The contribution of differently-sized ash particles to the fouling trends of a pilot-scale coal-fired combustor with an ash deposition CFD model
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- 作者：Manuel Garcí ; a Pé ; rez ; manuel.garcia.perez@lut.fi" class="auth_mail" title="E-mail the corresponding author ; Esa Vakkilainen ; Timo Hyppä ; nen
- 关键词：Fouling ; Coal combustion ; Ash deposition ; Computational fluid dynamics ; Boilers
- 刊名：Fuel
- 出版年：2017
- 出版时间：1 February 2017
- 年：2017
- 卷：189
- 期：Complete
- 页码：120-130
- 全文大小：4388 K
文摘
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A CFD model for ash fouling with a newer drag law for fine particles is presented.
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A whole heat exchanger is modeled with ash particles ranging from 0.015 μm to 15 μm.
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The gas velocity seemed more important for the deposition than the tube deposits.
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The behavior of particles below 4 μm seemed to be identical for each studied case.
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This suggests a limiting particle diameter for the inertial impaction.