Free Convective Heat Transfer Structures as a Function of the Width of Isothermal Horizontal Rectangular Plates

EWA RADZIEMSKA; WITOLD M. LEWANDOWSKI

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Free Convective Heat Transfer Structures as a Function of the Width of Isothermal Horizontal Rectangular Plates

机译：自由对流换热结构与等温矩形矩形板宽度的关系

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Results are presented for the experimental investigations of free convection heat transfer from upward facing isothermal horizontal rectangular plates as a function of the plate width. Two models of the convective fluid flow structures above horizontal rectangular plates were proposed as a result of flow visualization. Solutions of these models are presented in the form of Nusselt-Rayleigh relations with the aspect ratio as a parameter. Analysis of the visualization results provided a basis for preferring the radial flow pattern at small values of the Rayleigh number, especially for square plates or at the ends of rectangular plates, and a basis for preferring the parallel flow model at large values of the Rayleigh number. From the previous experimental results and the present experimental and interferometric studies, it is shown that the transition Rayleigh number at which the flow changes from the concentric to the parallel flow pattern is a function of the width of the plate.

机译：结果提供了用于实验研究的自由对流传热的面朝上的等温水平矩形板作为板宽的函数。作为流动可视化的结果，提出了两个在水平矩形板上方的对流流体流动结构的模型。这些模型的解决方案以Nusselt-Rayleigh关系的形式给出，其中长宽比为参数。可视化结果的分析为在较小的瑞利数（特别是方形板或矩形板的端部）处首选径向流模式提供了基础，并为在较大的瑞利数值处首选平行流模型提供了基础。从以前的实验结果以及当前的实验和干涉测量研究中，可以看出，流动从同心流向平行流变化的瑞利数是板宽度的函数。

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来源
《Heat Transfer Engineering》 |2005年第4期|p.42-50|共9页
作者
EWA RADZIEMSKA; WITOLD M. LEWANDOWSKI;
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作者单位

Department of Apparatus and Chemical Machinery, Gdansk University of Technology, 80-952 Gdansk, ul. G. Narutowicza 11/12, Poland;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类工业用热工设备;
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专利

1. Experiments on Natural Convection Heat Transfer from an Isothermal Plate on a Semi-Infinite Surface and from a Constrained Horizontal Plate in Air [J] . CZESLAW OLESKOWICZ-POPIEL, JANUSZ WOJTKOWIAK Heat Transfer Research . 2010,第3期

机译：半无限表面上的等温板和空气中受约束的水平板自然对流换热的实验
2. Analysis of natural convection heat transfer through staggered pin finned horizontal base plate within a rectangular enclosure [J] . Satya Prakash Verma, D. Das Heat and mass transfer . 2018,第9期

机译：矩形罩壳内交错交错的翅片水平底板的自然对流传热分析
3. Mixed convective heat transfer in rectangular enclosures driven by a continuously moving horizontal plate [J] . M.A. Waheed International Journal of Heat and Mass Transfer . 2009,第21a22期

机译：由水平移动的平板驱动的矩形外壳中的混合对流传热
4. Natural convection heat transfer from isothermal, horizontal and rectangular plates [C] . Witold M. Lewandowski, Piotr Kubski, Maciej Buzuk, Advances in engineering heat transfer . 1995

机译：等温，水平和矩形板的自然对流传热
5. Laminar natural convection heat transfer from isothermal horizontal cylinders with annular fins [D] . Wang, Chong-Sheng. 1998

机译：带环形翅片的等温卧式圆柱的层流自然对流换热
6. Conjugate Effects of Heat and Mass Transfer on MHD Free Convection Flow over an Inclined Plate Embedded in a Porous Medium [O] . Farhad Ali, Ilyas Khan, Samiulhaq, -1

机译：传热和传质对多孔介质中嵌入的倾斜板上MHD自由对流的共轭效应
7. Discussion: “Force Convection Heat Transfer at an Inclined and Yawed Square Plate—Application to Solar Collectors” (Sparrow, E. M., and Tien, K. K., 1977, ASME J. Heat Transfer, 99, pp. 507–512) and “Local Heat Transfer and Fluid Flow Characteristics for Airflow Oblique or Normal to Square Plate” (Tien, K. K., and Sparrow, E. M., 1979, Internation Journal of Heat and Mass Transfer, 22, pp. 349–359) and “Effect of Finite Width on Heat Transfer and Fluid Flow about an Inclined Rectangular Plate” (Sparrow, E. M., Ramsey, J. W., and Mass, E. A., 1979, ASME J. Heat Transfer, 101, pp. 199–204) [O] . B. Nimmo, S. Zubair 1981

机译：讨论：“在倾斜和偏航的方形板应用于太阳能收集器的强制对流传热”（Sparrow，EM和Tien，KK，1977，Asme J.传热，99，PP。507-512）和“局部热量用于气流倾斜或正常板的转移和流体流动特性“（Tien，KK和Sparrow，EM，1979，热量和传质杂志，22，pp.349-359）和”有限宽度对热量的影响关于倾斜矩形板的转移和流体流动“（Sparrow，EM，Ramsey，JW和Mass，EA，1979，ASME J.传热，101，PP。199-204）

Free Convective Heat Transfer Structures as a Function of the Width of Isothermal Horizontal Rectangular Plates

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