The impact of wall roughness on new generation cyclone performance and erosion: a numerical study

IF 2.8 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Computational Particle Mechanics Pub Date : 2024-12-07 DOI:10.1007/s40571-024-00861-5

Mobina Heidari, Hossein Moghadamrad, Abolfazl Mohammadebrahim

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引用次数: 0

Abstract

In this study, the performance and erosion of new generation cyclones were evaluated under different conditions of wall roughness using computational fluid dynamics. The Navier–Stokes equations were solved using the Reynolds stress model. Additionally, the Oka model was used to predict erosion, and the discrete phase model (DPM) simulated the behavior of suspended particles. The study compared pressure contours, tangential velocity, and axial velocity across various wall roughness conditions. The impact of wall roughness on separation efficiency, pressure drop, and wall erosion was investigated, along with the effects of velocity parameters and particle diameter on wall erosion. The findings revealed a significant influence of wall roughness on cyclone behavior and performance. An increase in wall roughness from 0 to 1 mm at a velocity of 20 m/s led to a reduction in pressure drop by approximately 34.06% and separation efficiency by about 6.20%, due to enhanced friction between the vortex and the wall. Additionally, increased wall roughness reduced particle impact velocity on the cyclone wall, decreasing the erosion rate by approximately 31%. However, higher inlet velocity and larger particle diameter were found to exacerbate cyclone wall erosion.

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壁面粗糙度对新一代旋风分离器性能和冲蚀影响的数值研究

本文采用计算流体力学的方法，对不同壁面粗糙度条件下新一代旋风分离器的性能和侵蚀进行了研究。采用雷诺应力模型求解Navier-Stokes方程。此外，还采用Oka模型对侵蚀进行了预测，离散相模型（DPM）模拟了悬浮颗粒的行为。该研究比较了不同壁面粗糙度条件下的压力轮廓、切向速度和轴向速度。研究了壁面粗糙度对分离效率、压降和壁面冲蚀的影响，以及速度参数和粒径对壁面冲蚀的影响。研究结果表明，壁面粗糙度对旋流器的行为和性能有显著影响。在20 m/s速度下，壁面粗糙度从0增加到1 mm，由于涡流与壁面之间的摩擦增强，压降降低了约34.06%，分离效率降低了约6.20%。此外，壁面粗糙度的增加降低了颗粒对旋风壁面的冲击速度，使侵蚀率降低了约31%。然而，较高的进口速度和较大的颗粒直径加剧了旋风分离器壁面的侵蚀。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Computational Particle Mechanics Mathematics-Computational Mathematics

CiteScore

5.70

自引率

9.10%

发文量

期刊介绍： GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research. SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including: (a) Particles as a physical unit in granular media, particulate ﬂows, plasmas, swarms, etc., (b) Particles representing material phases in continua at the meso-, micro-and nano-scale and (c) Particles as a discretization unit in continua and discontinua in numerical methods such as Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.