Study of the gas-solid flow characteristics of ice particles in helically coiled tubes
Study of the gas-solid flow characteristics of ice particles in helically coiled tubes
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DOI：
10.1016/j.powtec.2023.118975
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发表时间：
2023-09
影响因子：
5.2
通讯作者：
Wenbo He;Mengke Wang;Jingchao Chen;Qilei Yin;Pinlu Cao
中科院分区：
文献类型：
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作者：
Wenbo He;Mengke Wang;Jingchao Chen;Qilei Yin;Pinlu Cao
鉴于极地地区独特的气候和地表条件，高效的钻井作业至关重要。为了提高钻井效率，提出了一种利用螺旋螺旋管（HCT）输送冰粒的新技术。本研究采用Ansys-Fluent 2022 R2欧拉-欧拉模型，重点研究了HCT内冰颗粒的气固流动特性。数值模拟结果与实验数据吻合良好，最大误差仅为11.27%。受离心力和二次流的影响，观察到垂直于流动方向的三个不同的流动区域。进口气速、管内内径、盘管直径、颗粒直径、钻速等因素均影响HCT内冰颗粒输运比（ITR）和压降。值得注意的是，将管内径从30 mm增加到75 mm，使ITR显著提高398.7%，而颗粒直径的变化对ITR的影响最小。
Efficient drilling operations in polar regions are crucial given their unique climate and surface conditions. To improve drilling efficiency, a novel technology utilizing helically coiled tubes (HCT) for transporting ice particles has been proposed. This study focuses on the gas-solid flow characteristics of ice particles within the HCT employing the Eulerian-Eulerian models of Ansys-Fluent 2022 R2. Numerical simulations were validated against experimental data, showing good agreement with a maximum error of merely 11.27%. Three distinct flow regions perpendicular to the flow direction were observed, influenced by centrifugal force and secondary flow. The inlet gas velocity, tube inner diameter, coil diameter, particle diameter, and penetration rate all affected the ice particle transport ratio (ITR) and the pressure drop in the HCT. Notably, increasing the tube inner diameter from 30 mm to 75 mm led to a remarkable 398.7% rise in the ITR, while particle diameter changes minimally affected ITR.