CFD-BASED NUMERICAL SIMULATION OF GAS FLOW FIELD CHARACTERISTICS IN CLOSE-COUPLED VORTICAL LOOP SLIT GAS ATOMIZATION

2021 ◽  
Author(s):  
Min Zhang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Gas Flow ◽  
Gas Atomization ◽  
Flow Field Characteristics ◽  
Gas Flow Field

FLUENT-Based Numerical Simulation of Gas Flow Field of Excimer Laser

2016 ◽  
Vol 43 (9) ◽  
pp. 0901007
Author(s):  
朱能伟 Zhu Nengwei ◽  
方晓东 Fang Xiaodong
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Excimer Laser ◽  
Gas Flow ◽  
Gas Flow Field

scholarly journals Flow field optimizing study of low temperature economizer in a coal-fired boiler

2021 ◽  
Vol 261 ◽  
pp. 01040
Author(s):  
Xiaochuan Deng ◽  
Fengchang Sun ◽  
Zhonghua Bai ◽  
Zongze Yu ◽  
Jiahua Wu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Low Temperature ◽  
Flow Field ◽  
Gas Flow ◽  
Complex Structure ◽  
Evaluation Standard ◽  
Guide Plate ◽  
Porous Media Model ◽  
Computational Fluid Dynamics Cfd ◽  
Gas Flow Field

The complex structure of double inlet gas flue has a significant influence on gas flow field distribution in a 1000MW coal-fired boiler’s low temperature economizer. In order to optimize gas flow field of the low temperature economizer with double inlet gas flues and reduce its failure rate, this paper presents a flow field simulation of the low temperature economizer based on the computational fluid dynamics (CFD). This numerical simulation was operated by using porous media model instead of the complex structure inside heat exchanger and the standard k-epsilon model. Velocity contours of a same vertical cross-section inside of inlet gas flue of the heat exchange zone in different numerical simulations were evaluated by the evaluation standard of RSM. The results of numerical simulation show that the main reasons for uneven distribution of flow field in economizer and its inlet gas flues are unequal diameter of flue elbow and straight flue, unreasonable setting of guide plate and diffusion flue elbow. After making structural optimization of the low temperature economizer such as equalizing elbow to the straight flue diameter and setting the guide plate reasonably, the flow field in the low temperature economizer and its flues are obviously improved.

scholarly journals Numerical Simulation and Inversive Study of Gas Flow Field Around Coal Bed Borehole

2011 ◽  
Vol 26 ◽  
pp. 1234-1239
Author(s):  
Xiaoyan Song ◽  
Zhongpeng Xie
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Gas Flow ◽  
Coal Bed ◽  
Gas Flow Field

Numerical Simulation Research of Air-Assisted Atomizer Internal Gas Flow Field Based on Fluent

2014 ◽  
Vol 599-601 ◽  
pp. 377-380
Author(s):  
Qiao Li ◽  
Ya Yu Huang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Total Pressure ◽  
High Speed ◽  
Gas Flow ◽  
Static Pressure ◽  
Mutual Influence ◽  
Simulation Research ◽  
Simulation Calculation ◽  
Gas Flow Field

The numerical simulation calculation of air-assisted atomizer internal gas flow field is done, the distribution and changes of the nozzle inside flow field total pressure, velocity, and dynamic and static pressure are analyzed. The analysis shows that the total pressure loss is less; due to the effect of gas viscous, the high-speed air flow is formed vortex flow near the outlet nozzle and the mutual influence between the dynamic and static pressure. A new way is supported for optimizing the nozzle structure according to these studies.

Numerical Simulation of Flow Field within Mutational Section Pipe

2012 ◽  
Vol 192 ◽  
pp. 190-195
Author(s):  
Jian Hua Zhang ◽  
Kun Hu ◽  
Yi Fan Xu
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Pipe Flow ◽  
Gas Flow ◽  
Two Dimensional ◽  
One Dimensional ◽  
Compressed Gas ◽  
Interior Flow ◽  
Gas Flow Field

The section mutation of a pipe affects the interior flow field seriously. Numerical simulation of the two-dimensional steady gas flow field of two types of section mutation pipe was processed. By comparing it with equivalent section pipe’s interior flow field, the effects of section mutation of pipe on pressure distributing and velocity distributing were analyzed. The results are commendably consistent with the theories of one-dimensional adiabatic frictional pipe flow. Ensuring the section of the compressed gas pipe to be coherent and using the bell and spigot joint if necessary are presented.

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