Experimetal heat transfer investigation on horizontal cylinder during natural convection
DOI:
https://doi.org/10.15587/1729-4061.2013.19131Keywords:
heat transfer, horizontal tube, free convection, heat emission, boundary layerAbstract
Despite the widespread and long-term investigation of heat transfer and hydrodynamics of a single horizontal cylinder in a large volume in conditions of free convection, both single approach to determining the intensity of heat transfer and final dependences of calculations are absent in the literature. The paper gives the results of the experimental study of heat transfer of the single horizontal cylinder in conditions of free convection in the large volume, in the range of Rayleigh numbers: 9,1·103<Ra<1,7·105. The conclusion is drawn on the possibility of approximating the experimental results on one of the proposed in the literature dependences. In addition, the temperature distribution of the heat transfer agent around the cylinder was investigated. It was shown that the temperature of the medium changes sharply in the wall area and is almost unchanged in the rest of the volume. The temperature distribution is given in dimensionless coordinates, which correspond to both the most evident and the proposed in the literature. The experimental results are well coordinated with the results of mathematical modeling, presented in the literature. At the same time, comparing the results of measurements with the proposed in the literature analytical dependences of the dimensionless temperature distribution in the boundary layer, the conclusion is drawn on an underestimation of the rate of temperature change. To describe more accurately the change of the rate in the wall layer of the midship section is possible by the power dependence, with the indicator 7, not 2 - 4 as it is suggested in the literature.
References
- Джалурия, Й. Естественная конвекция: Тепло- и массообмен [Текст] / Пер. с англ.. – М.: Мир, 1983 – 400с.
- Гебхарт, Б. Свободноконвктивные течения, тепло- и масообмен [Текст] / Б. Гебхарт, Й. Джалурия, Р.Махаджан, Б.Саммакия. В 2-х книгах, кн.1. Пер. с англ.. – М.: Мир, 1991. – 678с.
- Van Dyke, M. An album of fluid motion [Текст] / M. Van Dyke. – The Parabolic Press. Stanford California, 1982. – 184 p.
- Исаченко, В. П. Теплопередача [Текст] / В. П. Исаченко, В. А. Осипова, А. С. Сукомел.–3-е изд., перераб. и доп. – М.:Энергия, 1975. – 487 с.
- Михеев, М.А. Основы теплопередачи [Текст] / М.А. Михеев, И.М. Михеева. – 2 изд. М.: Энергия, 1977. – 344 с.
- Михеев, М.А. Основы теплопередачи [Текст] / М.А. Михеев. – 2 изд. М.: Государственное энергетическое издательство, 1949. – 397 с.
- Цветков Ф.Ф., Григорьев Б.А. Тепломассообмен: Учебное пособие для вузов. – 2-е изд., испр. и доп. – М.: Издательство МЭИ, 2005. – 550 с. Ил
- Wong, H. Y. Heat transfer for engineers [Текст] / H.Y. Wong. – Longman Group, 1977. – 213 p.
- Shklover G.G. Effect of variable physical properties on heat convection around a horizontal cylinder / G. G. Shklover, S. E. Gusev. Journal of Engineering Physics and Thermophysics V. 53, issue 2., 902-908pp. - 1987.
- Paul, M. Natural convection flow from an isothermal horizontal cylinder in presence of heat generation [Текст] / M. Paul. – International Journal of Engineering Science №44 (13-14), 2006. – pp. 949-958.
- Жукаускас, А. А. Конвективный перенос в теплообменниках [Текст] / А. А. Жукаускас. – М.: Наука, 1982. – 472 с.
- Chand, J. Natural convection heat transfer from horizontal cylinders [Текст] / Jagdish Chand, Vir Dharam. – Journal of chemical engineering of Japan, Vol. 12, №3. – 1979. – рр. 242–247.
- Туз, В. О. Визначення характерної температури при теплообміні в умовах вільної конвекції [Текст] / В. О. Туз, Р. В. Неїло// Енергетика, економіка, технології, екологія. - №3.- 2013.
- Sesonske, A. Velocity and temperature distributions about a horizontal cylinder in free convection heat transfer / A. Sesonske. AIChE Journal V.7 issue 2. – 1961.
- Shang, D.-Y. Effect of variable thermophysical properties on laminar free convection of gas / De-Yi Shang; Bu-Xuan Wang. International journal of heat and mass transfer. V.33, issue 7., 1387-1395pp. – 1990.
- Jaluria, Y. (1980) Natural convection: heat and mass transfer. New York: Pergamon press, 400.
- Gebhart, B., Jaluria, Y., Mahajan R.L., Sammakia B. (1988). Buoyancy-induced flows and transport. New York: Hemisphere publishing corp., 678.
- Van Dyke, M. (1982). An album of fluid motion. The Parabolic Press. Stanford California, 184.
- Isachenko, V. P., Osipova, V. A., Sukomel, A. S. (1975). Heat transfer. Moscow, USSR: Energy, 487.
- Miheev, M.A., Miheeva, I.M. (1977). Heat transfer. Moscow “Energy”, 344.
- Miheev, M.A. (1949). Heat transfer. Moscow, State energy press., 397.
- Tsvetkov, F.F., Grigoriev B.A. (2005). Heat and Mass Transfer. Moscow, Power Engineering Institute, 550.
- Wong, H. Y. (1977). Heat transfer for engineers. Longman Group, 213.
- Shklover, G.G., Gusev, S. E. (1987). Effect of variable physical properties on heat convection around a horizontal cylinder. Journal of Engineering Physics and Thermophysics, V. 53, Is. 2., 902-908.
- Paul, M. (2006). Natural convection flow from an isothermal horizontal cylinder in presence of heat generation. International Journal of Engineering Science 44 (13-14): 949-958.
- Zhukauskas, A. A. (1982). Convective heat transfer in heat exchangers. Moscow, USSR: Science, 472.
- Chand, J. (1979). Natural convection heat transfer from horizontal cylinders / Jagdish Chand, Vir Dharam. Journal of chemical engineering of Japan, Vol. 12, №3, 242–247.
- Tuz, V. O., Neilo, R. V. (2013). Viznachennja harakternoї temperaturi pri teploobmіnі v umovah vіl'noi konvekcіi. Energetika, ekonomіka, tehnologіi, ekologіja, 3.
- Sesonske, A. (1961). Velocity and temperature distributions about a horizontal cylinder in free convection heat transfer. AIChE Journal, V. 7, Is. 2.
- Shang, D.-Y., Wang, Bu-Xuan (1990). Effect of variable thermophysical properties on laminar free convection of gas. International journal of heat and mass transfer, V.33, Is. 7, 1387-1395.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2014 Роман Володимирович Неїло, Валерій Омелянович Туз
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.