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液固两相流中内螺旋胶囊机器人运行特性研究
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国家自然科学基金项目(51875051;51575256);湖南省教育厅科学研究重点项目(16A019);湖南省自然科学基金项目(2016JJ6007).


Study on Characteristics of Inner Spiral Capsule Robot in Liquidsolid Twophase Flow
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    摘要:

    目前国内外对肠道机器人的研究都是针对单相液体流环境,而肠液中实际存在食物残渣,肠道环境应为液固两相混合流体。采用计算流体力学方法计算了在液固两相混合流体中,内螺旋胶囊机器人轴向推进力、周向阻力矩和管道内壁所受最大压力等运行性能指标,并进行了实验验证。结果表明:在液固两相流中,机器人轴向推进力和周向阻力矩基本都随着固相颗粒尺寸和质量分数的增大而减小,而管道内壁所受最大压力随之增大;在液固两相流环境中机器人运行性能指标均低于单相液体流环境。实验证明在液体管道环境中,加入固相颗粒将降低内螺旋胶囊机器人运行性能。

    Abstract:

    The study of intestinal robots now at home and abroad is focused on the singlephase liquid flow environment,while there exists food residues in the actual intestine,and the intestinal fluid should be liquidsolid twophase mixed fluid.The operational performance indicators of inner spiral capsule robots in liquidsolid twophase flow,including axial thrust force,circumferential resisting moment and the maximum pressure of pipe wall were numerically calculated by using the computational fluid dynamics (CFD) method,and the calculation results were validated by experiment.The results show that in the liquidsolid twophase flow,with the increasing of the diameter and weight concentration of the solid particles,the axial thrust force and circumferential resisting moment of the robot are decreased and the maximum pressure of pipe wall is increased.The performance indicators of the robot in liquidsolid twophase flow are lower than those in singlephase liquid flow.The experiments prove that adding the solid particles will decrease the operational performance of the inner spiral capsule robot in the liquid pipe.

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唐蒲华.液固两相流中内螺旋胶囊机器人运行特性研究[J].润滑与密封,2018,43(9):62-66.
. Study on Characteristics of Inner Spiral Capsule Robot in Liquidsolid Twophase Flow[J]. Lubrication Engineering,2018,43(9):62-66.

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  • 在线发布日期: 2018-09-26
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