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Technical Briefs

Investigations on CFD Simulations for Predicting Windage Power Losses in Spur Gears

[+] Author and Article Information
Y. Marchesse

Laboratoire d’Energétique, ECAM Lyon, Université de Lyon, 69005 Lyon, Franceyann.marchesse@ecam.fr

C. Changenet

Laboratoire d’Energétique, ECAM Lyon, Université de Lyon, 69005 Lyon, Francechristophe.changenet@ecam.fr

F. Ville

CNRS, INSA-Lyon, Université de Lyon, LaMCoS UMR5259, 69621 Villeurbanne, Francefabrice.ville@insa-lyon.fr

P. Velex

CNRS, INSA-Lyon, Université de Lyon, LaMCoS UMR5259, 69621 Villeurbanne, Francephilippe.velex@insa-lyon.fr

J. Mech. Des 133(2), 024501 (Feb 01, 2011) (7 pages) doi:10.1115/1.4003357 History: Received February 03, 2010; Revised October 19, 2010; Published February 01, 2011; Online February 01, 2011

In this paper, a computational fluid dynamics (CFD) code is applied to two- and three-dimensional simulations of windage power loss generated by spur gears rotating in air. Emphasis is placed on the various meshes associated with the finite volume method and on the choice of turbulence model. Comparing CFD predictions with the power losses measured on a specific test rig, it is shown that the fluid ejection in the radial direction must be included in order to reproduce the experimental evidence. The relative importance of the losses generated by the gear front and rear faces along with those due to the teeth is discussed. The volumetric flow rate expelled by the teeth is analyzed and the influence of flanges is highlighted.

Copyright © 2011 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Schematic representation of the test rig

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Figure 2

(a) 2D computational domain for flow analysis and (b) example of structured mesh

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Figure 3

Velocity vector distribution at 10,000 rpm

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Figure 4

Pressure distribution at 10,000 rpm: (a) SST k-ω model and (b) RNG k-ε model

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Figure 5

2D numerical WPL generated by the teeth (module=1 mm)

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Figure 6

2D numerical WPL (gear 1)

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Figure 7

3D computational domain

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Figure 8

3D flow pattern (gear 1 at 700 rad/s using SST k-ω and M3 mesh)

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Figure 9

Influence of rotational speed on total volumetric flow rate using SST k-ω and M3 mesh

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Figure 10

Outlet-area section and width

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Figure 11

Outlet volumetric flow rate evolution versus outlet-area width when ω=700 rad/s using SST k-ω and M3 mesh

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Figure 12

Experimental and 3D numerical WPL (gear 1)

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Figure 13

Experimental and 3D numerical WPL (gear 3)

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Figure 14

Experimental and 3D numerical WPL (gear 2)

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Figure 15

WPL contribution of teeth and faces using SST k-ω and M3 mesh (gear 1)

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Figure 16

Influence of axial clearance on WPL using SST k-ω and M4 mesh (gear 1)

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Figure 17

Influence of axial clearance on mass flow rate passing through gear tooth region using SST k-ω and M4 mesh (gear 1)

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Figure 18

Influence of axial clearance on gear side contribution to total power loss using SST k-ω and M4 mesh (gear 1)

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