CAViDS ConsortiumCAViDS Consortium Fan Drive CFD For CAViDS Consortium Internal Use Only

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07/31/14

For CAViDS Consortium Internal Use Only

Viscous Fan Drive 3D CFD Conjugate Heat Transfer Simulation

Viscous Fan Drive 3D CFD Conjugate Heat Transfer Simulation

A CAViDS Consortium Project

WMU Team: John Bair, William Liou, Yang YangWMU Team: John Bair, William Liou, Yang YangBorgWarner: Todd Tyner, Jim Bailey, Mark OertherBorgWarner: Todd Tyner, Jim Bailey, Mark Oerther

Project Progress Project Progress

CAViDS ConsortiumCAViDS Consortium Fan Drive CFD For CAViDS Consortium Internal Use Only

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Task 1 Task 1 Use the 2013 Full 3D CFD Model to Run 4 Additional Flows to

Build Velocity Map vs. Restriction.

Objective Objective Generate a more complete understanding of the velocity

profile around the fan drive as input to the 1D model

CAViDS ConsortiumCAViDS Consortium Fan Drive CFD For CAViDS Consortium Internal Use Only

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Task 2 Task 2 Develop and Run 3D Model as Needed to Support Development of

Fin Geometry Convection Equations (1D Task 3).

Objective Objective Develop analytical basis for equations used in 1D AMESim

model of air convection (1D Tasks)

CAViDS ConsortiumCAViDS Consortium Fan Drive CFD For CAViDS Consortium Internal Use Only

Fan Drive Body

Activities Overview Activities Overview

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CAViDS ConsortiumCAViDS Consortium Fan Drive CFD For CAViDS Consortium Internal Use Only

Distribute 1D-predicted heat rejections on fluid-wetted grove surfaces Tetrahedral elements: 75,467,411 Polyhedral elements: 15,692,949 Steady state, pressure-based coupled algorithm with relative velocity

formulation Turbulent flow The fan drive body rotates at 3379 rpm fully engaged. The fan plane boundary condition uses 3379 rpm as tangential velocity

component and no radial. Mass flow inlet boundary condition, 4.9 kg/s and 366 K Pressure outlet boundary condition, 0 Pa gauge pressure Zero shear stress on all the surfaces of the chamber and the motor

stand; viscous wall for all fan drive surfaces

A Typical CFD Simulation Setup

Activities Overview Activities Overview

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CAViDS ConsortiumCAViDS Consortium Fan Drive CFD For CAViDS Consortium Internal Use Only

Air Flow Speed Around Fins (Task 1)

Task 1 – Results (orig) Task 1 – Results (orig)

Air Flow in Test Chamber Velocity Vectors on the center plane

Temperature (Task 1)Air & Body

Temperature (Task 1)Body (

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Temperature (Task 1)Body (circumferentially averaged)