This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Deployment of CFD for Optimization of the Air Flow Distribution Over the Windscreen and Prediction of Defrost Performance
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 12, 2010 by SAE International in United States
Annotation ability available
In recent times, CFD (Computational Fluid Dynamics) simulation tools have been deployed by automotive OEMs for investigating Climate Control applications. In automotive vehicles, one such critical application is designing defroster nozzles with least flow resistance to carry hot air from HVAC (Heating Ventilation and Air Conditioning) unit and dispersing it onto the windscreen and side glasses to clear mist and ice. Clearance of windscreen and side window glass has a high importance for safe driving as mist and ice formation affects driver's visibility and comfort while driving in humid and snowy conditions respectively. In the present study, a half cabin model of the vehicle is prepared using commercial software package ICEM CFD as grid generation tool and CFD analysis is carried out using commercial software package FLUENT 6.3 to optimize the air flow distribution over the windscreen and then to predict defrost performance prior to full scale climatic wind tunnel tests. Reasonable correlation is observed between CFD predictions and the available test data. Using CFD as a means to evaluate performance in early development stage helps in reduction of vehicle development time, saves associated cost of prototype parts and physical testing efforts. CFD provides a better visualization of air flows in and around the vehicle and enhances understanding of the physical tests.
|Technical Paper||After Market Portable Drag Enablers to Improve Fuel Economy of on Road Car|
|Technical Paper||Modelling and Testing of Air Flow in a HVAC Module|
|Technical Paper||Development of a Closed Loop, Full Scale Automotive Climatic Wind Tunnel|
CitationKumar, V., Tare, K., and Kapoor, S., "Deployment of CFD for Optimization of the Air Flow Distribution Over the Windscreen and Prediction of Defrost Performance," SAE Technical Paper 2010-01-1059, 2010, https://doi.org/10.4271/2010-01-1059.
- Nasr, K. J. AbdulNour, B. S. “Defrosting of Automotive Windshield: Progress and Challenges” Int. J. of Vehicle Design 23 360 375 2000
- AbdulNour, B.S. “Hot-Wire Velocity Measurements of Defroster and Windshield Flow,” SAE Technical Paper 970109 1997
- AbdulNour, B.S. “Numerical Simulation of Vehicle Defroster Flow Field,” SAE Technical Paper 980285 1998
- AbdulNour, B.S. “CFD Prediction of Automotive Windshield Defrost Pattern,” SAE Technical Paper 1999-01-1203 1999
- Kitada, M. Asano, H. Kataoka, T. Hirayama, S. et al. “Numerical Analysis of Transient Defogging Pattern on an Automobile,” SAE Technical Paper 2002-01-0223 2002
- Farag, A. Huang, L.-J. “CFD Analysis and Validation of Automotive Windshield De-Icing Simulation,” SAE Technical Paper 2003-01-1079 2003
- Park, W.G. Park, M.S. Jung, Y.R. Jang, K.L. 2005 “Numerical Study of Defrosting Phenomena of Automotive Windshield Glass” Numerical Heat Transfer, Part A: Applications 47 7 725 739
- Aroussi, A. Hassan, A. “Vehicle Side-Window Defrosting and Demisting Process” EACC 2003 1st European Automotive CFD Conference
- Roy, S. Kumar, H Anderson, R. “Efficient defrosting of an inclined flat surface” Int. J. of Heat and Mass Transfer 48 2005 2613 2624 2005
- SAE International Surface Vehicle Recommended Practice “Passenger Car Windshield Defrosting Systems,” SAE Standard J902 July 2003
- Li, M. Huang, L.J. “CFD Design Tool Improves HVAC Design and Cuts Product Development Cycle Time,” SAE Int. J. Passeng. Cars - Mech. Syst. 1 1 150 155 2008
- EEC council Directive 78/317 “Motor Vehicle Defrosting and Demisting Systems”
- Tastan, Z. Matthes, M “Windscreen Deicing of a Passenger Car” Visteon Corporation Climate Control system
- ANSYS FLUENT Users Guide ANSYS, Inc.
- ANSYS FLUENT Tutorial “Windshield De-icing Analysis” ANSYS, Inc.