声明
ABSTRACT
摘要
TABLE OF CONTENTS
LIST OF FIGURES
LIST OF TABLES
CHAPTER 1 INTRODUCTION
1．1 Background
1．2 The Open-wheel Race Car Aerodynamic Development
1．2 The Open-wheel Race Car Aerodynamic Development
1．3 Methods study of open-wheel race car
1．3．1 Experimental method
1．3．2 Numerical method
1．4 The main technical of open-wheel race car aerodynamics
1．5 Objectives of This Investigation
1．6 Thesis Structure
Chapter 2 THEORETICLE FOUNDATION OF OPENWHEEL RACE CAR AERODYNAMICS
2．1 Aerodynamics characteristic of open-wheel race car
2．2 Aerodynamic Coefficients
2．2．1 Drag Coefficient
2．2．2 Lift Coefficient
2．2．3 Side Coefficient
2．2．4 Pressure Coefficient
2．3 Wings effect
2．3．1 Front wing
2．3．2 Rear wing
2．4 Wheel effect
2．5 Ground Effect
2．6 Summary
Chapter 3 MODEL CREATION AND RESEARCH METHODOLOGY
3．1 Description of CAD Model Geometries
3．2 Numerical Methods and Turbulence Modeling
3．2．1 RANS turbulence model
3．2．2 Large Eddy Simulation(LES)
3．2．3 Direct numerical simulation(DNS)
3．2．4 MRF-Multiple Reference Frame Method
3．3 Wall treatments
3．4 Experimental Method
3．4．1 Wind Tunnel Test
3．4．2 LDA(Laser Doppler Anemometer)
3．4．3 PIV(Particle Image Velocimetry)
3．5 Wind Tunnel Errors
3．6 Summary
Chapter 4 EXPERIMENTAL INVESTIGATION OF THE FLOW FIELD AROUND OPEN-WHEEL RACE CAR
4．1 Hunan University HD-2 wind tunnel
4．2 Instrumentation and Measurement Techniques
4．2．1 Balance system
4．2．2 Pressure measurement system
4．2．3 Velocity measurement system
4．2．4 Suction system
4．2．5 Particle Image Velocimetry(PIV)
4．3 The effect of ground boundary layer on the result of measurement and modify
4．4 Wind tunnel setup
4．5 Results
4．5．1 The suction system close
4．5．2 The suction system open
4．5．3 Flow structure at the plane Y=0 of open-wheel race car rear wing
4．6 Summary
Chapter 5 NUMERICAL SIMULATION OF THE AERODYNAMIC CHARACTERISTICSAROUND OPEN-WHEEL RACE CAR IN CASES：STATIONARY AND ROTATING WHEELS
5．1 Introduction
5．2 Ansys Icem and Fluent
5．3 Simulation process the flow field of Open-wheel Race car
5．4 Computation setup
5．4．1 Race car geometrical parameters
5．4．2 Computation domain
5．4．3 Governing equations and diseretization
5．4．4 The MRF method
5．4．5 Convergence criteria and validation
5．4．6 Turbulence Modelling
5．4．7 Mesh generation and grid independence test
5．4．8 The boundary conditions
5．5．Results
5．5．1 Pressure distribution on wheel of race car
5．5．2 Pressure distribution around race car
5．5．3 Pressure distribution on front and rear wing
5．5．4 Flow characteristics around the wheel of the race car
5．5．5 Flow characteristics around the race car
5．5．6 Flow characteristics around front-rear wing of race car
5．6 Summary
Chapter 6 OPTIMIZATION OPEN-WHEEL RACE CAR REAR WING
6．1 Introduction
6．2 The aerodynamic optimization method based on approximation model method
6．2．1 Design of Experiment
6．2．2 The approximate model
6．2．3 The optimization algorithm selection
6．2．4 The process of the aerodynamic forces optimization based on the approximate model
6．3 Open-wheel race car rear wing optimization
6．3．1 Aerodynamic of airfoils
6．3．2 The rear wing geometric model
6．3．3 Numerical simulation and establishment approximate model
6．3．4 Objective and constraint functions
6．4 Optimization result
6．4．1 Test result by numerical simulation method
6．4．2 Test result by experimental method
6．5 Summary
Chapter 7 AERODYNAMIC CHARACTERISTICS OF OPEN-WHEEL RACE CAR IN TURN A CORNER
7．1 Introduction User-defined funotion(UDF)
7．1．1 Introduction
7．1．2 UDF functions
7．1．3 UDF code
7．2 The Process of numerical simulation
7．2．1 Computation domain
7．2．2 Mesh generation
7．2．3 The boundary conditions
7．3 Results
7．3．1 Velocity distribution around open-wheel of race car
7．3．2 Pressure distribution around open-wheel of race car
7．4 Summary
CONCLUSION AND FUTURE WORK
REFERENCES
APPENDIX
ACKNOWLEDGEMENTS
