Heat Transfer Coefficients in Concentric Annuli

Author:

Dirker Jaco1,Meyer Josua P.2

Affiliation:

1. Department of Mechanical Engineering, Rand Afrikaans University, Johannesburg, South Africa

2. Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, 0002, South Africa

Abstract

The geometric shape of a passage’s cross-section has an effect on its convective heat transfer capabilities. For concentric annuli, the diameter ratio of the annular space plays an important role. The purpose of this investigation was to find a correlation that will accurately predict heat transfer coefficients at the inner wall of smooth concentric annuli for turbulent flow of water. Experiments were conducted with a wide range of annular diameter ratios and the Wilson plot method was used to develop a convective heat transfer correlation. The deduced correlation predicted Nusselt numbers accurately within 3 percent of measured values for annular diameter ratios between 1.7 and 3.2 and a Reynolds number range, based on the hydraulic diameter, of 4 000 to 30,000.

Publisher

ASME International

Subject

Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science

Reference14 articles.

1. Davis, E. S. , 1943, “Heat Transfer and Pressure Drop in Annuli,” Trans. ASME, Oct, pp. 755–760.

2. McAdams, W. H., 1954, Heat Transmissions, 3rd ed., McGraw-Hill, New York, pp. 241–244.

3. Foust, A. S., and Christian, G. A., 1940, “Non-Boiling Heat Transfer Coefficients in Annuli,” American Institute of Chemical Engineers, 36, pp. 541–554.

4. Monrad, C. C., and Pelton, J. F., 1942, “Heat Transfer by Convection in Annular Spaces,” American Institute of Chemical Engineers, 38, pp. 593–611.

5. Wiegand, J. H., McMillen, E. L., and Larson, R. E., 1945, “Discussion on: Annular Heat Transfer Coefficients for Turbulent Flow,” American Institute of Chemical Engineers, 41, pp. 147–153.

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3