CIESC Journal ›› 2022, Vol. 73 ›› Issue (2): 643-652.DOI: 10.11949/0438-1157.20211106

• Fluid dynamics and transport phenomena • Previous Articles     Next Articles

Analysis and calculation of friction resistance of gas-liquid flow in inclined riser pipe under fluctuating vibration

Yunlong ZHOU(),Qichao LIU()   

  1. College of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, Jilin, China
  • Received:2021-08-09 Revised:2021-09-30 Online:2022-02-18 Published:2022-02-05
  • Contact: Qichao LIU

起伏振动倾斜上升管气液两相流摩擦阻力分析与计算

周云龙(),刘起超()   

  1. 东北电力大学能源与动力工程学院,吉林省 吉林市 132012
  • 通讯作者: 刘起超
  • 作者简介:周云龙(1960—),男,博士,教授,neduzyl@163.com
  • 基金资助:
    国家自然科学基金项目(51776033)

Abstract:

Accurate calculation of frictional pressure drop of gas-liquid two-phase flow under fluctuating vibration is of great significance to the development of marine nuclear power. The variation of frictional pressure drop of gas-liquid two-phase flow in a 30° inclined riser pipe under different vibration and flow conditions was studied by experiment. The results show that the fluctuation amplitude and average value of friction pressure drop increase significantly under fluctuating vibration. Compared with the static state, the multi-scale entropy of friction pressure drop increases obviously except bubble flow, and the phenomenon of large-scale oscillation is present, which indicates that the instability of gas-liquid two-phase flow is more significant. The calculated results of the static friction pressure drop model are quite different from the experimental values, and the existing models are not suitable for the fluctuating vibration state. It is found that the friction coefficient is inversely proportional to the homogeneous Reynolds number and directly proportional to the vibration amplitude and frequency. Based on a large number of experimental data, the calculation formula of friction resistance coefficient suitable for fluctuating vibration state is established, and the calculation results are in good agreement with the experimental results.

Key words: gas-liquid flow, fluctuating vibration, inclined riser pipe, friction resistance, prediction, model

摘要:

起伏振动下气液两相流摩擦压降的准确计算对海洋核动力的发展有重要意义。实验研究了不同振动和流动工况下30°倾斜上升管气液两相流摩擦压降的变化规律。结果表明,起伏振动下摩擦压降波动幅度和平均值显著增大。与静止状态相比,起伏振动下摩擦压降的多尺度熵值除泡状流外明显增大,且呈现大幅振荡现象,流动不稳定性更加显著。静止状态摩擦压降模型计算结果与实验值误差较大,现有模型对于起伏振动状态不适用。分析流动和振动参数对摩擦阻力系数的影响,发现其与均相雷诺数成反比,与振动幅值以及频率成正比。以大量实验数据为基础,建立了适用于起伏振动状态的摩擦阻力系数计算关系式,计算与实验结果吻合较好。

关键词: 气液两相流, 起伏振动, 倾斜上升管, 摩擦压降, 预测, 模型

CLC Number: