Heat transfer to liquid metals flowing turbulently in eccentric annuli
An analytical study was carried out to determine the effects of the degree of eccentricity of the two circles of an annulus on both local and average heat transfer coefficients for turbulent flow of liquid metals. The study was based on the conditions of (a) heat transfer to or from the inner wall only, (b) uniform heat flux, and (c) fully developed temperature and velocity profiles. The scope of the investigation is indicated by the following ranges of parameters studied: Reynolds number, 5 x 104 to 10 6; Peclet number, 368 to 8000; Ratio of outer to inner radius, 1.0 to 4.0; and, Eccentricity, up to 70% of maximum displacement. The results showed that eccentricity can have very great effects on both the local and average heat transfer coefficients and consequently on the circumferential temperature variations around the annulus walls. At a radius ratio of 1.5 and a Peclet number of 1700, for example, the average coefficient was found to decrease 63 and 93%, when the eccentricity was increased from 0.0 to 0.30 and from 0.0 to 0.70, respectively. Under these conditions, the ratios of total circumferential temperature difference to the difference between the average inner wall and the stream bulk temperature were found to be 3.20 and 3.55 respectively. The results of the study make it possible to predict, with some certainly, local and average heat transfer coefficients for liquid metals flowing turbulently through eccentric annuli under the above boundary conditions. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States); Polytechnic Institute of Brooklyn, NY (United States)
- Sponsoring Organization:
- US Atomic Energy Commission (AEC)
- NSA Number:
- NSA-19-022500
- OSTI ID:
- 4889240
- Report Number(s):
- BNL-8497; CONF-650205-1
- Journal Information:
- Nuclear Science and Engineering, Vol. 24, Issue 2; Conference: AIChE meeting, Houston, TX (United States), Feb 1965; Other Information: Preprint 43f; CONF-650205-1; BNL-8497; Related Information: For journal publication, the paper was split into a part I and a part II in the same journal. The journal information in this record refers to part 1. Part II was published in Vol. 27, No. 1, pp. 1-9, Jan 1967; ISSN 0029-5639
- Publisher:
- American Nuclear Society
- Country of Publication:
- United States
- Language:
- English
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