2018/3/11 Typical Features of Aircraft Aerodynamic Design 圆上活大学 Use of CFD at Different Design Stages 国上清大学 Plays leading role in preliminary design ·Conceptual design Extemal shape determined during preliminary design ction of configurations 2-4 iterations with each taking 4-6 months ANriolselection -Starts with the definition of clean wing Wing planform wing-body or wing-body-nacelle-pylon follows Fuselage Tail sizing Key points in flight envelope ·Project design -cruise,climb,long-range cruise,cruise at high/low lift,etc. Buffett conditions with 1.3g -Both airfoil sections and wing planform parameters considered Detail design Fine-tuning of detail shapes -Minor modifications rrcn ein o oorn enin Song Role of Aerodynamic Design 圈上活文大些 Applications of CFD in Civil Aircraft Design 国上活道大坐 Aerodynamic Design Wind-Tunnel Deelgn Raynolds-Number Wind Tunnel Testing Stability and Wingand Tail Control Design Aeroelastic and Loads,Stresses fatigue and Deflections Structural Design Ref:432. Timeline of CFD methods and its applications 国圆上清发大坐 Use of CFD in aerodynamic design nA380y大￥ w品常三 15 Po E a380 Figure 3.Effect of CFDon Configunation Lines Wind Tunnel Development Testing slty-Dr.W(enbin Song Source:x265c 92018/3/11 9 © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Typical Features of Aircraft Aerodynamic Design • Plays leading role in preliminary design • External shape determined during preliminary design • 2-4 iterations with each taking 4-6 months – Starts with the definition of clean wing – wing-body or wing-body-nacelle-pylon follows – Whole aircraft simulation • Key points in flight envelope – cruise, climb, long-range cruise, cruise at high/low lift, etc. – Buffett conditions with 1.3g – Both airfoil sections and wing planform parameters considered © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Use of CFD at Different Design Stages • Conceptual design – Selection of configurations – Airfoil selection – Wing planform – Fuselage – Tail sizing • Project design – Shape design of components – Interference simulation • Detail design – Fine-tuning of detail shapes – Minor modifications © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Role of Aerodynamic Design Wind Tunnel Testing Computational Fluid Dynamics Stability and Control Wing and Tail Design Aeroelastic and fatigue Loads, Stresses, and Deflections Aerodynamic Design Structural Design © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Applications of CFD in Civil Aircraft Design Ref: 432. © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Timeline of CFD methods and its applications © Shanghai Jiao Tong University – Dr. Wenbin Song School of Aeronautics and Astronautics Use of CFD in aerodynamic design on A380 54 Source: x265c