Friction and Heat Transfer in Square and Circular Channels Containing Smooth Tubes and Finned Tubes; FROTTEMENT ET TRANSFERT DE CHALEUR DANS DES CHENAUX CARRES ET CIRCULAIRES CONTENANT DES TUBES LISSES ET DES TUBES MUNIS D'AILETTES
Technical Report
·
OSTI ID:4224220
Different methods for the study of heat transfer and friction in cylirdnical tubes containing smooth or finned heated cores are presented. The characteristic heat tranafer coefficient ard the associated characteristic surface temperature arc discussed. The experimental channel built to study the cooling of finned cans is described with emphasis on the electrical heating with graphite tubes amd the technique for measurement of the surface temperature with a special thermoelectric gage. The hydraulic radius rule is generalized for the consideration of profiles having tangential contact between core and channel wall. The results are presented in dimensional groups which permits comparison of the friction and heat transfer obtained in tubes of widely different geometries. The. results the compared with those obtained by previous workers. The importance of broken longitudinal fins is shown by the experimental results. (tr- auth)
- Research Organization:
- Brussels. Centre d'Etude de l'Energie Nucleaire
- NSA Number:
- NSA-13-022846
- OSTI ID:
- 4224220
- Report Number(s):
- BLG-37
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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