3D topology optimization design of air natural convection heat transfer fins

IF 1.9 3区 工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY
ChuanChang Dong , ChunBo Zhang , GeNing He , DongHui Li , ZiWei Zhang , JiDong Cong , ZhaoMing Meng , Shehzad Asim , Mehtab Ashraf
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Abstract

This study focuses on the fin-tube heat exchanger and utilizes topology optimization methods to design a completely new fin structure. In this optimization process, complete Navier-Stokes (N-S) equations were used to describe the steady-state incompressible flow, and the Boussinesq model was employed to simulate natural convection. The flow equations were coupled with the heat convection–diffusion equation to achieve topology optimization for natural convection heat transfer. Topology optimization was conducted using density-based optimization methods, and interpolation was performed on the permeability and conductivity of the distributed materials. Given the initial fin structure, an interpolation progressive approach was adopted to obtain a new “ airfoil-shaped” optimized structure through density-based topology optimization method for natural convection. The new structure enhances the convective heat transfer by perforating the fins. The perforations are mainly concentrated in the central region of the heat exchanger and the upper half of the fins. The new structure, compared to the prototype structure, not only has a reduced volume but also exhibits a decrease in convective thermal resistance within a larger range of heat flux densities, as revealed by CFD simulations. Moreover, as the heat flux density increases, the rate of reduction in convective thermal resistance shows an upward trend for the new structure compared to the prototype structure.
空气自然对流传热翅片的三维拓扑优化设计
本研究重点关注翅片管式热交换器,并利用拓扑优化方法设计了一种全新的翅片结构。在优化过程中,使用了完整的纳维-斯托克斯(N-S)方程来描述稳态不可压缩流动,并采用了布森斯克模型来模拟自然对流。流动方程与热对流-扩散方程耦合,以实现自然对流传热的拓扑优化。拓扑优化采用基于密度的优化方法,并对分布材料的渗透性和传导性进行插值。在初始翅片结构的基础上,通过基于密度的自然对流拓扑优化方法,采用插值渐进方法获得了一种新的 "翼形 "优化结构。新结构通过在翅片上穿孔来增强对流传热。穿孔主要集中在热交换器的中心区域和翅片的上半部分。CFD 模拟显示,与原型结构相比,新结构不仅缩小了体积,而且在更大的热流密度范围内降低了对流热阻。此外,随着热流密度的增加,与原型结构相比,新结构的对流热阻降低率呈上升趋势。
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来源期刊
Nuclear Engineering and Design
Nuclear Engineering and Design 工程技术-核科学技术
CiteScore
3.40
自引率
11.80%
发文量
377
审稿时长
5 months
期刊介绍: Nuclear Engineering and Design covers the wide range of disciplines involved in the engineering, design, safety and construction of nuclear fission reactors. The Editors welcome papers both on applied and innovative aspects and developments in nuclear science and technology. Fundamentals of Reactor Design include: • Thermal-Hydraulics and Core Physics • Safety Analysis, Risk Assessment (PSA) • Structural and Mechanical Engineering • Materials Science • Fuel Behavior and Design • Structural Plant Design • Engineering of Reactor Components • Experiments Aspects beyond fundamentals of Reactor Design covered: • Accident Mitigation Measures • Reactor Control Systems • Licensing Issues • Safeguard Engineering • Economy of Plants • Reprocessing / Waste Disposal • Applications of Nuclear Energy • Maintenance • Decommissioning Papers on new reactor ideas and developments (Generation IV reactors) such as inherently safe modular HTRs, High Performance LWRs/HWRs and LMFBs/GFR will be considered; Actinide Burners, Accelerator Driven Systems, Energy Amplifiers and other special designs of power and research reactors and their applications are also encouraged.
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