Multidisciplinary design optimization of axisymmetric exhaust systems: Integrating aerodynamic performance and infrared stealth capabilities

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-10-10 DOI:10.1016/j.ijthermalsci.2024.109462

Lan Bo, Qiang Wang, Haiyang Hu

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引用次数: 0

Abstract

An integration of collaborative optimization (CO) strategy was undertaken to improve aerodynamic performance and mitigate the infrared signature of the axisymmetric exhaust system. The Optimal Latin Hypercube method was utilized to construct a kriging surrogate model, considering influential factors such as nozzle geometric parameters, thermodynamic parameters, and material properties of nozzle components. The aerodynamic performance of the nozzle was computed using the Computational Fluid Dynamics (CFD) method, while the assessment of infrared characteristics of the exhaust system was conducted using the multiscale multigroup wide band k-distribution model (MSMGWB) and the Ray Tracing Method. Following a comprehensive evaluation and selection process of optimized results, improvements were observed: the discharge coefficient experienced an increase of up to 1.72 %, the thrust coefficient showed an increase of up to 1.19 %, and a notable reduction of up to 31.23 % in tail direction dimensionless infrared radiation intensity was achieved among all optimized outcomes. The CO method successfully decouples these two tightly coupled disciplines, enabling independent optimization while ensuring consistency between them. By transforming the multi-objective optimization problem into a single-objective optimization within the system and optimizer, this method allows for the rapid and accurate identification of the optimal design that balances aerodynamic performance and infrared stealth according to mission requirements.

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轴对称排气系统的多学科优化设计：整合空气动力性能和红外隐形能力

为了提高空气动力性能并减轻轴对称排气系统的红外特征，研究人员采用了集成协同优化（CO）策略。考虑到喷嘴几何参数、热力学参数和喷嘴部件的材料属性等影响因素，利用最优拉丁超立方法构建了克里金替代模型。使用计算流体动力学（CFD）方法计算了喷嘴的空气动力学性能，同时使用多尺度多组宽带 k 分布模型（MSMGWB）和光线跟踪方法对排气系统的红外特性进行了评估。在对优化结果进行综合评估和选择后，观察到了一些改进：排放系数增加了 1.72%，推力系数增加了 1.19%，在所有优化结果中，尾部方向无量纲红外辐射强度显著降低了 31.23%。CO 方法成功地解耦了这两个紧密耦合的学科，实现了独立优化，同时确保了它们之间的一致性。通过将多目标优化问题转化为系统和优化器内的单目标优化，该方法可根据任务要求快速准确地确定兼顾气动性能和红外隐身的最佳设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.