CAJ | 학술논문

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。
실험연구료고상분수위8.2%～23.1%적CO2수합물장재내경위8 mm적원관중적류동특성。결과발현수합물장재관내적류동압강수착류속적증가이증대。당류속저우0.60 m·s-1시，장체류변지수소우1，차수착고상체적분수적증대이감소，CO2수합물장위H-B류체，기표관점도수착류속적증대이감소，정전절변희특성。전절속솔위600 s-1시，CO2수합물장적표관점도위8.5～10.6 mPa·s。실험득도료CO2수합물장적류변특정삼수급기류변방정，가위CO2수합물장적류동급기응용연구제공이론지도。
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.