| 高流速时横掠管束的流动阻力特性实验研究 |
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| 引用本文： | 那伟,徐国强,陶智,丁水汀.高流速时横掠管束的流动阻力特性实验研究[J].推进技术,2003,24(5):444-447. |
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| 作者姓名： | 那伟 徐国强 陶智 丁水汀 |
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| 作者单位： | 北京航空航天大学,能源与动力工程学院,北京,100083 |
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| 基金项目： | 国家“九七三”基金资助项目，国家重点实验室基金(51 4590 3 0 1 0 3JW0 1 1 2 )资助 |
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| 摘 要： | 为了在空气流速很高的航空发动机外涵道中使用管式空-空换热器，用实验的方法研究了高流速时考虑压缩效应影响的椭圆管束和圆管束的流动阻力特性，并对二者进行了对比。结果表明：相同几何排列情况下，两种管束的阻力系数随雷诺数的变化趋势大体相同；但椭圆管束的阻力系数明显低于圆管的阻力系数。在实际使用中应首选椭圆管束结构形式。
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| 关 键 词： | 航空发动机 管式热交换器 管流 粘性阻力 |
| 文章编号： | 1001-4055(2003)05-0444-04 |
| 修稿时间： | 2002年11月13 |
Experimental investigation on flow resistance through cross-flow over tube bundles with high air speed |
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| NA Wei,XU Guo-qiang,TAO Zhi and DING Shui-ting.Experimental investigation on flow resistance through cross-flow over tube bundles with high air speed[J].Journal of Propulsion Technology,2003,24(5):444-447. |
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| Authors: | NA Wei XU Guo-qiang TAO Zhi and DING Shui-ting |
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| Institution: | School of Jet Propulsion, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China;School of Jet Propulsion, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China;School of Jet Propulsion, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China;School of Jet Propulsion, Beijing Univ. of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | In order to use air/air tube heat exchanger in bypass of aero-engine in which air flow speed is very high, experiments were carried out to determine the flow resistance characteristics of the cross-flow through elliptical and circular tube bundles under the condition of high air flow speed. The compression effect was included. It shows that with the same geometrical arrangements, the flow resistance coefficients of two kinds of bundles show relatively similar trends with the increasing of Reynolds number. However, the coefficient of flow resistance over the elliptical tube bundles is remarkably lower than that of circular bundles. |
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| Keywords: | Aircraft engine Tube heat exchanger Pipe flow Viscous drag |
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