Aerodynamic Design Optimization of Three Dimensional Rocket Nozzles Using Adjoint Method

2013 ◽  
Author(s):  
Sinan Eyi ◽  
Mine Yumusak
Keyword(s):  
Design Optimization ◽  
Adjoint Method ◽  
Three Dimensional ◽  
Aerodynamic Design ◽  
Aerodynamic Design Optimization

Three-Dimensional Aerodynamic Design Optimization of a Turbine Blade by Using an Adjoint Method

2009 ◽  
Author(s):  
Jiaqi Luo ◽  
Juntao Xiong ◽  
Feng Liu ◽  
Ivan McBean
Keyword(s):  
Design Optimization ◽  
Turbine Blade ◽  
Adjoint Method ◽  
Euler Method ◽  
Adjoint Equations ◽  
Design Parameters ◽  
Aerodynamic Design ◽  
Blade Profile ◽  
Profile Shape ◽  
Aerodynamic Design Optimization

This paper presents the application of an adjoint method to the aerodynamic design optimization of a turbine blade. With the adjoint method, the complete gradient information needed for optimization can be obtained by solving the governing flow equations and their corresponding adjoint equations only once, regardless of the number of design parameters. The formulations including imposition of appropriate boundary conditions for the adjoint equations of the Euler equations for turbomachinery problems are presented. Two design cases are demonstrated for a turbine cascade that involves a high tip flare, characteristic of steam turbine blading in low pressure turbines. The results demonstrate that the design optimization method is effective and the redesigned blade yielded weaker shock and compression waves in the supersonic region of the flow while satisfying the specified constraint. The relative effects of changing blade profile stagger, modifying the blade profile shape, and changing both stagger and profile shape at the same time are examined and compared. Navier-Stokes calculations are performed to confirm the performance at both the design and off-design conditions of the designed blade profile by the Euler method.

Three-Dimensional Aerodynamic Design Optimization of a Turbine Blade by Using an Adjoint Method

2010 ◽  
Vol 133 (1) ◽  
Author(s):  
Jiaqi Luo ◽  
Juntao Xiong ◽  
Feng Liu ◽  
Ivan McBean
Keyword(s):  
Design Optimization ◽  
Turbine Blade ◽  
Adjoint Method ◽  
Euler Method ◽  
Adjoint Equations ◽  
Design Parameters ◽  
Aerodynamic Design ◽  
Blade Profile ◽  
Profile Shape ◽  
Aerodynamic Design Optimization

This paper presents the application of an adjoint method to the aerodynamic design optimization of a turbine blade. With the adjoint method, the complete gradient information needed for optimization can be obtained by solving the governing flow equations and their corresponding adjoint equations only once, regardless of the number of design parameters. The formulations including imposition of appropriate boundary conditions for the adjoint equations of the Euler equations for turbomachinery problems are presented. Two design cases are demonstrated for a turbine cascade that involves a high tip flare, characteristic of steam turbine blading in low-pressure turbines. The results demonstrate that the design optimization method is effective and the redesigned blade yields weaker shock and compression waves in the supersonic region of the flow while satisfying the specified constraint. The relative effects of changing blade profile stagger, modifying the blade profile shape, and changing both stagger and profile shape at the same time are examined and compared. Navier–Stokes calculations are performed to confirm the performance at both the design and off-design conditions of the blade designed by the Euler method.

scholarly journals Numerical Investigation of an Optimized Rotor Head Fairing for the RACER Compound Helicopter in Cruise Flight

Aerospace ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 66
Author(s):  
Patrick Pölzlbauer ◽  
Andreas Kümmel ◽  
Damien Desvigne ◽  
Christian Breitsamter
Keyword(s):  
Drag Reduction ◽  
Design Optimization ◽  
Cost Effective ◽  
Aerodynamic Design ◽  
Ansys Fluent ◽  
Aerodynamic Design Optimization ◽  
Flow Phenomena ◽  
Compound Helicopter ◽  
Rotor Head ◽  
Cruise Flight

The present work is part of the Clean Sky 2 project Full-Fairing Rotor Head Aerodynamic Design Optimization (FURADO), which deals with the aerodynamic design optimization of a full-fairing rotor head for the Rapid And Cost-Effective Rotorcraft (RACER) compound helicopter. The rotor head is a major drag source and previous investigations have revealed that the application of rotor head fairings can be an effective drag reduction measure. As part of the full-fairing concept, a new blade-sleeve fairing was aerodynamically optimized for cruise flight. Within this publication, the newly developed blade-sleeve fairing is put to test on an isolated, five-bladed rotor head and compared to an already existing reference blade-sleeve fairing, which was developed at Airbus Helicopters. Numerical flow simulations are performed with ANSYS Fluent 2019 R2 considering a rotating rotor head with cyclic pitch movement. The aerodynamic forces of the isolated rotor head are analyzed to determine the performance benefit of the newly developed blade-sleeve fairing. A drag reduction of 4.7% and a lift increase of 20% are obtained in comparison to the Airbus Helicopters reference configuration. Furthermore, selected surface and flow field quantities are presented to give an overview on the occurring flow phenomena.

scholarly journals Double-stage Metamodel and Its Application in Aerodynamic Design Optimization

2011 ◽  
Vol 24 (5) ◽  
pp. 568-576 ◽  
Author(s):  
Dehu ZHANG ◽  
Zhenghong GAO ◽  
Likeng HUANG ◽  
Mingliang WANG
Keyword(s):  
Design Optimization ◽  
Aerodynamic Design ◽  
Aerodynamic Design Optimization

Practical considerations in aerodynamic design optimization

1995 ◽  
Author(s):  
W Jou ◽  
W Huffman ◽  
D Young ◽  
R Melvin ◽  
M Bieterman ◽  
...  
Keyword(s):  
Design Optimization ◽  
Aerodynamic Design ◽  
Aerodynamic Design Optimization
Sign in / Sign up

Export Citation Format

Share Document