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AMESim Fan Drive Thermal Model

CAViDS Consortium. AMESim Fan Drive Thermal Model. A CAViDS Consortium Project. Advisory Committee Report April 11, 2013. CAViDS Consortium. Project Objective.

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AMESim Fan Drive Thermal Model

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  1. CAViDS Consortium AMESim Fan Drive Thermal Model A CAViDS Consortium Project Advisory Committee Report April 11, 2013

  2. CAViDS Consortium Project Objective Develop heat generation modeling capability for Model 662B viscous fan drive to predict temperature rise for general operating conditions. This model will be used in conjunction with CFD modeling to determine enhanced design for higher heat rejection from the drive. Higher heat rejection will allow longer operation at fan drive speeds that allow optimal vehicle operation.

  3. CAViDS Consortium Work Plan 1. Develop AMESim thermal model based on heat flow predictions from previous modeling, within AMESim and from available literature Compare temp rise measurements with AMESim predictions Determine predicted heat flow throughout drive for these operating conditions

  4. CAViDS Consortium AMESim Thermal Model

  5. CAViDS Consortium AMESim Thermal Model • Used proven simple transmission based basic approach for fluid convection, bearing and linear conduction, and radiation • Used external convection-to-air equations based on technical paper (Nusselt number = 0.019 * Re ^0.8) (Changed coefficient to 0.035) • Developed new sub-models for fluid convection to link heat transfer equations to instantaneous fluid properties and speed variation • Developed new sub-models for air convection based on variable drive speed as input to convection equations • Input silicon fluid properties in table as fluid reference • Used rib spacing (7mm) as critical dimension for Reynolds number for air convection from body • Used 13 mm as critical dimension for Reynolds number for fluid convection to body and clutch. This has yet to be justified.

  6. CAViDS Consortium Latest Temp Rise Prediction Results

  7. CAViDS Consortium Latest Temp Rise Prediction Results

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