3-D CFD numerical simulation of transient impact of slug flow on elbow

被引：0
|
作者：
Kang J. [1 ]
Liu F. [1 ]
Hou Q. [1 ]
He J. [2 ]
Lin L. [3 ]
机构：
[1] School of Architectural Engineering, Tianjin University, Tianjin
[2] College of Water Resources and Architectural Engineering, Northwest A & F University, Yangling
[3] Suzhou Thermal Research Institute, Suzhou
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 23期
关键词：
3-D computational fluid dynamics (CFD) numerical simulation; elbow impact; gas-liquid two-phase flow; slug flow; volume of fluid (VOF);
D O I：
10.13465/j.cnki.jvs.2022.23.038
中图分类号：
学科分类号：
摘要：
In pipeline system of nuclear power station and thermal power station, high-pressure steam from upstream can accelerate movement of condensed water mass ( Slug) in pipeline, and produce violent impact force at non-continuous parts, such as, elbow, tee and valve to cause serious damage to pipeline, and affect safe operation of power station. Here, aiming at high-dimensional dynamic characteristics of pipe slug movement, CFD was used to perform 3-D numerical simulation study for movement and impact process of a single slug in an empty pipe with elbow, and compare the numerical simulation results with the physical experimental results in literature. The results showed that impact pressure time history curve and pressure peak value simulated with CFD agree well with the experimental results; based on theoretical analysis, 3 trends of pressure changes with time in impact process are proposed and discussed in detail, and their correctness is verified with numerical simulation; through analyzing time history change of slug length, slug mass shedding rate curve is obtained; based on transient impact velocity of slug obtained with numerical simulation, the simplified theoretical calculation method of impact pressure is verified, the theoretical calculation value basically agrees well with experimental and numerical simulation results, so the correctness of CFD numerical simulation and the rationality of the simplified calculation method of impact pressure are verified, they both have guiding significance in practical engineering application. © 2022 Chinese Vibration Engineering Society. All rights reserved.
引用
收藏
页码：322 / 329
页数：7
相关论文
共 16 条
  • [1] HOU Qingzhi, LI Shunda, LIN Lei, Et al., Impact force on end obstacles due to water slug travelling in a void steam line
  • [2] a review, Chinese Journal of Nuclear Science and Engineering, 39, 2, pp. 179-188, (2019)
  • [3] LIU Shuqian, ZHOU Meiwu, Analysis of water slug impact (water hammer) in the steam pipes of NPP, Chinese Journal of Nuclear Science and Engineering, 3, 3, pp. 226-231, (1995)
  • [4] WANG Weiji, WU Wei, ZHANG Jing, Et al., Numerical simulation and analysis of gas-liquid two-phase severe slug flow in pipeline, Journal of Vibration and Shock, 37, 6, pp. 140-146, (2018)
  • [5] FENTON R M, GRIFFITH P., The force at a pipe elbow due to the clearing of water trapped upstream [C], Transient Thermal Hydraulics and Resulting Loads on Vessel and Piping Systems, (1990)
  • [6] NEUMANN A, GRIFFITH P., Forces on a pipe elbow resulting from clearing a pool of liquid upstream, Fluid-Structure Interaction, Transient Thermal Hydraulics and Structural Mechanics, (1992)
  • [7] BOZKUS Z, WIGGERT D C., Liquid slug motion in a voided line [J], Journal of Fluids & Structures, 11, pp. 947-963, (1997)
  • [8] OWEN I, HUSSEIN I B., The propulsion of an isolated slug through a pipe and the forces produced as it impacts upon an orifice plate, International Journal of Multiphase Flow, 20, 3, pp. 659-666, (1994)
  • [9] KAYHAN B A, BOZKUS Z., A new method for prediction of the transient force generated by a water slug impact on an elbow of an initially voided line, Journal of Pressure Vessel Technology, 133, (2011)
  • [10] TIJSSELING A S, HOU Q, BOZKUS Z., An improved ID model for water slugs traveling in pipelines [C], Proceedings of the ASME Pressure Vessels & Piping Division Conference, (2014)
12