頁籤選單縮合
題名 | Experimental and Numerical Analysis of the Thermal-Hydraulic Characteristics of Elliptic Finned-Tube Heat Exchangers=橢圓狀鰭管熱交換器流特徵的實驗和數值分析 |
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作者 | 張錦裕; 楊智堯; Jang, Jiin-yuh; Yang, Jyh-yau; |
期刊 | 中華民國冷凍空調學會季刊 |
出版日期 | 19970100 |
卷期 | 5:4=18 1997.01[民86.01] |
頁次 | 頁14-27 |
分類號 | 446.64 |
語文 | eng |
關鍵詞 | |
英文摘要 | Fluid Flow and Heat Transfer Over a 4 Rows Elliptic Finned Tube heat E xchanger Having an Axis Ratio 2.83: 1 are Studied Experimentally and Numerically. Three Type of Finned-Tube Configurations Have Been Investigated under the Dry and Wet Conditions for Different Values of Inlet Frontal Velocity Ranging from 2 to 7 m/s: Two Elliptic Finned-Tubes with Staggered and In-Lined Arrangements and One Circular Finned-Tube with Staggered Arrangement. The Experimental Results Indicated That the Average Heat Transfer Coefficient of Elliptic Finned-Tube is 32~46% of the Corresponding Circular Finned-Tube Having the Same Tube Perimeter, While the Pressure Drop for an Elliptic Finned-Tube Bank is Only 26~33% of the Circular Finned-Tube Bank Configuration. The Numerical Results Based on the Laminar, Two-Dimensional Bare Elliptic Tube Bank Model Overestimate the Heat Transfer Coefficient and Underestimate the Pressure Drop. |
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