Particle deposition characteristics of supercritical CO2 in different ribbed tubes

被引：0
|
作者：
Mao S. [1 ]
Zhou T. [1 ]
Lu H. [1 ]
Liu W. [1 ]
机构：
[1] School of Energy and Environment, Southeast University, Nanjing
来源：
Dongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Southeast University (Natural Science Edition) | 2022年 / 52卷 / 06期
关键词：
deposition efficiency; particle deposition; ribbed tube; supercritical CO[!sub]2[!/sub;
D O I：
10.3969/j.issn.1001-0505.2022.06.011
中图分类号：
学科分类号：
摘要：
To study the effects of different tube shapes on the particle deposition in supercritical CO2, geometric models of smooth tube, rectangular ribbed tube and semicircular ribbed tube are established. The AKN k-ε model is used to predict the flow characteristics of supercritical CO2 and the particles inside the fluid are traced based on the discrete particle model. The particle deposition characteristics in the range of fluid velocity from 2 m/s to 6 m/s, inlet temperature from 290 K to 330 K and particle diameter from 1 μm to 10 μm are analyzed. The results show that the deposition efficiency of small-size (dp <5 μm) particles remains stable and the deposition efficiency of large-size (dp ≥5 μm) particles decreases with the increase of the flow velocity. Below the pseudo-critical point, the particle deposition velocity is not affected by the fluid temperature. Above the pseudo-critical point, the particle deposition velocity increases with the increase of the fluid temperature. Because of the large turbulent kinetic energy and secondary flow region in the ribbed tube, the particle deposition efficiency in the ribbed tube is larger than that in the smooth tube. Both rectangular and semicircular ribs are arranged in the tube to facilitate particle deposition, and the deposition efficiency of the rectangular ribbed tube is greater than that of the semicircular ribbed tube. © 2022 Southeast University. All rights reserved.
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页码：1114 / 1121
页数：7
相关论文
共 20 条
  • [1] Wang J F, Wang Y L, Zhou Y, Et al., Investigations on supercritical CO<sub>2</sub> critical flow through mini tubes, Nuclear Power Engineering, 42, 2, pp. 35-38, (2021)
  • [2] Zhang Y, Wang C L, Tang S M, Et al., Analysis of thermal-hydraulic characteristic of solid heat pipe reactor simulator device, Atomic Energy Science and Technology, 55, 6, pp. 984-990, (2021)
  • [3] Wu J D, Liu Q, Wang H., Experimental investigation of fine particle precipitation in rectangular duct with staggered baffles, CIESC Journal, 69, pp. 15-19, (2018)
  • [4] Zhu L Y, Zhou T, Qin X M, Et al., Study on sedimentation movement of fine particles in pipelines of different sizes, Nuclear Science and Engineering, 39, 5, pp. 695-700, (2019)
  • [5] Ma D L, Zhou T, Li B, Et al., Study on the movement and deposition of particles in supercritical water, International Journal of Heat and Mass Transfer, 136, pp. 55-69, (2019)
  • [6] Zhou T, Li Z C, Li B, Et al., Study on the method of nuclear power operation and analysis of movement and deposition of accident particles, Scientia Sinica (Physica, Mechanica & Astronomica), 49, 11, pp. 20-42, (2019)
  • [7] Wei M M, Wang F F, Xu X H, Et al., Numerical investigation of particle deposition in ventilation ducts with convex or concave wall cavity, Building Energy & Environment, 36, 8, pp. 5-9, (2017)
  • [8] Wang F F, Zhang E S, Xu X H, Et al., Particle deposition in ventilation duct with convex or concave wall cavity, Journal of Central South University, 25, 11, pp. 2601-2614, (2018)
  • [9] Hong W P, Wang X., Numerical investigation on fine particles deposition in channels with rough surface, Proceedings of the CSEE, 38, 13, pp. 3889-3895, (2018)
  • [10] Huang Q Y, Luo K, Fan J R., Numerical simulation of particle deposition in semicircular ribbed duct, Journal of Zhejiang University (Science Edition), 49, 1, pp. 112-120, (2022)
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