Experimental local heat-transfer and average friction coefficients for subsonic turbulent flow of air in an annulus at high temperatures

Donne, M. Dalle; Meerwald, E.

doi:10.1016/0017-9310(66)90134-7

Cited by 18 publications

(10 citation statements)

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“…In presence of significant temperature differences between inner tube thermocouples placed at opposite sides, the test was rejected. Furthermore, the heat balances in the present experiments were considerably better than those relative to the experiments reported in [4]. All this has as a consequence that the correlations obtained in the present paper differ quite considerably from those reported in [4].…”

Section: Introductioncontrasting

confidence: 56%

“…Furthermore, the heat balances in the present experiments were considerably better than those relative to the experiments reported in [4]. All this has as a consequence that the correlations obtained in the present paper differ quite considerably from those reported in [4]. For the reasons stated above and also because the present results agree much better with theoretical considerations as we will see in the present paper, we consider the correlations of [4] as superseded by the present ones.…”

Section: Introductioncontrasting

confidence: 43%

“…The first results of this experiment have been already published [4]. Since then the experimental equipment has been improved in many ways, namely: The test section is vertical and not horizontal thus reducing possible eccentricities between inner and outer tube.…”

Section: Introductionmentioning

confidence: 97%

“…Although the gases foreseen as possible reactor coolants are helium, CO z or water superheated steam as in the experiments of [4], air is the coolant used.in the present experiment. This simplifies the experiment very much.…”

Section: Introductionmentioning

confidence: 99%

“…This equation takes into account the pressure drop due to acceleration. Its derivation is shown in [4].…”

mentioning

confidence: 99%

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Heat transfer and friction coefficients for turbulent flow of air in smooth annuli at high temperatures

Donne¹,

Meerwald²

1973

International Journal of Heat and Mass Transfer

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Abstract-Local heat transfer and averaged friction coefficients were measured for subsonic turbulent flow of air through two smooth annuli, with diameter ratios equal to 1'99 and 1·38, respective1y, having the inner tube heated up to temperatures of 1000°C. The main experimental results can be summarized as follows 1. The loca1heat-transfer coefficients are corre1ated by:TE which gives the Petukhov and Roizen corre1ation [13] for 10w temperature differences (TwITE ---> 1).2. The average heat-transfer coefficients for the inner region of the annulus are correlated by: t De1egated from Euratom to the Fast Breeder Project,

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Section: Introductioncontrasting

confidence: 56%

Section: Introductioncontrasting

confidence: 43%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

“…This equation takes into account the pressure drop due to acceleration. Its derivation is shown in [4].…”

mentioning

confidence: 99%

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Heat transfer and friction coefficients for turbulent flow of air in smooth annuli at high temperatures

Donne¹,

Meerwald²

1973

International Journal of Heat and Mass Transfer

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Taylor‐Couette reactor: Principles, design, and applications

et al. 2021

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The Taylor-Couette reactor (TCR) is an apparatus that capitalizes on the Taylor-Couette flow, which allows many flow regimes and conditions to perform (bio-)chemical conversions with precise control of various reactor characteristics. With the possibility to continuously perfuse the reactor with a reaction medium, the TCR becomes interesting for chemical engineering applications. In this review we introduce this reactor type and provide an overview of its history, principles of the flow regimes, and a description and design aspects of the reactors and their elements. Available information in the literature is summarized and harmonized to present available formulas and correlations in a consistent set of variables. Additionally, a wide number of applications in process technology is covered, including reactions in homogeneous, photo and enzymatic catalysis, polymer synthesis, and crystallization and aggregation-flocculation processes. Focusing on this reactor configuration, this article intends to be used as a hub for scientific groups interested in TCRs. This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as

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Reibungsgesetze turbulenter Strömungen

Maubach

1970

Chemie Ingenieur Technik

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Zur Berechnung des Druckverlustes turbulenter Strömungen in geschlossenen Kanälen ist die Kenntnis des Reibungsbeiwertes notwendig. Im folgenden wird die Abhängigkeit des Reibungsbeiwertes von der geometrischen Form des Kanals und der Beschaffenheit der Wand, insbesondere bei künstlichen Rauhigkeiten untersucht. Es wird eine Hypothese angegeben, welche die Ableitung der Reibungsgesetze glatter und rauher konzentrischer Ringspalte aus den Geschwindigkeitsprofilen ermöglicht. Die Resultate werden zur Zusammenfassung und zum Vergleich von Meßergebnissen für Rauhigkeiten in Form von Querrippen mit Rechteckquerschnitt verwendet. Für vom Kreisrohr abweichende Kanalformen wird ein Ordnungsschema angegeben, das die Planung von Experimenten und die Zusammenfassung ihrer Ergebnisse erleichtert.

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Experimental local heat-transfer and average friction coefficients for subsonic turbulent flow of air in an annulus at high temperatures

Cited by 18 publications

References 1 publication

Heat transfer and friction coefficients for turbulent flow of air in smooth annuli at high temperatures

Heat transfer and friction coefficients for turbulent flow of air in smooth annuli at high temperatures

Taylor‐Couette reactor: Principles, design, and applications

Reibungsgesetze turbulenter Strömungen

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