Multiobjective Optimization of Double-Wall Cooling Structure of Integrated Strut Flame Stabilizer and Sensitivity Analysis of Parameters
Publication: Journal of Aerospace Engineering
Volume 36, Issue 5
Abstract
The thermal environment behind the integrated strut of the afterburner is very harsh. A double-wall structure is set at the integrated strut flame stabilizer for cooling. The multiobjective optimization of the double-wall cooling structure is carried out by using the RBFNN-coupled nondominated sorting genetic algorithm II (NSGA-II), and the complex interaction between the film outflow and the mainstream was explored based on the numerical simulation results. The effects of geometric parameters and external working conditions on the cooling performance of the double wall are studied based on the Sobol method. The results show that the upward spiral vortex behind the strut will press the film outflow to form an irregular air film on the wall, effectively protecting the trailing edge of the strut. The optimized double-wall structure has a better air film coverage effect, and the comprehensive cooling performance has been improved to a certain extent. Compared with the geometric parameters, the mass-flow rate of the cooling gas per unit area has a greater impact on the comprehensive cooling performance of the double wall. The temperature ratio of the main and secondary flows has little effect on the comprehensive cooling performance of the double wall.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This study was supported by the National Science and Technology Major Project, China (No. J2019-III-0019-0063).
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Published In
Journal of Aerospace Engineering
Volume 36 • Issue 5 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Mar 1, 2022
Accepted: Mar 20, 2023
Published online: Jun 5, 2023
Published in print: Sep 1, 2023
Discussion open until: Nov 5, 2023
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