穿孔板矩形通道内气体流动的数值模拟

IF 1.1 4区 工程技术 Q4 THERMODYNAMICS
Z. Marković, M. Eric, R. Jovanović, I. Lazović
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引用次数: 0

摘要

穿孔板是大型电厂静电除尘器广角扩散器中常用的气流控制装置。许多研究涉及穿孔板的影响调查。在来流垂直于板且板覆盖整个流道截面的情况下,S几何形状对流动参数的影响。这些结果部分适用于流动在板上倾斜的情况,或者当板没有占据通道的整个横截面时。这项工作的主题是一个数值研究流动的矩形通道与穿孔板在不同的位置在通道的横截面。目的是研究板的位置对流动的影响。采用定向损失模型将多孔板模拟为有限厚度的薄多孔介质。利用计算流体动力学软件Ansys CFX进行了数值实验。将板后压降和速度分布结果与全三维板模型的CFD模拟结果进行了比较。采用简化薄多孔板模型时,为了使板后的压降和速度分布合理一致,必须对板的流向渗透率值进行调整。调整的水平是迭代确定的,它取决于板块在通道中的位置。横截面。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical simulation of the gas flow through the rectangular channel with perforated plate
The perforated plates are commonly used for gas flow control in the wide-angle diffusers of electrostatic precipitators of large power plants. Many studies dealt with the investigation of the effects of the perforated plate?s geometry on flow parameters in the cases where incoming flow is perpendicular to the plate and the plate is covering the whole cross-section of the flowing channel. These results are partially applicable in cases where flow is inclined on the plate or when the plate is not occupying the whole cross-section of the channel. The subject of this work is a numerical investigation of flow through the rectangular channel with a perforated plate in various positions in the cross-section of the channel. The aim was to investigate the effect of the plate position on the flow. The perforated plates were modeled as thin porous media of finite thickness by using the directional loss model. Numerical experiments are carried out by using Computational Fluid Dynamics software Ansys CFX. Results of pressure drop and velocity distribution behind the plate are compared to the results of CFD simulation of the full 3D plate model. In order to obtain a reasonable agreement both of the pressure drop and velocity distribution behind the plate when using a simplified thin porous plate model, the value of streamwise permeability of the plate had to be adjusted. The level of adjustments has determined iteratively and it depends on the plate position in the channel?s cross-section.
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来源期刊
Thermal Science
Thermal Science 工程技术-热力学
CiteScore
2.70
自引率
29.40%
发文量
399
审稿时长
5 months
期刊介绍: The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.
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