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首页> 外文期刊>Heat Transfer Engineering >Development of a Predictive CFD Fouling Model for Diesel Engine Exhaust Gas Systems
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Development of a Predictive CFD Fouling Model for Diesel Engine Exhaust Gas Systems

机译：柴油机废气系统的预测CFD结垢模型的开发

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摘要

This article presents a numerical simulation procedure for studying soot particle deposition in diesel exhaust systems, with a particular focus on fouling layer thickness evolution. In the proposed algorithm, particle transport toward the wall, adhesion, and reentrainment of particles from the surface have been modeled, including Brownian motion and turbulent diffusion, thermophoresis, adhesion, and removal. This model has been implemented in ANSYS Fluent, which makes the inclusion of local effects possible. A cross-flow device, with a tube positioned transverse to the flow, has been simulated and tested. A comparison of the predicted fouling layer at several angular positions with the experimental observation shows acceptable agreement. This model makes it possible to predict the real depth of the fouling layer and its effects on the hydrodynamics of the flow. This model represents a valuable tool for the prediction of the main aspects of the performance of heat exchangers exposed to fouling.
机译：本文提出了一种用于研究柴油机排气系统中烟灰颗粒沉积的数值模拟程序，特别关注结垢层厚度的演变。在提出的算法中，已经对粒子向壁的传输，附着以及粒子从表面重新夹带进行了建模，包括布朗运动和湍流扩散，热泳，附着和去除。该模型已在ANSYS Fluent中实现，这使得包含局部效果成为可能。模拟和测试了横流设备，该设备的管子横向于流向放置。在几个角度位置的预测结垢层与实验观察结果的比较表明可以接受。该模型可以预测结垢层的实际深度及其对流动流体动力学的影响。该模型代表了用于预测结垢的热交换器性能主要方面的有价值的工具。

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  • 来源
    《Heat Transfer Engineering》 |2013年第9期|674-682|共9页
  • 作者

    CONCEPCION PAZ; EDUARDO SUAREZ; ANTONIO EIRIS; JACOBO PORTEIRO;

  • 作者单位

    Address correspondence to Professor Concepcion Paz, Escuela de Ingenieria Industrial, University of Vigo, Lagoas Marcosende 9, Vigo CP-36310, Spain;

    Escuela de Ingenierfa Industrial, University of Vigo, Vigo, Spain;

    Escuela de Ingenierfa Industrial, University of Vigo, Vigo, Spain;

    Escuela de Ingenierfa Industrial, University of Vigo, Vigo, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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