CIESC Journal ›› 2014, Vol. 65 ›› Issue (2): 550-554.DOI: 10.3969/j.issn.0438-1157.2014.02.026

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Flow properties of CO2 hydrate slurry in circular tube

LIU Ni, DAI Haifeng, YU Hongyi, YOU Longtao   

  1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2013-06-14 Revised:2013-08-19 Online:2014-02-05 Published:2014-02-05
  • Supported by:

    supported by the National Natural Science Foundation of China(50706028) and the Innovation Program of Shanghai Municipal Education Commission(12YZ106).

二氧化碳水合物浆在圆管中的流动特性

刘妮, 戴海凤, 余宏毅, 由龙涛   

  1. 上海理工大学能源与动力工程学院, 上海 200093
  • 通讯作者: 刘妮(1974- ),女,博士,副教授。
  • 基金资助:

    国家自然科学基金项目(50706028);上海市教委科研创新项目(12YZ106)。

Abstract: An experimental setup was established to produce CO2 hydrate slurry by cooling after CO2 injection in precooled water. The flow characteristics of CO2 hydrate slurry with 8.2%—23.1%(vol) in a 8 mm straight stainless steel circular tube were studied in a dynamic loop. The pressure drops of CO2 hydrate slurry were measured and it increased with the increase of flow rate. The flow of CO2 hydrate slurry presente non-Newtonian behavior. At flow rate v < 0.60 m·s-1, behavior index n < 1 and decreased with the increase of solid fraction. CO2 hydrate slurry behaved as a Herschel-Bulkley fluid. Apparent viscosity decreased with the increase of shear rate, showing shear-thinning characteristics. Apparent viscosity of CO2 hydrate slurry was from 8.5 mPa·s to 10.6 mPa·s at shearing rate of 600 s-1. The rheological parameters and equations were determined, providing the guide for the research of CO2 hydrate slurry flow properties and its application.

Key words: carbon dioxide, hydrate slurry, flow, pressure drop, viscosity

摘要: 实验研究了固相分数为8.2%~23.1%的CO2水合物浆在内径为8 mm的圆管中的流动特性。结果发现水合物浆在管内的流动压降随着流速的增加而增大。当流速低于0.60 m·s-1时,浆体流变指数小于1,且随着固相体积分数的增大而减小,CO2水合物浆为H-B流体,其表观黏度随着流速的增大而减小,呈剪切变稀特性。剪切速率为600 s-1时,CO2水合物浆的表观黏度为8.5~10.6 mPa·s。实验得到了CO2水合物浆的流变特征参数及其流变方程,可为CO2水合物浆的流动及其应用研究提供理论指导。

关键词: 二氧化碳, 水合物浆, 流动, 压降, 黏度

CLC Number: