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AMESim Heat Generation Model

CAViDS Consortium. AMESim Heat Generation Model. A CAViDS Consortium Project. Advisory Board Report October 26, 2011. CAViDS Consortium. Project Objective. Develop AMESim heat generation modeling capability for gearbox systems which compares favorably with experimental results.

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AMESim Heat Generation Model

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  1. CAViDS Consortium AMESim Heat Generation Model A CAViDS Consortium Project Advisory Board Report October 26, 2011

  2. CAViDS Consortium Project Objective • Develop AMESim heat generation modeling capability for gearbox systems which compares favorably with experimental results.

  3. CAViDS Consortium Work Plan Phase 1: Obtain software and familiarize. (Complete) Phase 2: Model and correlate churning and gear heat generation and temperature rise. 1. Caterpillar FZG test stand model (Complete) 2. Eaton heavy duty transmssion (Underway) 3. Eaton medium duty transmission (Underway) 4. Caterpillar Axle model (Underway)

  4. CAViDS Consortium Technical Status 1.Correlated AMESim temp rise model with Caterpillar Dynasty model of FZG test stand Correlated AMESim temp rise model with Eaton MDT and HDT test data Correlated Changenet based spreadsheet no load loss prediction with MDT and HDT test data Compared AMESim and Changenet churning loss predictions Compared AMESim, LDP, Benedict Kelley, ISO and other sliding loss predictions Developed approach to incorporate churning, bearing, and synchro loss models into AMESim Built model for no load losses and temp rise for Axle

  5. CAViDS Consortium Goals for Last Month • Compare more axle data • Simulate transmission temperature rise within AMESim

  6. CAViDS Consortium Last Month’s Accomplishments • Predicted heavy duty no load temperature rise with all equations within AMESim • Churning • Bearings • Synchros • Started to put in actual CD50 fluid properties into AMESim • Coordinated efforts with Eaton Co-op Student’s Senior Project • Effect of fill level

  7. CAViDS Consortium AMESim Heavy Transmission No Load Temp Rise Prediction Model

  8. CAViDS Consortium AMESim Heavy Transmission No Load Temp Rise Prediction Results

  9. CAViDS Consortium Creating CD 50 Fluid Properties in AMESim # fluid name CD50 # reference temperature (in degC) 20.0 # minimum temperature (in degC) 0.0 # maximum temperature (in degC) 110.0 # reference pressure (in PaA) 1e5 # minimum pressure (in PaA) 0.0 # maximum pressure (in PaA) 500e5 # pressure coefficient for specific volume -7.7e-10 # pressure * temperature coefficient for specific volume. 0.0 # squared pressure coefficient for specific volume.. 0.0 # pressure coefficient for absolute viscosity 0.0 # T(degC) rho(kg/m**3) cp(J/kg/degC) lam(W/m/degC) nu(m**2/s) 0 1060 4208 0.456 499e-8 10 1055 4197 0.46 314e-8 20 1049 4189 0.463 230e-8 35 1040 4181 0.468 154e-8 50 1031 4179 0.473 114e-8 70 1019 4185 0.479 82e-8 110 995 4229 0.493 47e-8 • Modify file • Format per AMESim • Select in Submodel

  10. CAViDS Consortium Effect of Fill

  11. CAViDS Consortium Next Month • Support Eaton work • Finish fluid properties work

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