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OALib Journal期刊
ISSN: 2333-9721
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物性对换热表面颗粒沉积特性的影响
, PP. 80-86
Keywords: 换热器,圆管,飞灰颗粒,气固两相流动,顺排管束,叉排管束,杨氏模量,颗粒密度,沉积特性
Abstract:
为了研究飞灰颗粒和管壁材料的物理性质对换热器壁面颗粒沉积特性的影响,采用欧拉-拉格朗日方法及ei-batsh和haselbacher提出的粒子沉积模型模拟稀疏气固两相流,进而分析飞灰颗粒横掠圆管束时受热表面的颗粒沉积分布。结果表明:杨氏模量对颗粒的沉积影响很大,粒径较大时,杨氏模量的增加颗粒在壁面沉积率降低,粒径较小时,杨氏模量对沉积的影响减弱；壁面材料杨氏模量的影响程度比颗粒杨氏模量稍弱；颗粒密度增大,沉积率降低。
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