This content is not included in your SAE MOBILUS subscription, or you are not logged in.
CFD Method and Simulations on a Section of a Detailed Multi-Louvered Fin Where the Incoming Air is Directed at 90° and 30° Relative to the Compact Heat-Exchanger
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 24, 2013 by SAE International in United States
Annotation ability available
This paper presents results and a Computational Fluid Dynamics (CFD) method for simulation of a detailed louvered fin for a multi-louvered compact heat-exchanger. The airflow was angled at 90°, +30° and −30° relative to the heat-exchanger to evaluate changes in static pressure drop and airflow characteristics. The investigation was based on three heat-exchangers with thicknesses of 52mm and two of 19mm. One period of a detailed louvered fin was simulated for two airflows for each heat-exchanger. The pressure drop data was thereafter compared to experimental data from a full-size heat-exchanger.
From the pressure drop and the airflow characteristic results recommendations were made that those kinds of simulations could be defined as steady state, and with the kω-SST turbulence model. For the same heat-exchanger angle the airflow within the core was similar, with a turbulent characteristic behind it. The static pressure drop was reduced significantly for the ±30° cases compared to the 90° angled heat-exchanger to approximately one third, when comparing for the same mass airflow rates. Since the test section area was defined as constant the velocity through the heat-exchanger core varied for the 90° and the 30° cases. When comparing the core velocity it was observed that there were minor losses due to the redirection of the airflow for the 30° angle compared to the 90° case. The results showed that the 30° case, where the inlet airflow was parallel to the louvers, had a higher pressure drop than the other 30° case. It was also observed that even when the inlet airflow angle varied, the outlet airflow angle from the heat-exchanger only varied 4.3-6.4°.
|Journal Article||Effect of Vortex Generator on Flow Field Quality in 3/4 Open Jet Automotive Wind Tunnel|
|Technical Paper||Gradient Effects on Drag Due to Boundary-Layer Suction in Automotive Wind Tunnels|
CitationHenriksson, L., Dahl, E., Gullberg, P., and Lofdahl, L., "CFD Method and Simulations on a Section of a Detailed Multi-Louvered Fin Where the Incoming Air is Directed at 90° and 30° Relative to the Compact Heat-Exchanger," SAE Technical Paper 2013-01-2417, 2013, https://doi.org/10.4271/2013-01-2417.
- Larsson , L. Investigation of Rear-Mounted Cooling Module Installations for Heavy Vehicles Licentiate thesis Chalmers University of Technology 2011
- Barnard , R.H. Theoretical and experimental investigation of the aerodynamic drag due to automotive cooling systems 214 ImechE 2000
- Santer , R. and Gleason , M. The Aerodynamic Development of the Probe IV Advanced Concept Vehicle SAE Technical Paper 831000 1983 10.4271/831000
- Lögdberg , O. Turbulent Boundary Layer Separation and Control PhD thesis KTH 2008
- Kim , M.H. , Youn , B. & Bullard , C.W. Effect of Inclination on the Air-Side Performance of a Brazed Aluminum Heat-Exchanger under Dry and Wet Conditions International Journal of Heat and Mass Transfer 44 4613 4623 2001
- Beamer , H. , Ghosh , D. , Bellows , K. , Huang , L. et al. Applied CFD and Experiment for Automotive Compact Heat Exchanger Development SAE Technical Paper 980426 1998 10.4271/980426
- Nichols , M.R. Investigation of Flow Through an Intercooler Set at Various Angles to the Supply Duct NACA, L-408 1942
- Rivers , D.A. , Poulter , J.E. & Lamont , P.J. Aerodynamics of Inclined Radiators on Grand Prix Cars Loughborough University of Technology UK 1994
- Stafford , S. Heat Exchanger Simulation in Wind Tunnel Models SAE Technical Paper 983039 1998 10.4271/983039
- Brotz , F. , Leininger , S. & Stauch , R. Heat Exchanger Fin Optimization with OpenFOAM using a Parametic Model Setup Opened Source CFD International Conference 2011
- Larsson , L. , Dahl , E. , Gullberg , P. , Skåre , T. , Contet , A. & Löfdahl , L. CFD Simulation and Experimental Investigation of Pressure-Drop through 90° and 30° Angled Compact Heat-Exchangers Relative to the Oncoming Airflow VTMS11 2013
- Kays , W.M. & London , A.L. Compact Heat Exchangers third McGraw-Hill 1984
- Achaichia , A. & Cowell , T.A. Flow and Heat Transfer in Compact Louvered Fin Surfaces Experimental Thermal and Fluid Science 10
- Bellows , K.D. Flow Visualization of Louvered-Fin Heat Exchangers M.S. Project University of Illinois Urbana-Champaign, Urbana, lll. 1997