...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Water Research >CFD and physical models of PM separation for urban drainage hydrodynamic unit operations
【24h】

CFD and physical models of PM separation for urban drainage hydrodynamic unit operations

机译：城市排水水力单元运行的PM分离CFD和物理模型

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A hydrodynamic separator (HS) is a common pre-treatment unit operation (UO) for separating coarser particulate matter (PM). While HS designs have disparate internal geometries, surface areas, and volumes; for a given PM granulometry this study hypothesizes there are limits to PM separation. In this study, a large group of full-scale HS units were tested with physical and computational fluid dynamics (CFD) models to evaluate HS functionality based on surface overflow rate (SOR), HS geometrics (diameter, height, baffling), PM granulometry, particle size distribution (PSD), turnover volume, hydraulic capacity, and short-circuiting. Models were loaded with a hetero-disperse PSD, a common testing metric. PM separation results show that PSD variability greater than +/- 2% from this metric are different (a = 0.05). Comparing PM separation using the PSD metric across the SOR range: (1) all HS results were below the ideal SOR model, (2) above Hazen's tanks-in-series model with N= 1, (3) above plain tank designs, and (4) declined logarithmically in a +/- 10% range. Integrated across a triangular loadgraph, the SOR model significantly over-estimated PM separation for all HS units. The SOR model deviated from the validated CFD model, as PSD loadings became increasingly mono-disperse. A validated CFD model is shown to be a valuable tool to examine HS design and functionality. (C) 2019 Published by Elsevier Ltd.
机译：流体动力分离器（HS）是常见的预处理单元操作（UO），用于分离较粗的颗粒物（PM）。 HS设计具有不同的内部几何形状，表面积和体积；对于给定的PM粒度分析，本研究假设PM分离存在局限性。在这项研究中，使用物理和计算流体动力学（CFD）模型对大量满量程HS单元进行了测试，以基于表面溢流率（SOR），HS几何形状（直径，高度，折流），PM粒度分析来评估HS功能，粒度分布（PSD），周转量，液压容量和短路。模型加载了杂散PSD，这是一种常见的测试指标。 PM分离结果表明，与该指标相比，PSD变异性大于+/- 2％是不同的（a = 0.05）。在整个SOR范围内使用PSD度量比较PM分离：（1）所有HS结果均低于理想SOR模型；（2）高于Hazen的串联坦克模型，N = 1；（3）高于普通坦克设计；以及（4）对数下降+/- 10％。 SOR模型集成在整个三角形载荷图中，大大高估了所有HS单元的PM分离。随着PSD负载变得越来越单分散，SOR模型偏离了经过验证的CFD模型。经过验证的CFD模型被证明是检查HS设计和功能的有价值的工具。 （C）2019由Elsevier Ltd.发布

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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