Experimental study into effect of developing section length on the heat transfer process in a horizontal annulus
Other Title(s)
دراسة عملية لتأثير طول مقطع التشكيل على عملية انتقال الحرارة بتجويف حلقي أفقي
Joint Authors
Muhammad, Aqil Abd Allah
Jadoaa, Amir Abd
Source
al-Rafidain Engineering Journal
Issue
Vol. 19, Issue 6 (31 Dec. 2011), pp.62-72, 11 p.
Publisher
University of Mosul College of Engineering
Publication Date
2011-12-31
Country of Publication
Iraq
No. of Pages
11
Main Subjects
Topics
Abstract AR
تم إجراء تجارب عملية لدراسة عملية انتقال الحرارة بمنطقة التشكيل الحراري لتجويف حلقي متمركز بأنبوب داخلي معزول و أنبوب خارجي مسخن تسخين منتظم.
استخدمت ثلاث أطوال لمقاطع الدخول للحصول على جريان تام التشكيل الهيدرديناميكي (L/Dh=50.75 and 100).
غطت الدراسة مدى رقم Re (450 ≤ Ri ≤ 0.7).
بينت النتائج بأن عملية انتقال الحرارة بالجزء السفلي للتجويف الحلقي أفضل من الجزء العلوي, و مقاومة الدوامة يزداد بزيادة رقم Ra و رقم Re.
تم استنباط معادلة تجريبية لمعدل رقم Nu كدالة لرقم Re و رقم Ra و قيمة (L/Dh)cal.
لمقطع المخمد و قورنت مع الأدبيات السابقة لتعطي نفس السلوك و المنحنى.
Abstract EN
An experimental investigation has been presented to study the heat transfer process in thermally developed region of horizontal concentric annulus with an adiabatic inner tube and uniformly heated outer tube.
Three lengths of entrance section have been used to achieve the hydrodynamically fully developed flow before test section with (L / Dh=50,75 and 100).
The study has covered the range of Reynolds number (450 ≤ Re ≤ 2000) and Richarson number (0.1 ≤ Ri ≤ 0.7).
Results show that the heat transfer process in the lower part of annulus is better than that in the upper part; and the vortex strength increases as Rayligh and Rynolds numbers increase.
An empirical correlation for the average Nusselt number as a function of Rayliegh and Reynolds numbers and L / Dh has been deduced and compared with available literatures to give the same trend and behavior.
American Psychological Association (APA)
Jadoaa, Amir Abd& Muhammad, Aqil Abd Allah. 2011. Experimental study into effect of developing section length on the heat transfer process in a horizontal annulus. al-Rafidain Engineering Journal،Vol. 19, no. 6, pp.62-72.
https://search.emarefa.net/detail/BIM-309613
Modern Language Association (MLA)
Jadoaa, Amir Abd& Muhammad, Aqil Abd Allah. Experimental study into effect of developing section length on the heat transfer process in a horizontal annulus. al-Rafidain Engineering Journal Vol. 19, no. 6 (Dec. 2011), pp.62-72.
https://search.emarefa.net/detail/BIM-309613
American Medical Association (AMA)
Jadoaa, Amir Abd& Muhammad, Aqil Abd Allah. Experimental study into effect of developing section length on the heat transfer process in a horizontal annulus. al-Rafidain Engineering Journal. 2011. Vol. 19, no. 6, pp.62-72.
https://search.emarefa.net/detail/BIM-309613
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 71-72
Record ID
BIM-309613