Progress in Vehicle Aerodynamics and Thermal Management 11th FKFS Conference Stuttgart September 26 27 2017 1st Edition by Jochen Wiedemann 3319678213 9783319678214

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ISBN-10 : 3319678213 

ISBN-13 : 9783319678214

Author:  Jochen Wiedemann 

The books presents latest information about new car developments, new or improved testing techniques and new or improved calculation procedures. Presenters are from industry and academia.

Progress in Vehicle Aerodynamics and Thermal Management 11th FKFS Conference Stuttgart September 26 27 2017 1st Table of contents:

A Coupled Simulation Approach to Race Track Brake Cooling for a GT3 Race Car
Abstract
1 Introduction
2 Set-up
2.1 Set-up Experiment
2.2 Set-up Simulation
3 Validation Results
4 Design Optimization
5 Future Work
6 Conclusions
References
A New Process to Evaluate the Risk of an Engine Power Drop Caused by Snow Particles
Abstract
1 Introduction
2 Traditional Possibilities to Evaluate the Risk of a Power Drop
2.1 Testing Area in Arjeplog
2.2 Climatic Wind Tunnels
2.2.1 Climatic Wind Tunnel in Sindelfingen
2.2.2 Climatic Wind Tunnel in Stuttgart
3 Simulation Approach to Calculate the Snow Ingress
3.1 Drag Force
3.2 Wall-Impact Behavior
4 Comparison Between Simulation Results and Measurements
4.1 Simulation Set-up
4.2 Results
5 Conclusion
References
Cooling Air Flow
Introduction of a New Full-Scale Open Cooling Version of the DrivAer Generic Car Model
Abstract
1 Introduction
2 Development of the Open Cooling DrivAer Model
2.1 Background
2.2 The Baseline Open Cooling DrivAer Model
2.3 Variability of the Ford Open Cooling DrivAer Model – Beyond Aerodynamics
2.4 Instrumentation of the Ford Open Cooling DrivAer Model
3 Physical Models
3.1 The Ford 1:1 Scale Open Cooling DrivAer Model
3.2 The TUM 1:2.5 Scale Open Cooling DrivAer Model
3.3 The FKFS 1:4 Scale Open Cooling DrivAer Model
4 Experimental Results
4.1 Ford 1:1 Scale Open Cooling DrivAer
4.2 Cooling Airflow Drag
4.3 Comparison to Original Closed Cooling DrivAer
4.4 Comparison Between Scale and Full Scale Models
5 Open Cooling DrivAer Data Sharing
6 Summary
7 Future Work
Appendix
References
An Experimental Investigation into the Flow Mechanisms Around an SUV in Open and Closed Cooling Air
Abstract
1 Introduction
2 Test Set-up
2.1 Test Vehicle
2.2 Test Configurations
2.3 FKFS AAWT
2.4 Measurement Equipment
2.5 Flow Measurement Locations
2.6 Measurement Methodology
3 Results and Analysis
3.1 Initial Observations
3.2 Traverse Influence
3.3 Effect of Ride Height Change and Removal of Wheels
3.4 Influence of Static/Rotating Wheels on Cooling Drag
3.4.1 Surface Pressure Analysis
Base Pressure
Body-Side Pressures
Rear Wheel Deflector Pressures
3.4.2 Flow-Field Survey Data
Base Wake Analysis
Front Wheel Wake Analysis
3.4.3 Cooling Drag Mechanism Hypothesis
4 Summary and Conclusions
Acknowledgements
Appendix
References
Unsteady Flow
Evaluation of Unsteady Flow Phenomena Induced by the Tailgate Gap of a Production Car Using Simulati
Abstract
1 Introduction
2 Numerical Method
3 Test Facility and Measurement Tools
4 Test Case Setup
5 Results and Evaluation
6 Summary
7 Conclusion
Acknowledgments
References
Characterisation of Wake Bi-stability for a Square-Back Geometry with Rotating Wheels
Abstract
1 Introduction
2 Experimental Methodology
2.1 The Windsor Body
2.2 The Wind Tunnel
2.3 Balance Measurements
2.4 Pressure Measurements
2.5 PIV Measurements
3 Results and Discussion
3.1 Square-Back Configuration: Effects of the Wheels on the RSB Mode
3.2 Effects Produced by Horizontal Trailing Edge Tapers on the RSB Mode
3.3 Effects Produced by Vertical Trailing Edge Tapers on the RSB Mode
3.4 Effects of the RSB Mode on the Side Force
4 Summary and Conclusions
Acknowledgements
References
Investigation of Time-Resolved Nozzle Interference Effects
Abstract
1 Introduction
2 Fundamentals
2.1 Fluid Mechanics
2.2 Wind Tunnel Effects
2.3 Mode Decomposition
2.4 Measurement and Simulation Methods
2.4.1 PIV
2.4.2 Multi-hole Cobra Probe Measurements
3 Results
3.1 Time-Averaged Results
3.2 Time-Resolved Results
3.2.1 Cobra Investigations
3.2.2 PIV Investigations
3.2.3 POD Analysis
4 Conclusions and Outlook
Acknowledgements
Acknowledgements
References
New Vehicles
Mercedes-AMG GTR: Aerodynamics for the Record
Abstract
1 About the Mercedes-AMG GT
2 Aerodynamics
3 The Front End
3.1 All-New Active Aerodynamics Profile in the Underbody
3.2 Louvres Control the Airflow: The Active Air Management System
4 Emphasis on Width and Aerodynamic Optimization: The Rear End
4.1 Diffuser
4.2 The Rear Wing
5 The Result: Some Aerodynamic Values
The Aerodynamics Development of the New Land Rover Discovery 5
Abstract
1 Introduction
2 Aerodynamic Development Process
2.1 Early Design Characterisation
2.2 Delivery Phase
2.2.1 Air Curtains
2.2.2 Under-Floor
2.2.3 Slotted Roof Spoiler
2.2.4 Eco-Wheel
2.2.5 Active Devices
2.3 Validation and Correlation
3 Summary
Acknowledgements
References
The Aerodynamics Development of the New Volkswagen Polo
Abstract
1 Introduction of the New Polo
1.1 Evolution from Predecessor
1.2 Interior Dimensions
2 Development of Platform and Car Body
2.1 Platform
2.1.1 Facilities Used for Development/Cooperation with Audi
2.1.2 Underbody Concept
2.1.3 Underbody Details
2.2 Upper Body
2.2.1 Layout Framework
2.2.2 Geometric Details
3 Whole Vehicle
3.1 Sensitivity to Ground Simulation
3.2 Fleet-Wide Drag Reduction
3.3 Aerodynamic Properties
4 Conclusions
On-Road Tests
Aerodynamic Development of a New Coach Generation Based on Wind Tunnel Testing, CFD-Simulation and O
Abstract
1 MAN Truck & Bus AG Welcomes a New, Very Efficient Member to the Family with the NEOPLAN Tourliner
2 Economy and Efficiency Through Aerodynamic Exterior Design
3 Wind Tunnel Measurements
4 Constant Speed Tests
5 Even More Efficiency
Reference
An Experimental Study of the Underbody Flow of a VW Golf VII Under On-Road and Wind-Tunnel Condition
1 Introduction
1.1 Objective of This Study
1.2 Procedure
2 Experimental Setup
2.1 Test Vehicle
2.2 Vehicle Configurations
2.3 Vehicle Instrumentation
2.4 Measurement Techniques
2.4.1 Particle Image Velocimetry
2.4.2 Pressure Measurement System
2.4.3 Ground Clearance Measurement System
2.5 Road Test
2.5.1 Test Track
2.5.2 Stationary Measurement Systems
2.5.3 Test Procedure
2.6 Wind Tunnel Experiment
2.6.1 Test Facility
2.6.2 Wind Tunnel Setup
3 Experimental Results
3.1 Results of the Wind Tunnel Experiments
3.2 Comparison of Wind Tunnel Experiment, Road Test and CFD
4 Conclusions
Reference
Some Aspects on On-Road Aerodynamics
Abstract
1 Introduction
2 CFD Method
3 Analysis of Slipstream
4 Effects of Cornering
5 Natural Wind Effects
Acknowledgement
References
Aerodynamic Development
On the Influence of Underhood Flow on External Aerodynamics of the DrivAer Model
Abstract
1 Introduction
2 Experimental Approach
2.1 The 40% Scaled DrivAer Model in Underhood Flow Configuration
2.2 Experimental Setup
2.3 Experimental Results
2.3.1 DrivAer in Mock-Up Configuration
2.3.2 DrivAer with Underhood Flow
3 Numerical Approach
3.1 Numerical Setup
3.2 Numerical Results
4 Conclusions
References
Potential of Porsche Reference Cars for Aerodynamic Development
Abstract
1 Introduction
2 Overview of the Reference Cars
2.1 Pressure Sensors on the Vehicle and Vehicle Calibration
2.2 Vehicle Velocity
2.3 Vehicle Ride Height
2.4 Temperature
3 Overview of the Main Results Measured on the Road Tests and in Various State-of-the-Art Wind Tunne
3.1 Main Wind Tunnel Effects
3.2 Wind Tunnel Velocity and Aerodynamic Coefficients
4 Final Tuning of the New Porsche Wind Tunnel
5 Comparison, 5 Belts to 1 Belt System
6 Delta Car-Configurations in Different Wind Tunnels
7 Ventilation Drag in the New Porsche Wind Tunnel
8 Wind Tunnel vs. Coast-Down
9 Conclusions
Acknowledgement
References
Methodical Investigation of Vehicle Side Glass Soiling Phenomena
Abstract
1 Introduction
2 Soiling Process and Evaluation Method
3 Phenomena of Vehicle Side Glass Soiling
4 Influence of Contact Angle on Vehicle Side Glass Soiling
5 Conclusion and Outlook
References
Design and First Test of the New Synchronous 200 Hz System for Unsteady Pressure Field Measurement
Abstract
1 Concept
2 Characteristics
2.1 Topology
2.2 Strips
2.3 Central Unit
2.4 Sensors
3 Measurement System
4 System Validation
4.1 Experimental Setup
4.1.1 Dynamic Pressure Test Stand
4.1.2 The Model Scale Wind Tunnel of University of Stuttgart
4.2 Validation Results
4.2.1 Test Stand Validation
4.2.2 Wind Tunnel Validation
5 Conclusions

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