然科学基金(51375286)“无虹吸管多通道烘缸流体流动及干燥机理的研究”；陕西省重点科技创新团队资助项目(2014KCT-15)；陕西省自然科学基础研究计划重点项目(2012JZ7002)。 |
| Author Name | Affiliation | | 严 彦 | 陕西科技大学机电工程学院,陕西西安,710021 | | 董继先 | 陕西科技大学机电工程学院,陕西西安,710021 | | 汤 伟 | 陕西科技大学机电工程学院,陕西西安,710021 | | 史 韵 | 陕西科技大学机电工程学院,陕西西安,710021 |
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| Abstract: |
| An approach to design a multi-channel cylinder dryer was proposed. The heat transfer performance and flow characteristic with various structural parameters were analyzed. The relationship among the number of channels, aspect ratio, spacing ratio, width, height and hydraulic diameter of a channel was firstly given, then the Cavallini condensing heat transfer coefficient experiment corelation formula and the homogeneous phase flow model were introduced in order to analyze the heat transfer performance and flow characteristic of the multi-channel cylinder dryer affected by different structural parameters. The study revealed that the structural parameters including number of channels, aspect ratio, spacing ratio of a channel dramatically influenced the condensation heat transfer coefficient and frictional resistance of the steam. Based on the selected paper machine, it was suggested that the overall performance of the multi-channel cylinder dryer was the best if the number of channels was 150～200, its aspect ratio and spacing ratio was 1∶3 and 1∶1～1∶3 respectively. |
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