系统仿真学报 ›› 2016, Vol. 28 ›› Issue (4): 826-832.

• 仿真系统与技术 • 上一篇    下一篇

挡板长度对辐流式沉淀池水力特性影响的数值模拟

魏文礼, 张泽伟, 洪云飞, 刘玉玲   

  1. 西安理工大学 陕西省西北旱区生态水利工程重点实验室,西安 710048
  • 收稿日期:2014-11-26 修回日期:2015-04-26 出版日期:2016-04-08 发布日期:2020-07-02
  • 作者简介:魏文礼(1965-),男,陕西大荔,博士,教授,研究方向为环境水力学、水污染控制理论与技术。
  • 基金资助:
    国家自然科学基金(51178391);陕西省科学研究计划(2014K15-03-05);中央财政支持地方高校发展专项资金特色重点学科(106-00X101)

Numerical Simulation for Influence of Baffle Length on Hydraulic Characteristics in Radial Sedimentation Tanks

Wei Wenli, Zhang Zewei, Hong Yunfei, Liu Yuling   

  1. State Key Laboratory of Eco-Hydraulic Engineering in Shaanxi, Xi'an University of Technology, Xi'an 710048, China
  • Received:2014-11-26 Revised:2015-04-26 Online:2016-04-08 Published:2020-07-02

摘要: 采用VOF(volume of fluid)方法追踪自由液面,辅以RNG(重正化群)湍流模型封闭两相流时均方程,模拟并分析了进水口处垂直挡板不同长度对辐流式沉淀池水力特性的影响。控制方程的离散采用有限体积法,速度与压力耦合求解使用了压力隐式算子分裂PISO(Pressure-Implicit with Splitting of Operators)算法。研究结果表明:长挡板模型的回流区比短挡板小,流速场分布更合理,有利于提高沉淀效率。研究结果可为实际工程中沉淀池的优化设计提供参考。

关键词: 沉淀池, 数值模拟, 水力特性, 流场

Abstract: The VOF (volume of fluid) method was applied to track the free water surface, and the RNG turbulent model was used to close the two-phase flow time-averaged equations. The influence of inlet vertical baffle with different lengths on hydraulic characteristics in radial sedimentation tank was simulated and analyzed. The control equations were discretized using the finite volume method. Velocity and pressure were solved using the PISO (Pressure-Implicit with Splitting of Operators) algorithm. The research results show that: the long length feed flow baffle model has a smaller recirculation zone, better velocity field distribution than short length baffle, and the long length feed flow baffle model is conducive to improve sedimentation efficiency. The results can provide a reference for optimization design of an actual engineering of sedimentation tanks.

Key words: sedimentation tank, numerical simulation, hydraulic characteristics, flow field

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