【24h】

Fouling thresholds in bare tubes and tubes fitted with inserts

机译:裸露管子和装有插件的管子中的结垢阈值

获取原文
获取原文并翻译 | 示例

摘要

Maya crude oil fouling reveals a straightforward dependency of initial fouling rate on surface temperature but a rather complex dependency on velocity in bare tubes, the initial fouling rate showing a maximum and then decreasing significantly towards zero as the velocity is increased. Surface shear stress clearly is an important parameter. CFD simulation of fluid flow in a tube fitted with a hiTRAN® insert reveals a complex distribution of surface shear stress. To compare the insert situation with the bare tube, an equivalent velocity concept is introduced on the basis that at a given average velocity the fluid flow results in the same average wall shear stress regardless of whether the tube is bare or is fitted with an insert. Using the equivalent velocity concept, the fouling data obtained using both a bare tube and a tube fitted with inserts can be correlated using a single model. Moreover, the fouling threshold conditions below which fouling is negligible, can be predicted for both situations.
机译:玛雅原油结垢揭示了初始结垢率与表面温度的直接相关性,但与裸管中速度的相关性非常复杂,初始结垢率显示出最大值,然后随着速度的增加而显着降低至零。表面剪切应力显然是重要的参数。装有hiTRAN®插入件的管中流体流动的CFD模拟显示出表面剪切应力的复杂分布。为了将插入件与裸管的情况进行比较,引入了一个等效速度的概念,即在给定的平均速度下,无论管子是裸露的还是装配有插入件,流体流动都会产生相同的平均壁切应力。使用等效速度概念,可以使用单个模型关联使用裸管和装有插件的管获得的结垢数据。此外,对于两种情况都可以预测结垢阈值条件,在该阈值条件下可以忽略不计。

著录项

  • 来源
    《Applied Energy》 |2012年第1期|p.67-73|共7页
  • 作者

    Mengyan Yang; Barry Crittenden;

  • 作者单位

    Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom;

    Department of Chemical Engineering, University of Bath, Bath BA2 7AY, United Kingdom;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    fouling; threshold conditions; crude oil; hiTRAN~® inserts; CFD;

    机译:结垢临界条件;原油;hiTRAN〜®刀片;差价合约;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

联系方式:18141920177 (微信同号)

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号