Experimental Research of the Hydrodynamics of a Turbulent Flow of Air in the Gap Between Rotating Coaxial Cylinders

Kosterin, S. I.; Koshmarov, Yu. A.

doi:10.21236/ad0299664

Cited by 3 publications

(3 citation statements)

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“…The results of the present study for heat transfer coefficient and Nusselt number were compared to several previous studies where the rotor of the machine being studied was heated including the works of Childs and Turner [25], Grosgeorge [26], Kostein and Finat'ev [27], Bouafia et al [28], Nijaguan and Mathiprakasm [29], Hanagida and Kawasaki [30], and Tachibana and Fukui [31]. Each of these investigations proposes a Nusselt number correlation for the Taylor-Couette-Poiseuille flow in a rotating machine.…”

Section: Nusselt Number Correlation Based On Present Studymentioning

confidence: 98%

CFD Study of Forced Air Cooling and Windage Losses in a High Speed Electric Motor

Anderson¹,

Lin²,

McNamara³

et al. 2015

JECTC

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High speed and high efficiency synchronized electric motors are favored in the automotive industry and turbo machinery industry worldwide because of the demands placed on efficiency. Herein an electric motor thermal control system using cooling air which enters from the drive end of the motor and exits from the non-drive end of the motor as the rotor experiences dissipates heat is addressed using CFD. Analyses using CFD can help to find the appropriate mass flow rate and windage losses while satisfying temperature requirements on the motor. Here, the air flow through a small annular gap is fed at 620 L/min (0.011 kg/sec) as the rotor spins at 100,000 rpm (10,472 rad/sec) and the rotor dissipates 200 W. The CFD results are compared with experimental results. Based upon the CFD findings, a novel heat transfer correlation suitable for large axial Reynolds number, large Taylor number, small annular gap Taylor-Couette flows subject to axial cross-flow is proposed herein.

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Section: Nusselt Number Correlation Based On Present Studymentioning

confidence: 98%

CFD Study of Forced Air Cooling and Windage Losses in a High Speed Electric Motor

Anderson¹,

Lin²,

McNamara³

et al. 2015

JECTC

View full text Add to dashboard Cite

show abstract

“…It was found that the nano particles at high temperatures and pressures were enhanced to be thermally isolated from the ambient gas environment. Experimental results by Wan and Coney [19] and Kosterin and Finatev [20], showed that Taylor vortex flow exhibit high efficient flow. While, Sparrow and Chaboki [21] and Clayton and Morsi [22], confirmed that the swirl could lead to the considerable increase in the heat transfer rate.…”

Section: Introductionmentioning

confidence: 99%

Enhancement the performance of swirl heat exchanger by using vortices and NanoAluminume

Hashim

Hoshi

Al-Salihi

2019

Heliyon

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Heat exchangers are widely used in many industrial applications. It is well known that the effectiveness of these exchangers is normally measured by the amount of the heat transfer, which should be minimized as much as possible according to their size. Present study pays more attention to examine Taylor vortex which formed in the flow of the hot water of the smooth surface heat exchanger and a swirl flow of cold air. Also, an attempt was made to improve the result by replacing the heat transfer surface by Nanoaluminume metal. Experimental results revealed that the effectiveness of the exchanger at the ratio (C min /C max = 0.08) could be enhanced the effectiveness of the standard exchanger at the ratio (C min /C max = 0). Further, it was found that using nano Aluminume as a medium material for heat transfer increased the effectiveness (3.2%, 4.3% and 4.58%) for a rotational speed of inner cylinder which were used (0, 65and 80) rpm, respectively.

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“…Nevertheless, many authors have noted a pronounced preponderance of the influence of axial velocity over that of radial velocity; they include Bouafia et al [14] (a ¼ 0.5 for the rotor), and Kosterin and Finat'ev [67] (a ¼ 0.6). Gazley [6] indicated in his study a greater influence (a ¼ 0.25) but axial flow is clearly turbulent and not developed before entering the cylindrical gap.…”

Section: Influence Of Rotationmentioning

confidence: 99%

A review of heat transfer between concentric rotating cylinders with or without axial flow

Fénot

Bertin

Dorignac

et al. 2011

International Journal of Thermal Sciences

194

122

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Experimental Research of the Hydrodynamics of a Turbulent Flow of Air in the Gap Between Rotating Coaxial Cylinders

Cited by 3 publications

References 0 publications

CFD Study of Forced Air Cooling and Windage Losses in a High Speed Electric Motor

CFD Study of Forced Air Cooling and Windage Losses in a High Speed Electric Motor

Enhancement the performance of swirl heat exchanger by using vortices and NanoAluminume

A review of heat transfer between concentric rotating cylinders with or without axial flow

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