INVESTIGATION THE EFFECT OF ASPECT RATIO ON THE FREE HEAT CONVECTIVE INSIDE A HORIZONTAL HEATED TUBE

المؤلفون

  • Saad Najeeb Shehab Mechanical Engineering Department, Mustansiriyah University, Baghdad, Iraq مؤلف

الكلمات المفتاحية:

horizontal tube، free-convection، internal ring fins، experimental investigation، aspect ratio

الملخص

In this work, an experimental investigation has been done for steady-state free heat convection into a heated externally horizontal open ends circular tube with and without internal ring fins. The tests are carried out for five different aluminum tubes in aspect ratios. Another four tubes are used providing internal ring fins with varying fin spacing and constant aspect ratio . Wide levels of the wall heat fluxes (254 - 2267) W/m2 are used. The influence of aspect ratio , heat flux , ring fins , fin spacing on the free-convection through a heated tube are analyzed and discussed. The experimental results indicate that the local Nusselt number increases with decreasing the aspect ratio. Also the results appear that the free heat convection performance through the tube in terms of local Nusselt number improved with internal fins about 25% higher than without fins. An experimental correlations of local and average Nusselt numbers as a function of Rayleigh number for a wide range of aspect ratios under uniform wall heat flux condition are concluded.

التنزيلات

Key Dates

منشور

2017-05-01

إصدار

مجلد 21 عدد 3 (2017): Journal of Engineering and Sustainable Development

القسم

Articles

الرخصة

Creative Commons License

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The Journal of Engineering and Sustainable Development is an open-access journal that all contents are free of charge. Articles of this journal are licensed under the terms of the Creative Commons Attribution International Public License CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/legalcode) that licensees are unrestrictly allowed to search, download, share, distribute, print, or link to the full texts of the articles, crawl them for indexing and reproduce any medium of the articles provided that they give the author(s) proper credits (citation). The journal allows the author(s) to retain the copyright of their published article.
Creative Commons-Attribution (BY)

كيفية الاقتباس

INVESTIGATION THE EFFECT OF ASPECT RATIO ON THE FREE HEAT CONVECTIVE INSIDE A HORIZONTAL HEATED TUBE. (2017). مجلة الهندسة والتنمية المستدامة, 21(3), 119-135. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/539

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