Development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design method
The inverse design is one of the aerodynamic design methods, in which the pressure distribution along the wall is known, and the duct geometry is unknown. To obtain the best geometry by the inverse design, the target pressure distribution along the walls should be optimum. This paper presents an aer...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2021-06-01
|
Series: | Alexandria Engineering Journal |
Subjects: | |
Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016821000375 |
id |
doaj-bbdd4706de284b05986a30c24b4e3ab0 |
---|---|
record_format |
Article |
spelling |
doaj-bbdd4706de284b05986a30c24b4e3ab02021-06-02T20:36:06ZengElsevierAlexandria Engineering Journal1110-01682021-06-0160330213036Development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design methodMahdi Nili-Ahmadabadi0Farzad Aghabozorgi1Dae-Seung Cho2Kyung Chun Kim3Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 8415683111, Iran; Corresponding authors.Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 8415683111, IranDepartment of Naval Architecture and Ocean Engineering, Pusan National University, Busan 46241, Republic of KoreaSchool of Mechanical Engineering, Pusan National University, Busan 46241, Republic of Korea; Corresponding authors.The inverse design is one of the aerodynamic design methods, in which the pressure distribution along the wall is known, and the duct geometry is unknown. To obtain the best geometry by the inverse design, the target pressure distribution along the walls should be optimum. This paper presents an aerodynamic design of diffusers by optimizing the wall pressure distribution and applying it to the ball-spine inverse design method. A code was first developed to solve the boundary layer equations using the integration method, and then incorporated into a genetic algorithm to optimize the wall pressure distribution to achieve the maximum pressure recovery without separation occurrence. Depending on the type of the duct, a series of constraints was applied to the wall pressure distributions during the optimization process. The optimized pressure distribution was considered as the target pressure distribution for the inverse design problem. The duct geometry changes during the inverse design process to reach one satisfying the target pressure distribution. An offline connection was observed between the ball-spine inverse design method and the genetic algorithm. The boundary layer code was the medium for this offline connection. The optimized wall pressure distribution and inverse design process were evaluated for a straight diffuser and three S-shaped diffusers with different height to length ratios. The results revealed the robustness of the offline link of the inverse design and the genetic algorithm for the optimal aerodynamic design of ducts.http://www.sciencedirect.com/science/article/pii/S1110016821000375Optimal aerodynamic designS-shaped diffuserBall-spine inverse design methodBoundary layer equationsGenetic algorithm |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mahdi Nili-Ahmadabadi Farzad Aghabozorgi Dae-Seung Cho Kyung Chun Kim |
spellingShingle |
Mahdi Nili-Ahmadabadi Farzad Aghabozorgi Dae-Seung Cho Kyung Chun Kim Development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design method Alexandria Engineering Journal Optimal aerodynamic design S-shaped diffuser Ball-spine inverse design method Boundary layer equations Genetic algorithm |
author_facet |
Mahdi Nili-Ahmadabadi Farzad Aghabozorgi Dae-Seung Cho Kyung Chun Kim |
author_sort |
Mahdi Nili-Ahmadabadi |
title |
Development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design method |
title_short |
Development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design method |
title_full |
Development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design method |
title_fullStr |
Development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design method |
title_full_unstemmed |
Development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design method |
title_sort |
development and validation of a hybrid aerodynamic design method for curved diffusers using genetic algorithm and ball-spine inverse design method |
publisher |
Elsevier |
series |
Alexandria Engineering Journal |
issn |
1110-0168 |
publishDate |
2021-06-01 |
description |
The inverse design is one of the aerodynamic design methods, in which the pressure distribution along the wall is known, and the duct geometry is unknown. To obtain the best geometry by the inverse design, the target pressure distribution along the walls should be optimum. This paper presents an aerodynamic design of diffusers by optimizing the wall pressure distribution and applying it to the ball-spine inverse design method. A code was first developed to solve the boundary layer equations using the integration method, and then incorporated into a genetic algorithm to optimize the wall pressure distribution to achieve the maximum pressure recovery without separation occurrence. Depending on the type of the duct, a series of constraints was applied to the wall pressure distributions during the optimization process. The optimized pressure distribution was considered as the target pressure distribution for the inverse design problem. The duct geometry changes during the inverse design process to reach one satisfying the target pressure distribution. An offline connection was observed between the ball-spine inverse design method and the genetic algorithm. The boundary layer code was the medium for this offline connection. The optimized wall pressure distribution and inverse design process were evaluated for a straight diffuser and three S-shaped diffusers with different height to length ratios. The results revealed the robustness of the offline link of the inverse design and the genetic algorithm for the optimal aerodynamic design of ducts. |
topic |
Optimal aerodynamic design S-shaped diffuser Ball-spine inverse design method Boundary layer equations Genetic algorithm |
url |
http://www.sciencedirect.com/science/article/pii/S1110016821000375 |
work_keys_str_mv |
AT mahdiniliahmadabadi developmentandvalidationofahybridaerodynamicdesignmethodforcurveddiffusersusinggeneticalgorithmandballspineinversedesignmethod AT farzadaghabozorgi developmentandvalidationofahybridaerodynamicdesignmethodforcurveddiffusersusinggeneticalgorithmandballspineinversedesignmethod AT daeseungcho developmentandvalidationofahybridaerodynamicdesignmethodforcurveddiffusersusinggeneticalgorithmandballspineinversedesignmethod AT kyungchunkim developmentandvalidationofahybridaerodynamicdesignmethodforcurveddiffusersusinggeneticalgorithmandballspineinversedesignmethod |
_version_ |
1721400975637348352 |