用于性能预测的大型水泥磨风机瞬态数值模拟

IF 0.6 4区 工程技术 Q4 MECHANICS Mechanika Pub Date : 2023-02-06 DOI:10.5755/j02.mech.32170
Aissa Amour, N. Menasri
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引用次数: 0

摘要

在许多工程应用中,颗粒流是输送过程的必要组成部分,但在其他情况下,它们可能会产生意想不到的后果,必须避免。作为排气过程的一部分,安装在水泥厂的诱导水泥磨风机(FN-280)在存在高含量水泥颗粒的临界条件下运行。随着时间的推移,被拖拽的固体颗粒侵蚀风扇的旋转和静止部件,导致它们损坏。如果决定采用数值方法来预测最容易发生侵蚀的区域,并通过假设连续和离散固相之间的单向耦合制度来跟踪风扇区域内固体颗粒的轨迹,则需要深入了解离心风机内的流动物理。为此,本文对大型工业离心风机的孔内非定常流场进行了三维数值模拟。考虑了叶轮与排气蜗壳之间的非定常相互作用,采用了完全分解的滑动网格方法。基于特征性能曲线,用实验数据验证了四种工况下的非定常数值模拟结果。结果表明,非定常模拟结果与实验结果的吻合程度较好,证明了本文所采用的建模方法的有效性。
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Transient Numerical Simulation of a Large-Sized Cement-Mill Fan for Performance Prediction
In many engineering applications, particle-laden flows are a necessary part of the conveying process, but in other situations, they could have unintended consequences that must be avoided. As a part of the exhausting process, the induced cement-mill fan (FN-280) installed in a cement plant operates under critical conditions with the presence of high content of cement particles. Over time the dragged solid particles erode the rotating and stationary parts of the fan causing their damage. If one decides on a numerical approach to predict regions most prone to erosion and track the solid particle's trajectory within the fan domain by assuming a one-way coupling regime between the continuous and discrete solid phases, a deep insight into the flows physics within the centrifugal fan is required. With this aim, a three-dimensional numerical approach for the hole unsteady flow in a large-sized industrial centrifugal fan has been carried out in this paper. A fully resolved sliding mesh approach was employed to take into account the unsteady interaction between the impeller and the discharge volute. Based on the characteristic performance curves, the numerical results of the unsteady simulation at four operating conditions are validated with the experimental data. The comparisons reveal that the results of the unsteady simulation are in an acceptable level of agreement with the experiment, demonstrating the validity of the modelling approach adopted in this study.
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来源期刊
Mechanika
Mechanika 物理-力学
CiteScore
1.30
自引率
0.00%
发文量
50
审稿时长
3 months
期刊介绍: The journal is publishing scientific papers dealing with the following problems: Mechanics of Solid Bodies; Mechanics of Fluids and Gases; Dynamics of Mechanical Systems; Design and Optimization of Mechanical Systems; Mechanical Technologies.
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