Abstract
Fully developed turbulent flow through three concentric annuli was investigated experimentally for a Reynolds-number rangeRe= 2 × 104−2 × 105. Measurements were made of the pressure drop, the positions of zero shear stress and maximum velocity, and the velocity distribution in annuli of radius ratios α = 0.02, 0.04 and 0.1, respectively. The results for the key problem in the flow through annuli, the position of zero shear stress, showed that this position is not coincident with the position of maximum velocity. Furthermore, the investigation showed the strong influence of spacers on the velocity and shear-stress distributions. The numerous theoretical and experimental results in the literature which are based on the coincidence of the positions of zero shear stress and maximum velocity are not in agreement with reality.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Reference73 articles.
1. Michiyoshi, I. & Nakajima, T. 1968 Fully developed turbulent flow in a concentric annulus.J. Nucl. Sci. Tech. 5,354.
2. Quarmby, A. 1969 Improved application of the von Kármán similarity hypothesis to turbulent flow in ducts.J. Mech. Engng Sci. 11,14.
3. Crookston, R. B. 1966 Heat and momentum transfer for turbulent flow in annuli with small cores. Ph.D. thesis,Carnegie Institute of Technology,Pittsburgh.
4. Marek, J. , Maubach, K. & Rehme, K. 1973 Heat transfer and pressure drop performance of rod bundles arranged in square arrays.Int. J. Heat Mass Transfer,16,2215.
5. Roberts, A. 1967 A comment on the turbulent flow velocity profile in a concentric annulus.Int. J. Heat Mass Transfer,10,709.
Cited by
68 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献