Study on Resistance Characteristics of Capillary Flow in Screen Wick Based on CFD Method

被引：0
作者：
Yu Q. [1 ]
Zhao P. [1 ,2 ]
Ma Y. [2 ,3 ]
Zhang Y. [2 ]
机构：
[1] School of Nuclear Science and Technology, University of South China, Hunan, Hengyang
[2] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu
[3] Department of Engineering Physics, Tsinghua University, Beijing
来源：
Hedongli Gongcheng/Nuclear Power Engineering | 2023年 / 44卷 / 01期
关键词：
Capillary performance factor; Flow resistance; Inertial resistance; Screen wick; Viscous resistance;
D O I：
10.13832/j.jnpe.2023.01.0054
中图分类号：
学科分类号：
摘要：
Screen wick heat pipe is a kind of passive heat transfer equipment based on the principle of two-phase flow phase change cycle. The capillary force and flow resistance in the cycle are closely related to the structure of the screen wick. The study of the resistance characteristics of the screen wick is of great significance to the selection and optimization of the screen wick structure and the improvement of the heat pipe performance. Based on computational fluid dynamics (CFD), a resistance model of capillary flow in screen is established to study the resistance characteristics of capillary flow in multi-layer wire screen wick. The model is used to simulate the capillary lifting experiment, and the relative error between the model and the experimental results is less than 5%. Based on the model, the effects of stacking structure and mesh number (50 mesh, 200 mesh, 400 mesh) on the flow resistance characteristics of screen wick are further analyzed. The results show that the denser the mesh is, the greater the flow resistance is, the viscous resistance coefficient is approximately proportional to the mesh number, and the equivalent inertia resistance increases with the increase of the mesh number. In the low velocity region where Reynolds number is less than 1, viscous resistance plays a dominant role, while in the velocity region where Reynolds number is greater than 1, inertia resistance cannot be ignored; The geometric structure of the screen wick not only affects the flow resistance, but also affects the capillary force. The calculation shows that the capillary pressure and flow resistance of the screen increase with the increase of mesh number, and the capillary performance factor slows down with the increase of mesh number. Considering the process limitation of plain woven screen, 400 mesh screen is ideal. © 2023 Yuan Zi Neng Chuban She. All rights reserved.
引用
收藏
页码：54 / 59
页数：5
相关论文
共 19 条
  • [1] FAGHRI A., Review and advances in heat pipe science and technology, Journal of Heat Transfer, 134, 12, (2012)
  • [2] 40, 4, pp. 1-8, (2019)
  • [3] WANG C L, TANG S M, LIU X, Et al., Experimental study on heat pipe thermoelectric generator for industrial high temperature waste heat recovery, Applied Thermal Engineering, 175, (2020)
  • [4] CHAUDHRY H N, HUGHES B R, GHANI S A., A review of heat pipe systems for heat recovery and renewable energy applications, Renewable and Sustainable Energy Reviews, 16, 4, pp. 2249-2259, (2012)
  • [5] CHOI J, SANO W, ZHANG W J, Et al., Experimental investigation on sintered porous wicks for miniature loop heat pipe applications, Experimental Thermal and Fluid Science, 51, pp. 271-278, (2013)
  • [6] 1, 2, pp. 156-164, (1980)
  • [7] RYBKIN B I, SERGEEV Y Y, SIDORENKO E M, Et al., Investigation of the coolant edge wetting angle for mesh heat pipe wicks, Journal of Engineering Physics, 36, 4, pp. 408-413, (1979)
  • [8] CANTI G, CELATA G P, CUMO M, Et al., Thermal hydraulic characterization of stainless steel wicks for heat pipe applications, Revue Générale de Thermique, 37, 1, pp. 5-16, (1998)
  • [9] TANG Y, DENG D X, LU L S, Et al., Experimental investigation on capillary force of composite wick structure by IR thermal imaging camera, Experimental Thermal and Fluid Science, 34, 2, pp. 190-196, (2010)
  • [10] CHAMARTHY P, DE BOCK H P J, RUSS B, Et al., Novel fluorescent visualization method to characterize transport properties in micro/Nano heat pipe wick structures, Proceedings of the ASME 2009 InterPACK Conference Collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability, pp. 419-425, (2009)
12