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CFD Simulation for Automotive Radiator Fan
by
Lucas-TVS Ltd
Anand.M
Development Engineer
Date:06-Jun-2014
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Background
• Lucas - TVS established in 1961 as a joint venture between Lucas UK and T
V Sundram Iyengar & Sons (TVS), India to manufacture Automotive Electrical
Systems. Lucas-TVS is the Leader in Auto Electricals in India today with 50
years experience in design and manufacturing.
• Lucas - TVS is a TS16949 and OHSAS 18001 certified company. Lucas-TVS
has bagged the Deming application price in 2004 from the Japanese Union of
Scientists and Engineers (JUSE).Lucas-TVS is awarded Deming Grand
Price(DGP) in 2012 for excellence in applying the principles of Total Quality
Management(TQM) from JUSE.
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CFD analysis for Automotive Radiator Fan
Objective of case study
• To perform CFD analysis of automotive radiator
fan and establish correlation with the
experimental data.
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FAN-SHROUD ASSEMBLY
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Test Setup and condition
Air Flow Chamber
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Fan geometry and Domains
Fan
Inlet Domain
Outlet Domain
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Problem setup
•For the steady RANS simulations, the single equation Spalart-Allmaras
(SA) turbulence model was used.
•The turbulence equation is solved segregated from the flow equations
using the GLS formulation.
•Reference Frame is used to simulate the Rotating Flow
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Boundary Conditions
Inlet – Mass Flow inlet
Outlet – Pressure Outlet
Fan –Reference Frame
All other surfaces are No-Slip wall BC
Air In
Air Out
Mass Flux at
Inflow Surface
Pressure
at Outflow
Surface
Fan Speed(3457 RPM)
0 Pa
0.8634 Kg/s
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Mesh-Cut Plan View
Number of Elements = 7724386
Number of Boundary Layer = 6
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Results
Pressure - 224.455 Pa
Pressure Vs. Time
At Convergence
Pressure at
inlet surface
Pressure Vs. Time
Eddy viscosity
Pressure
Velocity
Residual ratio
Vs. Time
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Result - Cont..
Pressure
Wall distance (Y+ )
Velocity
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Result – Streamlines
Case-1
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Result & Discussion - Correlation
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Conclusion
• Acusolve could predict the pressure drop for given mass
flow rate of an automotive radiator fan(370 mm frame)
with >90 % accuracy.
• LucasTVS proposes to use this approach to optimize
radiator fans to enhance the fan efficiency.
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Q&A
Thanks !
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