| 引用本文: | 王默雷1,2 ,邓胜祥1,2.折流板结构对立式热交换器物理场的影响(J/M/D/N,J:杂志，M：书，D：论文，N：报纸).期刊名称,2024，41（6）：49-58 |
| CHEN X. Adap tive slidingmode contr ol for discrete2ti me multi2inputmulti2 out put systems[ J ]. Aut omatica, 2006, 42(6): 4272-435 |
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| 摘要: |
| 目的 为分析并比较不同结构的折流板对热交换器温度场、压力场和流场的影响,提高热交换器的换热效
果,采用 ANSYS FLUENT 软件对热交换器进行数值模拟。 方法 基于某工业园区分布式能源系统,针对系统内的立
式热交换器进行数值模拟研究,并根据数值模拟研究结果对热交换器进行结构优化。 结果 折流板的开口夹角越
小,空气出口温度越高,当折流板的开口夹角从 180°减小至 30°时,空气出口温度提升 11. 82%,但同时在热交换器
出口处空气速度明显升高,导致外筒承受的冲击较大;折流板的间距越小,空气出口温度越高,当折流板的间距从
220 mm 减小至 110 mm,空气出口温度提升 14. 99%,烟气通过内筒壁面与空气换热接触时间变短,且烟气速度在
烟气出口明显上升;折流板的开口面积越小,空气出口温度越高,当折流板外圆直径从 2 170 mm 增大至 2 770 mm,
空气出口温度提升 9. 22%。 结论 对立式换热器进行结构优化时,应应适当减小折流板的开口夹角或减小折流板的
开口面积,同时减小折流板的间距,使空气能够在热交换器内部进行充分地换热。 |
| 关键词: 立式热交换器 折流板 数值模拟 结构优化 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Influence of Baffle Structure on Physical Field of Vertical Heat Exchange |
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WANG Molei1 1,2 DENG Shengxiang1,2
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1. School of Mechanical and Automotive Engineering Shanghai University of Engineering Science Shanghai 201620
China
2. Institute of New Energy and Energy Saving Technology Shanghai University of Engineering Science Shanghai 201620
China
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| Abstract: |
| Objective In order to analyze and compare the effects of different baffles on the temperature field pressure
field and flow field of the heat exchanger and improve the heat transfer effect of the heat exchanger ANSYS FLUENT
software was used to simulate the heat exchanger. Methods Based on the distributed energy system of an industrial park
the numerical simulation of the vertical heat exchanger in the system was carried out and the structure of the heat
exchanger was optimized according to the numerical simulation results. Results The smaller the opening angle of the
baffle was the higher the air outlet temperature was. When the opening angle of the baffle decreased from 180° to 30°
the air outlet temperature increased by 11. 82%. At the same time the air velocity at the outlet of the heat exchanger
increased significantly resulting in a greater impact on the outer cylinder. The smaller the baffle spacing was the higher
the air outlet temperature was. When the baffle spacing decreased from 220 mm to 110 mm the air outlet temperature was
increased by 14. 99% the contact time between the flue gas and the air through the inner cylinder wall became shorter
and the flue gas velocity increased significantly at the flue gas outlet. The smaller the opening area of the baffle the
higher the air outlet temperature. When the outer diameter of the baffle increased from 2 170 mm to 2 770 mm the air outlet temperature increased by 9. 22%. Conclusion When optimizing the structure of the vertical heat exchanger the
opening angle of the baffle should be appropriately reduced or the opening area of the baffle should be reduced and the
spacing of the baffle should be reduced so that the air can be fully transferred inside the heat exchanger. |
| Key words: vertical heat exchanger baffles numerical simulation structural optimization |
