The effect of cell aspect ratio on flow and heat transfer characteristics of anisotropic Kelvin foam

ZHANG Chao; KONG Xiangzhuang; DU Yanxia; WANG Xian; XIAO Guangming

doi:10.7638/kqdlxxb-2023.0059

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The effect of cell aspect ratio on flow and heat transfer characteristics of anisotropic Kelvin foam

更新时间：2026-07-27

- The effect of cell aspect ratio on flow and heat transfer characteristics of anisotropic Kelvin foam
- Vol. 42, Issue 1, Pages: 55-66(2024)
- 作者机构：
  
  1. 西安交通大学航天航空学院，机械结构强度与振动国家重点实验室，陕西省先进飞行器服役环境与控制重点实验室,西安,710049
  2. 空天飞行空气动力科学技术全国重点实验室,绵阳,621000
- 作者简介：
- 基金信息：
- DOI：10.7638/kqdlxxb-2023.0059
  CLC： V211.3;TG154;V435+.14
- Published：2024
- 稿件说明：
移动端阅览
张超, 孔祥壮, 杜雁霞, 等. 各向异性Kelvin泡沫胞元高径比对其流动传热特性的影响[J]. 空气动力学学报, 2024, 42(1): 55−66.

ZHANG Chao, KONG Xiangzhuang, DU Yanxia, et al. The effect of cell aspect ratio on flow and heat transfer characteristics of anisotropic Kelvin foam[J]. 2024, 42(1): 55-66.
张超, 孔祥壮, 杜雁霞, 等. 各向异性Kelvin泡沫胞元高径比对其流动传热特性的影响[J]. 空气动力学学报, 2024, 42(1): 55−66. DOI： 10.7638/kqdlxxb-2023.0059

ZHANG Chao, KONG Xiangzhuang, DU Yanxia, et al. The effect of cell aspect ratio on flow and heat transfer characteristics of anisotropic Kelvin foam[J]. 2024, 42(1): 55-66. DOI： 10.7638/kqdlxxb-2023.0059.

摘要

飞行器热管理系统中所用的高孔隙率泡沫材料具有质量轻、比表面积大等优点，孔隙尺度几何参数的优化设计对有效提升综合传热性能、降低结构质量至关重要。以各向异性Kelvin泡沫胞元为研究对象，采用混合热格子Boltzmann方法以及多GPU加速技术，实现了同时考虑泡沫骨架导热和多胞元孔隙尺度强迫对流换热的共轭传热数值模拟。在上述基础上，分别选取了

= 10、100、

1000

计算条件，开展了不同胞元高径比（

= 0.5、0.75、1.0、1.5、2.0）对其流动传热特性的影响规律研究。结果表明，在不同

条件下，随着各向异性Kelvin泡沫

的减小，其泡沫内部的流动阻力及努塞尔数均增大，且随着

的增大，对流换热的作用增强，

的影响也更为明显。此外，相比于流动阻力，结构传热性能受

的影响变化速率更大，由此造成综合传热因子（

j/f

1/3

）与

成反比关系，即减小Kelvin胞元

H/D

可有效提高泡沫结构的综合传热性能。

Abstract

High-porosity foam materials are widely used in aircraft thermal management systems due to their light weight and large surface area. The optimization of the geometric parameters in pore scale is crucial for effectively improving the overal

l heat transfer performance and reducing the structural weight. This paper focuses on anisotropic Kelvin foam structures and uses a hybrid lattice Boltzmann method and multi-GPU acceleration technology to perform conjugate heat transfer numerical simulations that considers both foam skeleton conduction and forced convection heat transfer in the pores on the pore scale. Different cell aspect ratios (

= 0.5

0.75

1.0

1.5

2.0) were selected with various Reynolds numbers (

= 10

100

1000

) to study the effect of cell aspect ratio on flow and heat transfer characteristics. The results show that under different

conditions

as the

of the anisotropic Kelvin foam decreases

the flow resistance and Nusselt number inside the foam increase. As the Reynolds number increases

the effect of convective heat transfer becomes stronger

and the influence of

becomes more significant. In addition

compared with flow resistance

the structural heat transfer performance changes more rapidly with

and therefore

the comprehensive heat transfer factor is inversely proportional to

which means reducing the

of Kelvin foams can effectively improve the overall heat transfer performance of foam structure.

关键词

Keywords

references

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