弯曲折流板弹性管换热的振动与传热研究

IF 1.1 4区 工程技术 Q4 ENGINEERING, MECHANICAL
Qie Xiwang, Ji Jiadong, Li Feiyang, Deng Xu, Zhou Jianxin
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引用次数: 0

摘要

为了有效提高弹性管束换热器的性能,在普通弹性管束换热器的基础上设计了一种弯曲折流板换热器,系统研究了不同进口速度和结构参数下弹性管束换热器的振动和换热特性。结果表明,随着速度的增加,ETB的振动特性显著增加,在[公式:见文]处的ETB平均振幅是[公式:见文]处的4.51倍。同样,随着进口速度的增加,换热性能也随之下降,但ETB的平均换热系数显著增加。当长轴从45 mm增大到75 mm时,ETB的振动强度急剧减小,方向[公式:见文]和总振动[公式:见文]分别减小了43.4和51.5%。同时,ETB的换热系数和增长率分别下降了3.9和45.6%。此外,挡板曲率对振动和传热性能的影响很小。不同折流板曲率下的平均换热系数与总振动幅值的差值小于5%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Vibration and Heat Transfer Study on Elastic-Tube Heat Exchange with Curved Baffle
A heat exchanger with a curved baffle for an elastic-tube bundle (ETB) is designed to effectively improve the performance based on a common ETB heat exchanger, and this paper systematically studies its vibration and heat transfer characteristics under different inlet velocity and structural parameters. The results indicate that the ETB vibration characteristics increase significantly with an increasing velocity, and the average amplitude of the ETB at [Formula: see text] is 4.51 times higher than that at [Formula: see text]. Similarly, the heat transfer performance subsequently decreases, but the average heat transfer coefficient of the ETB is significantly increased with the increase of the inlet velocity. When the long axis increases from 45 to 75 mm, the vibration intensity of the ETB decreases sharply, and the [Formula: see text] direction and the total vibration [Formula: see text] decrease by 43.4 and 51.5%, respectively. At the same time, the heat transfer coefficient of the ETB and its growth rate decrease by 3.9 and 45.6%. Additionally, the baffle curvature has little impact on the vibration and heat transfer performance. The difference between the average heat transfer coefficient and the total vibration amplitude of the ETB for different baffle curvatures is less than 5%.
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来源期刊
Journal of Thermophysics and Heat Transfer
Journal of Thermophysics and Heat Transfer 工程技术-工程:机械
CiteScore
3.50
自引率
19.00%
发文量
95
审稿时长
3 months
期刊介绍: This Journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. The Journal publishes qualified papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include aerothermodynamics; conductive, convective, radiative, and multiphase modes of heat transfer; micro- and nano-scale heat transfer; nonintrusive diagnostics; numerical and experimental techniques; plasma excitation and flow interactions; thermal systems; and thermophysical properties. Papers that review recent research developments in any of the prior topics are also solicited.
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