《powerflow空气动力学教程.ppt

Exa Corporation Confidential External AerodynamicsCabin Optimization (late Pre-SOP) Why PowerFLOW was chosen/used Traditional WT testing high effort and too late in process DNW Windtunnel ~250k€ per week + MAN mandays + logistics Objectives Select best possible Deflector shape Cover the tractor/trailor gap best Get best-in-class TGA truck Impact Multiple deflector variants Drag reduced by 30 counts Kambiz Salari, et al DOE Heavy Vehicle Systems ReviewApril 18-20, 2006 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Exa Corporation Confidential External AerodynamicsCabin Optimization (late Pre-SOP) Savings and benefits → 5% Fuel Savings Saving 1: Fuel 35 l/100km 150.000 km / p.a. ~ 52.500 l 5% = 2.625 l ~ 3.000 € p.a. 3.000,-€ * 7 years = ~ 21.000 € total Saving 2: Time 800 l / fuel tank ~ 2.200-2.400 km 3-4 stops refuels p.a. + extended range ~100km Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Motivation Tyres with extra lowrolling resistance 3-5% Electronicallycontrolled cooling fan 0.5-1.2 % Side air deflectors 0.2% Revised air conditioning 0.5 % Improved air pressure supply 0.5-1.0 % Front underrun protection (FUP) 0.2 % Modified retarder 0.5% Roof air deflector for high bodywork 3% Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. ? Exa Corporation Confidential * ? Exa Corporation Confidential * ? Exa Corporation Confidential ? Exa Corporation Confidential ? Exa Corporation Confidential ? Exa Corporation Confidential ? Exa Corporation Confidential Exa Corporation Confidential ? Exa Corporation Confidential * ? Exa Corporation Confidential * ? Exa Corporation Confidential * ? Exa Corporation Confidential * ? Exa Corporation Confidential * ? Exa Corporation Confidential * ? Exa Corporation Confidential * R 79 G 129 B 189 R 237 G 27 B46 R 26 G