Numerical study on vortex characteristics in submerged impinging stream reactor

被引：0
|
作者：
Zhang J. [1 ]
Gao W. [1 ]
Dong X. [1 ]
Feng Y. [1 ]
机构：
[1] School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Liaoning, Shenyang
来源：
Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 08期
关键词：
flow regime; fluid mechanics; impinging stream; numerical simulation; turbulent flow; vortex structure;
D O I：
10.11949/0438-1157.20220277
中图分类号：
学科分类号：
摘要：
The large eddy simulation (LES) method was used to study the vortex characteristics in impinging stream reactor, and the fluid flow characteristics in the impact area were analyzed. The distribution of flow field velocity, vorticity magnitude and the average plane vortex energy was studied by changing inlet velocity and nozzle spacing. The flow regime, vortex evolution process and vortex core form were analyzed. The vortex striking near the stagnation point in the reactor had small size and high pulsation. With the increased of impact distance, the fluid velocity magnitude gradually decreased and the influence range of vortex became larger. The average vorticity magnitude and the average vortex plane energy first increased and then decreased with the increased of inlet velocity. The vortex evolution process and the flow regime in the reactor were analyzed based on Q criterion. According to the vortex evolution process of radial jet, the evolution period of vortex on both sides of radial jet was obtained, which was between 0.15 s and 0.20 s. The vortex structures in the impact zone were horseshoe vortex and ribbed vortex, and there was a vortex ring at the outlet. The research results provide a theoretical reference for the in-depth analysis of the fluid motion law of the impingement flow reactor and optimization of the reactor. © 2022 Materials China.
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页码：3553 / 3564
页数：11
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