CIESC Journal ›› 2023, Vol. 74 ›› Issue (9): 3766-3774.DOI: 10.11949/0438-1157.20230674

• Fluid dynamics and transport phenomena • Previous Articles     Next Articles

Two-phase flow simulation and surrogate-assisted optimization of gas film drag reduction in high-concentration coal-water slurry pipeline

Song HE1,2(), Qiaomai LIU1, Guangshuo XIE1, Simin WANG1, Juan XIAO1()   

  1. 1.School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
    2.School of Chemical Engineering &Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
  • Received:2023-07-03 Revised:2023-09-02 Online:2023-11-20 Published:2023-09-25
  • Contact: Juan XIAO


何松1,2(), 刘乔迈1, 谢广烁1, 王斯民1, 肖娟1()   

  1. 1.西安交通大学化学工程与技术学院,陕西 西安 710049
    2.中国矿业大学化工学院,江苏 徐州 221116
  • 通讯作者: 肖娟
  • 作者简介:何松(2001—),男,硕士研究生,
  • 基金资助:


To solve the problem of high-concentration coal-water slurry (CWS) pipeline transportation with large resistance, it was proposed to inject gas into the coal-water slurry pipeline and adopt gas film to reduce the resistance loss of the pipeline. For Bingham non-Newtonian fluid CWS, based on the volume of fluid (VOF) multiphase flow model, the effects of the key parameters of the gas pipe on the drag coefficient were analyzed through numerical simulation, and the influence of genetic aggregation response surface model and nonlinear programming by quadratic Lagrangian (NLPQL) algorithm were combined to perform surrogate-assisted optimization. The results show that the gas pumping inlet into the CWS pipeline can effectively reduce the wall shear stress, the gas velocity and the diameter of the gas pipe have a significant effect on the pipeline resistance coefficient. In addition, increasing the gas velocity and the diameter of the gas pipe can reduce the resistance coefficient, while the pipeline resistance coefficient is almost unaffected by the angle of the gas pipe. Taking the minimization of the resistance coefficient as the objective function, a set of gas pipe parameters is obtained. After optimization the resistance coefficient of the pipeline decreased by 0.0207, and the drag reduction rate is improved by 16.90%. The research results provide theoretical guidance for the mechanism and structural optimization of gas injection for drag reduction in high-concentration CWS pipelines.

Key words: coal-water slurry for pipe transportation, gas film drag reduction, non-Newtonian fluids, numerical simulation, surrogate-assisted optimization, two-phase flow



关键词: 管输煤浆, 气膜减阻, 非牛顿流体, 数值模拟, 代理辅助优化, 两相流

CLC Number: