CFD-Based Shape Optimization of Hypersonic Vehicles Considering Transonic Aerodynamic Performance

2008 ◽  
Author(s):  
Atsushi Ueno ◽  
Kojiro Suzuki
Keyword(s):  
Shape Optimization ◽  
Aerodynamic Performance ◽  
Hypersonic Vehicles

Modification impact on aerodynamic performance of hypersonic waverider

2011 ◽  
Vol 115 (1168) ◽  
pp. 325-334 ◽  
Author(s):  
C. Xiao-Qing ◽  
H. Zhong-Xi ◽  
L. Jian-Xia ◽  
G. Xian-Zhong
Keyword(s):  
Leading Edge ◽  
Aerodynamic Performance ◽  
Hypersonic Vehicles ◽  
Flow Conditions ◽  
Aerodynamic Coefficient ◽  
High Lift ◽  
Computational Fluid Dynamics Cfd ◽  
Drag Ratio ◽  
Lift To Drag Ratio ◽  
Sharp Leading Edge

Abstract Waverider serves as a good candidate for hypersonic vehicles. The typical waverider has sharp leading edge and no control face, which is inappropriate for practical use. This paper puts forward a method modifying the waverider, and the modification impact on the performance of waverider at hypersonic flow conditions is studied. The modification is based on blunted waverider, includes cutting the tip and introducing two control wings. The modification’s effect on aerodynamic performance is obtained and analysed through Computational Fluid Dynamics (CFD) techniques. When blunted with 2cm radius, the waverider retains its good aerodynamic performance and the heat flux at the stagnation point can be managed. Three factors of the introduced wing are argued, the fixed angle, aspect ratio and wing area. Results show that influence on the aerodynamic coefficient is slight and the vehicle retains its high lift-to-drag ratio. The main influences of the modification are the control ability and trim efficiency, which is the motivation of this work and can be adapted when designing a practical waverider.

scholarly journals Optimal Aerodynamic Shape Optimization of a Paraglider Airfoil Based on the Sharknose Concept

2018 ◽  
Vol 221 ◽  
pp. 05002
Author(s):  
Amir A. Abdelqodus ◽  
Innokentiy A. Kursakov
Keyword(s):  
Shape Optimization ◽  
Stokes Equations ◽  
Pressure Coefficient ◽  
Aerodynamic Performance ◽  
Navier Stokes ◽  
Aerodynamic Shape Optimization ◽  
Aerodynamic Shape ◽  
Air Inlet ◽  
Gradient Based ◽  
Lift And Drag

The effects of classical air inlet configurations on the aerodynamic performance of a paraglider airfoil are firstly presented. Followed by conducting gradient-based aerodynamic shape optimization of the baseline airfoil used in the investigation of the classical air inlets. Different air inlet configurations are introduced to the optimized profile, and there effects on the aerodynamic performance are then compared to the initial and optimized airfoils. The Reynolds averaged Navier-Stokes equations (RANS) are solved for the flow field around the closed and open airfoils. The canopy is assumed to be smooth, rigid and impermeable. Results are focused on both of lift and drag coefficients for performance analysis and on the internal pressure coefficient which can be critical for a real flexible wing regarding the risk of collapse.

Aerodynamic performance improvement of wind turbine blade by cavity shape optimization

2019 ◽  
Vol 132 ◽  
pp. 773-785 ◽  
Author(s):  
Mostafa Fatehi ◽  
Mahdi Nili-Ahmadabadi ◽  
Omid Nematollahi ◽  
Ali Minaiean ◽  
Kyung Chun Kim
Keyword(s):  
Shape Optimization ◽  
Wind Turbine ◽  
Performance Improvement ◽  
Turbine Blade ◽  
Aerodynamic Performance ◽  
Wind Turbine Blade ◽  
Cavity Shape
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