考虑多源模型时间成本的乘波体整流罩宽速域优化  

WAVERIDER FAIRING OPTIMIZATION INCORPORATING MULTI-SOURCE MODEL TIME COST

作　　者：乔南璇 马铁林 薛普 龙泓瑞 付竟成 Qiao Nanxuan;Ma Tielin;Xue Pu;Long Hongrui;Fu Jingcheng(School of Aeronautic Science and Engineering,Beihang University,Beijing 100191,China;Shenyuan Honors College,Beihang University,Beijing 100191,China;Institute of Unmanned System,Beihang University,Beijing 100191,China;Beijing Institute of Space Long March Vehicle,Beijing 100071,China)

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100191 [2]北京航空航天大学沈元学院,北京100191 [3]北京航空航天大学无人系统研究院,北京100191 [4]北京航天长征飞行器研究所,北京100071

出　　处：《力学学报》2025年第3期578-592,共15页Chinese Journal of Theoretical and Applied Mechanics

基　　金：航空科学基金(2024Z006051002);北京市自然科学基金(QY24131);中央高校基本科研业务费专项资金(501QYJC2024129001);未来技术太湖创新基金(1311402)资助项目.

摘　　要：针对目前优化问题中普遍遇到的计算资源消耗量大和收敛时间不可控的问题,提出一种考虑计算模型时间成本的多保真度代理模型优化加点方法,将计算模型的时间成本纳入优化加点过程中,通过动态调整模型依赖度实现在预定时间内收敛到更优解的效果,可以满足在确定的时间节点限制下于有限时间内获得更优方案的工程实际需求,通过不同数值算例的测试验证了该方法的有效性.文章以提升乘波体宽速域飞行性能的实际需求为例,通过乘波体尾部整流罩的参数化,将所提出的优化方法应用于乘波体尾部整流罩的宽速域优化当中,提高了乘波体非设计点的气动性能.分析乘波体尾部升阻力变化发现,优化整流罩在小攻角阶段产生增升减阻效果,随着攻角增大减阻效果降低但是增升效果相对稳定,说明其与乘波体本身的升力性能匹配性较好.从整体气动性能角度考虑,原始整流罩和优化整流罩均不同程度提高了乘波体超声速(Ma=2,4)和高超声速(Ma=6,8)气动性能,优化整流罩的提升效果更加明显,小攻角范围内整体升阻比可提升5%~25%,证明了尾部整流罩优化对乘波体宽速域气动性能的提升效果以及所提出的优化方法在工程应用中的有效性.To address the common challenges of high computational resource consumption and uncontrolled convergence time in optimization problems,this paper proposes a multi-fidelity surrogate model optimization method that considers the time cost of computational models.By incorporating the time cost into the optimization sampling process and dynamically adjusting model fidelity,the method ensures convergence to a better solution within a predetermined time frame.This approach meets the practical engineering requirement of obtaining an optimal design within limited time constraints.The effectiveness of the proposed method is validated through various numerical test cases.Taking the enhancement of the wide-speed-range flight performance of a waverider as a practical example,this study applies the proposed optimization approach to the wide-speed-range optimization of the waverider aft-body fairing through parameterization.The results indicate an improvement in the aerodynamic performance of the waverider at offdesign conditions.Analysis of the lift and drag variations of the waverider aft-body reveals that the optimized fairing generates both lift enhancement and drag reduction effects at small angles of attack.As the angle of attack increases,the drag reduction effect decreases,while the lift enhancement remains relatively stable,demonstrating good compatibility with the waverider’s inherent lift characteristics.From an overall aerodynamic performance perspective,both the original and optimized fairings improve the waverider’s aerodynamic performance at supersonic(Ma=2,4)and hypersonic(Ma=6,8)speeds,with the optimized fairing exhibiting more significant improvements.Within the small angle-ofattack range,the overall lift-to-drag ratio increases by 5%~25%.These findings confirm the effectiveness of aft-body fairing optimization in enhancing the wide-speed-range aerodynamic performance of the waverider and demonstrate the engineering applicability of the proposed optimization method.

关 键 词：多保真度代理模型 期望改进准则 宽速域优化 整流罩 序列加点优化 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]