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Research Papers: Forced Convection

Convective Heat Transfer on a Rotating Disk With Transverse Air Crossflow

[+] Author and Article Information
Benjamin Latour

Département EEA  HEI, F-59000 Lille, France; Université de Lille Nord de France, F-59000 Lille, France; TEMPO/DF2T, UVHC, F-59313 Valenciennes, Francebenjamin.latour@hei.fr

Pascale Bouvier

Département EEA  HEI, F-59000 Lille, France; Université de Lille Nord de France, F-59000 Lille, France; TEMPO/DF2T, UVHC, F-59313 Valenciennes, Francepascale.bouvier@hei.fr

Souad Harmand1

 Université de Lille Nord de France, F-59000 Lille, France; TEMPO/DF2T, UVHC, F-59313 Valenciennes, Francesouad.harmand@univ-valenciennes.fr

1

Corresponding author.

J. Heat Transfer 133(2), 021702 (Nov 03, 2010) (10 pages) doi:10.1115/1.4002603 History: Received February 11, 2010; Revised August 23, 2010; Published November 03, 2010; Online November 03, 2010

In this study, the local convective heat transfer from a rotating disk with a transverse air crossflow was evaluated using an infrared thermographic experimental setup. Solving the inverse conduction heat transfer problem allows the local convective heat transfer coefficient to be identified. We used the specification function method along with spatio-temporal regularization to develop a model of local convective heat transfer in order to take lateral conduction and 2D geometry into account. This model was tested using rotational Reynolds numbers (based on the cylinder diameter and the peripheral speed) between 0 and 17,200 and air crossflow Reynolds numbers between 0 and 39,600. In this paper, the distribution of the local heat transfer on the disk allows us to observe the combined effect of the rotation and air crossflow on heat exchanges. This coupling is able to be taken into account in a correlation of mean Nusselt number relative to both Reynolds numbers.

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Figures

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Figure 1

Local Nusselt number on a rotating disk in air crossflow (9)

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Figure 2

3D boundary layer separation and horseshoe vortex system in the region of interaction between mainstream boundary layer and cylinder (10)

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Figure 3

Representation of the test facility: (a) experimental setup and (b) disk geometry

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Figure 4

The eight angular locations of measurement at each turn

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Figure 5

Perpendicular view of the disk

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Figure 6

Influence of regularization on heat transfer coefficient identification

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Figure 7

Determination of αopt

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Figure 8

Local heat transfer coefficient in W m−2 K−1 from a rotating disk in still air: (a) Reω=4300 and ReU=0 and (b) Reω=17,200 and ReU=0

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Figure 9

Nu¯ against Reω for a rotating disk in still air

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Figure 10

Local heat transfer coefficient in W m−2 K−1 from a stationary disk in air crossflow: (a) Reω=0 and ReU=11,350 and (b) Reω=0 and ReU=33,950

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Figure 11

Nu¯ against ReU for a stationary disk in air crossflow

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Figure 12

Local heat transfer coefficient in W m−2 K−1 from a rotating disk in air crossflow: (a) Reω=4300 and ReU=11,350, (b) Reω=4300 and ReU=33,950, (c) Reω=17,200 and ReU=11,350, and (d) Reω=17,200 and ReU=33,950

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Figure 13

Ratio of mean Nusselt numbers against Reynolds number ratio

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Figure 14

Evolution of Nu¯ with Reω for various ReU values

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