三角形涡发生器综合换热性能全局优化和知识挖掘

推进技术 ›› 2017, Vol. 38 ›› Issue (10): 2298-2305.

三角形涡发生器综合换热性能全局优化和知识挖掘

陶志,祝培源,宋立明,李军,丰镇平

西安交通大学能源与动力工程学院，陕西西安 710049,西安交通大学能源与动力工程学院，陕西西安 710049,西安交通大学能源与动力工程学院，陕西西安 710049,西安交通大学能源与动力工程学院，陕西西安 710049,西安交通大学能源与动力工程学院，陕西西安 710049

发布日期:2021-08-15
作者简介:陶志，男，硕士生，研究领域为叶轮机械气动热力学与优化设计。E-mail: tz1269327815@stu.xjtu.edu.cn 通讯作者:宋立明，博士，副教授，研究领域为叶轮机械气动优化设计。
基金资助:
国家自然科学基金(51676149)。

Thermal Performance Global Optimization and Knowledge Discovery of Delta-Shaped Vortex Generators

School of Energy and Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China,School of Energy and Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China,School of Energy and Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China,School of Energy and Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China and School of Energy and Power Engineering，Xi’an Jiaotong University，Xi’an 710049，China

Published:2021-08-15

摘要/Abstract

摘要： 为了强化布置三角形涡发生器的U型通道综合换热性能，耦合基于子元模型的全局优化算法、三角形涡发生器参数化方法、三维RANS方程求解技术与基于总变差分析的知识挖掘技术，建立了高效的三角形涡发生器综合换热性能优化与知识挖掘方法。在验证本文数值方法正确性的基础上，以综合换热性能最优为目标函数，对布置于U型通道内的三角形涡发生器进行设计优化与知识挖掘。优化后，最优设计的三角形涡发生器诱导产生的下洗涡对的强度和间距增加，使得U型通道的综合换热性能相对提高了14.5%。同时对设计空间进行知识挖掘，筛选对综合换热性能影响显著的设计变量，分析显著变量对目标函数的影响机制。结果表明:三角形涡发生器的高度对通道换热能力和阻力损失的影响最为显著，而三角形涡发生器的宽度对通道综合换热性能的影响最为显著。

关键词: 三角形涡发生器；综合换热性能；全局优化设计；知识挖掘

Abstract: In order to enhance thermal performance of a U-shaped channel equipped with delta-shaped vortex generators， a meta-model based design optimization and data mining method is proposed for the thermal performance optimization design of the delta-shaped vortex generator. The method combines a Kriging-based global optimization algorithm with data mining technique of analysis of variance (ANOVA)， parameterization method for delta-shaped vortex generator and 3D Reynolds-Averaged Navier-Stokes (RANS) Solver technique. Upon numerical validation， design optimization of a U-shaped channel equipped with delta-shaped vortex generators is carried out for the maximization of its overall thermal performance. After optimization， both the intensity and the space of the down-wash vortex pairs generated by the delta-shaped vortex generators increased， and thus the overall thermal performance of the optimal design increased by 14.5% when compared to that of the reference design. Furthermore， knowledge discovery is carried out to detect the design variables which have significant effects on the thermal performance of U-shaped channel in prescribed design space. The parameter interactions among significant design variables and objective functions are analyzed in detail. It is indicated that the length of delta-shaped vortex generator has most significant effect on heat transfer and friction loss of U-shaped channel， while the width of delta-shaped vortex generator has most significant effect on the thermal performance of U-shaped channel.

Key words: Delta-shaped vortex generator；Thermal performance；Global optimization design；Knowledge discover

陶志,祝培源,宋立明,李军,丰镇平. 三角形涡发生器综合换热性能全局优化和知识挖掘[J]. 推进技术, 2017, 38(10): 2298-2305.

TAO Zhi,ZHU Pei-yuan,SONG Li-ming,LI Jun,FENG Zhen-ping. Thermal Performance Global Optimization and Knowledge Discovery of Delta-Shaped Vortex Generators[J]. Journal of Propulsion Technology, 2017, 38(10): 2298-2305.

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