Experimental study of the convective heat transfer from a rotating disc subjected to forced air streams

Trinkl, Claus-Martin; Bardas, Ufuk; Weyck, Alexander; Wiesche, Stefan aus der

doi:10.1016/j.ijthermalsci.2010.08.012

Cited by 27 publications

(4 citation statements)

References 19 publications

(35 reference statements)

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“…In the recent experimental works [WIE10,TRI11], it was also shown that the LES results by [WIE07] underestimate the real heat transfer for such configuration. Authors also point out the influence of the thickness of the disk when positioned in a cross flow.…”

Section: Stationary Diskmentioning

confidence: 96%

Review of fluid flow and convective heat transfer within rotating disk cavities with impinging jet

Harmand

Pellé

Poncet

et al. 2013

International Journal of Thermal Sciences

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Section: Stationary Diskmentioning

confidence: 96%

Review of fluid flow and convective heat transfer within rotating disk cavities with impinging jet

Harmand

Pellé

Poncet

et al. 2013

International Journal of Thermal Sciences

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“…Trinkl et al [8], in 2011, carried out an experimental investigation using a rotating disk attached to a shaft that allowed the disk to rotate at high RPM. During this experiment, Trinkl et al…”

Section: Literature Reviewmentioning

confidence: 99%

Modeling and Simulation of Convective Heat Transfer Caused by a Rotating Disk

Ruiz

Mueller

Abu-Mulaweh

2021

Volume 11: Heat Transfer and Thermal Engineering

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In this study, computational fluid dynamics (CFD) software is used to model and simulate a smooth disk rotating in a still fluid. The primary quantity of interest is the convective heat transfer coefficient. Laminar, transition, and turbulent flow regimes are considered. To ensure that the physical characteristics of the situation are properly captured, the velocity and temperature profiles of the fluid are qualitatively and quantitatively compared to results reported in the literature. By analyzing the velocity and temperature profiles, an estimate for the proper size of the computational domain within the CFD software is obtained. If the computational domain is too small, the velocity and temperature profiles are affected; hence, the calculation of the convective heat transfer coefficient is influenced by the size of the computational domain. Two methods — the global rotation method (GRM) and the local rotation (or sliding) method (LRM) — are used to obtain results for the convective heat transfer coefficient. The global rotation method involves conversion of the specified angular velocity into a mass-distributed force. The local rotation method involves the creation of a secondary body that rotates. The secondary body can cause inaccuracies to appear when discretizing the domain. These inaccuracies cause the local rotation method to be less predictable than the global rotation method. An extensive and systematic verification and validation study of the two methods is performed with validation achieved by comparing the calculated values to published correlations and measured results. Both methods demonstrate agreement with the expected heat transfer coefficient value by maintaining a difference of less than 3% for low angular velocities. At higher angular speeds, the global rotation method maintains less than a 3% difference, once an appropriate mesh is established and the turbulent parameters are set correctly. Over the entire range of parameters considered, the global rotation method is best suited to model and simulate a singular disk rotating in still air. The global rotation method does not require the introduction of a secondary body and yields predictable and uniform convergence to published values as the mesh size is reduced. Relationships between accuracy, grid size, and computational effort are reported. Recommended laminar and turbulent parameter settings are discussed. The results of this fundamental study provide insight and guidance into the proper modeling and simulation of both low-speed and high-speed rotating machinery and equipment.

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“…cally by Latour et al [6,7], Nguyen [8], and aus der Wiesche [9][10][11] who even published a monography on this topic [12].…”

Section: Introductionmentioning

confidence: 99%

Numerical Representation of the Operating Behavior of a Crossflow Friction Turbomachine

Praß¹,

Riedel²,

Renz³

et al. 2019

Chem Eng & Technol

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Based on the Tesla-type turbomachinery principle of operation, a fan consisting of flat, round discs arranged in between two separate channels, which generate two air flows in opposite directions, is investigated. Simulations of a model with one disc as well as a five-channel model at different grids were performed. With almost unthrottled operation, secondary flows could be determined at velocity magnitudes of up to 20 % of the mean main flow velocity, with secondary currents reaching up to 50 % in throttled operation. Besides high dissipation and recirculation, these secondary currencies are found to be capable of reducing the overall efficiency of the system. Thus, topic of further investigations is the potential of increasing efficiency by means of straighteners and geometric adaptions.

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Experimental study of the convective heat transfer from a rotating disc subjected to forced air streams

Cited by 27 publications

References 19 publications

Review of fluid flow and convective heat transfer within rotating disk cavities with impinging jet

Review of fluid flow and convective heat transfer within rotating disk cavities with impinging jet

Modeling and Simulation of Convective Heat Transfer Caused by a Rotating Disk

Numerical Representation of the Operating Behavior of a Crossflow Friction Turbomachine

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