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Local Aerothermal Optimization Method Based on Discrete Adjoint.

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Title: Local Aerothermal Optimization Method Based on Discrete Adjoint.
Authors: Bo Qiu1,2, Qing Han Sun1, Hao Yuan Zhang3, Yan Dan Zhu4, Xiao Feng Yang3, Qun Chen5
Source: AIAA Journal. Nov2025, Vol. 63 Issue 11, p4836-4850. 15p.
Abstract: Optimal aerothermal shape design benefits performance improvement in hypersonic aircraft, where discrete adjoint-based optimization has superiority. However, it faces several challenges, including derivation of the coefficient matrix, solution of adjoint equations, and deformation of structured grids. This article introduces a differential seed lattice traversing technique to deduce the coefficient matrix explicitly, proposes a Block-LUSGS time-marching method to improve the efficiency of adjoint equations solution, and develops a large local deformation technique for structured grids. Specifically, the proposed optimization method employs the steepest descent technique to determine the optimization direction and the golden ratio method to calculate the optimization step size. Optimization of a sphere flat plate gives an 11.8% reduction in peak heat flux, consistent with expectations. Optimization of a compression corner has a 30.4% reduction in peak heat flux, exceeding expectations. These examples validate the effectiveness of the newly proposed optimization method, showing its significant potential for broader applications. [ABSTRACT FROM AUTHOR]
Copyright of AIAA Journal is the property of American Institute of Aeronautics & Astronautics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 189622493
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Local Aerothermal Optimization Method Based on Discrete Adjoint.
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  Data: <searchLink fieldCode="AR" term="%22Bo+Qiu%22">Bo Qiu</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Qing+Han+Sun%22">Qing Han Sun</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hao+Yuan+Zhang%22">Hao Yuan Zhang</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Yan+Dan+Zhu%22">Yan Dan Zhu</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Xiao+Feng+Yang%22">Xiao Feng Yang</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Qun+Chen%22">Qun Chen</searchLink><relatesTo>5</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22AIAA+Journal%22">AIAA Journal</searchLink>. Nov2025, Vol. 63 Issue 11, p4836-4850. 15p.
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Optimal aerothermal shape design benefits performance improvement in hypersonic aircraft, where discrete adjoint-based optimization has superiority. However, it faces several challenges, including derivation of the coefficient matrix, solution of adjoint equations, and deformation of structured grids. This article introduces a differential seed lattice traversing technique to deduce the coefficient matrix explicitly, proposes a Block-LUSGS time-marching method to improve the efficiency of adjoint equations solution, and develops a large local deformation technique for structured grids. Specifically, the proposed optimization method employs the steepest descent technique to determine the optimization direction and the golden ratio method to calculate the optimization step size. Optimization of a sphere flat plate gives an 11.8% reduction in peak heat flux, consistent with expectations. Optimization of a compression corner has a 30.4% reduction in peak heat flux, exceeding expectations. These examples validate the effectiveness of the newly proposed optimization method, showing its significant potential for broader applications. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of AIAA Journal is the property of American Institute of Aeronautics & Astronautics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.2514/1.J065267
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      – Code: eng
        Text: English
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      – TitleFull: Local Aerothermal Optimization Method Based on Discrete Adjoint.
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            NameFull: Qing Han Sun
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            NameFull: Hao Yuan Zhang
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            NameFull: Yan Dan Zhu
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            NameFull: Xiao Feng Yang
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              M: 11
              Text: Nov2025
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              Y: 2025
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