Analysis of dynamic characteristics of flow field in impinging stream reactor based on step jet

被引：0
|
作者：
Zhang J. [1 ]
An F. [1 ]
Dong X. [1 ]
Feng Y. [1 ]
机构：
[1] Shenyang University of Chemical Technology, School of Mechanical and Power Engineering, Shenyang
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 02期
关键词：
Dynamic control; Experimental validation; Impinging stream; Numerical simulation; Turbulent flow;
D O I：
10.11949/0438-1157.20211135
中图分类号：
学科分类号：
摘要：
The flow field characteristics of dynamic step impinging stream reactor were studied by experimental and numerical simulation methods, and the fluid flow law, turbulence characteristics and energy level under different inlet velocities were analyzed. The results show that under the condition of dynamic step inlet, the impact surface moved periodically between the two nozzles, and the flow parameters also changed periodically. The stagnation velocity was increased with the average inlet velocity. With the increase of the inlet velocity difference between the two nozzles, the moving speed of the impact surface was accelerated, and the fluid turbulence intensity in the impact zone was increased gradually. With the increase of the difference between the inlet average velocity and the inlet velocity, the average turbulent kinetic energy of XOZ plane in one cycle was gradually decreased. The flow field characteristics in dynamic impinging stream reactor and steady-state impinging stream reactor were compared to explore the influence of dynamic inlet conditions on the flow field characteristics of impinging stream reactor. The results show that the parameters of turbulent viscosity, turbulence intensity and turbulent kinetic energy of dynamic step impinging stream reactor were significantly higher than those of steady-state impinging stream reactor, and the gradient distribution of turbulent kinetic energy on the impact axis was greater than that of steady-state impinging stream reactor. Under the condition of dynamic inlet, the fluid turbulence in the impinging stream reactor was more intense and the energy level was higher, which was conducive to increasing the fluid disturbance and promoting mixing in the flow field. © 2022, Editorial Board of CIESC Journal. All right reserved.
引用
收藏
页码：622 / 633
页数：11
相关论文
共 31 条
  • [1] Wu Y., Impinging Streams: Fundamental, Properties and Applications, pp. 3-12, (2006)
  • [2] Hu H, Chen Z M, Jiao Z., Characterization of micro-mixing in a novel impinging streams reactor, Frontiers of Chemical Engineering in China, 3, 1, pp. 58-64, (2009)
  • [3] Wu Y, Zhou Y X, Guo J, Et al., Features of impinging streams intensifying processes and their applications, International Journal of Chemical Engineering, 2010, pp. 1-16, (2010)
  • [4] Zhang J W, Yan Y H, Sha X L, Et al., Advances on impinging stream intensification mixing mechanism for preparing ultrafine powders, Chemical Industry and Engineering Progress, 39, 3, pp. 824-833, (2020)
  • [5] Yue S, Liu X Q., Study of the drying characteristics in an asymmetric impinging stream reactor, Chemical Papers, 75, 8, pp. 4355-4370, (2021)
  • [6] Fang S Q, Zhang X Y, Li S Q, Et al., Investigation on separation of CO<sub>2</sub> from biogas by hydrate method in impinging stream reactor, CIESC Journal, 71, 5, pp. 2099-2108, (2020)
  • [7] Liu Z W, Zhang Q C, Wen L X, Et al., Preparation of ultrafine manganese dioxide by micro-impinging stream reactors and its electrochemical properties, The Canadian Journal of Chemical Engineering, 94, 3, pp. 461-468, (2016)
  • [8] Chen Z Y, Liu Y, Zhang Y Z, Et al., Ultrafine layered graphite as an anode material for lithium ion batteries, Materials Letters, 229, pp. 134-137, (2018)
  • [9] Xu X L., Experimental and numerical study on engulfment regime of impinging jets reactors, (2019)
  • [10] Nie A, Wang Z M, Han J, Et al., Experimental investigation of flow and reacting characteristics in asymmetric confined impinging jets reactor, Scientia Sinica (Chimica), 48, 6, pp. 648-657, (2018)
1234