| An Experimental and Numerical Study of Natural Convection Heat Transfer in Horizontal Annuli between Eccentric Cylinders |
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| 作者单位： | DepartmentofPowerEngineering,NanjingUniversityofAeronautics＆Astronautics,210016Nanjing,China |
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| 摘 要： | ＡｎＥｘｐｅｒｉｍｅｎｔａｌａｎｄＮｕｍｅｒｉｃａｌＳｔｕｄｙｏｆＮａｔｕｒａｌＣｏｎｖｅｃｔｉｏｎＨｅａｔＴｒａｎｓｆｅｒｉｎＨｏｒｉｚｏｎｔａｌＡｎｎｕｌｉｂｅｔｗｅｅｎＥｃｃｅｎｔｒｉｃＣｙｌｉｎｄｅｒｓ￥ＷａｎｇＳｕｏｆａｎｇ（Ｄｅｐａｒｔｍ...
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| 关 键 词： | 热传导 自然对流 水平环形管 |
An experimental and numerical study of natural convection heat transfer in horizontal annuli between eccentric cylinders |
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| Authors: | Suofang Wang |
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| Affiliation: | (1) Department of Power Engineering, Nanjing University of Aeronautics & Astronautics, 210016 Nanjing, China |
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| Abstract: | Natural convection heat transfer in eccentric annuli made of two isothermal horizontal circular cylinders is numerically investigated.
Bipolar coordinates are used for the eccentric annuli. The governing equations are transformed into finite difference equations
(FDE) by the central difference approach. Heat transfer and flow convection pattern results are simulated for5.0≤Ra
L≤1.0×105, withP
r=0.3 – 100,D
o/Di=1.25 – 5.0, and ɛ=0.01 – 0.95. The axis of the inner cylinder lies on an inclined plane withθ
p=0° – 180°. A Mach-Zehnder interferometer is used for the experimental study. The range is forRa
L=5.3 × 102 – 2.41 × 104, withD
o/Di=2.0, 2.5 and 3.125, ɛ=0.0 – 0.85, andθ
p=0° – 180°. Air is used as the medium. Comparison of the numerical results with the experimental data shows good agreement. |
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| Keywords: | natural convection heat transfer eccentric cylinder horizontal annuli |
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