单粒粗颗粒90°弯道水力输送不稳定流动试验研究

IF 3.8 2区 工程技术 Q1 ENGINEERING, MECHANICAL
Hui Cheng  (, ), Hong Xiong  (, ), Yuxiang Chen  (, ), Hong Zhu  (, ), Chunliang Yu  (, ), Guodong Zheng  (, ), Yiyang Xing  (, )
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引用次数: 0

摘要

弯管有助于管道系统的灵活布置,但由于其复杂的流动特性,也导致了巨大的能源成本。本实验研究了单个粗颗粒对弯管内流场的影响。采用时间分辨粒子图像测速法测量了弯道轴对称面上流体的速度分布。采用适当的正交分解方法提取流场结构。结果表明,在输送过程中,弯管内存在剪切层流动。随着颗粒尺寸的增大,颗粒对整体流动的流能分布具有主导作用。粒子对前几次高能流的影响主要发生在输运的后期,无论是在时间上还是空间上。随着颗粒尺寸的减小,弯道内能量最大的非定常流动由对流流动转变为剪切层流动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Experimental study on unsteady flow of hydraulic conveying of a single coarse particle through a 90° bend

Bends contribute to a flexible layout of pipeline system, but also lead to intensive energy costs due to the complex flow characteristic. This experimental study is conducted to investigate the impact of a single coarse particle on the flow field in a bend. The velocity profiles of fluid on the axial symmetry plane of the bend are measured using time-resolved particle image velocimetry. The flow structures are extracted using the proper orthogonal decomposition method. The results reveal that there is a shear-layer flow in the bend during the transportation. With the increase in particle size, the particle has a dominant influence on the flow energy distribution of the overall flow. The impact of particles on the first few energetic flows is mainly in the latter part of the transportation, both temporally and spatially. As the particle size decreases, the most energetic unsteady flow within the bend changes from the convective flow to the flow of the shear layer.

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来源期刊
Acta Mechanica Sinica
Acta Mechanica Sinica 物理-工程:机械
CiteScore
5.60
自引率
20.00%
发文量
1807
审稿时长
4 months
期刊介绍: Acta Mechanica Sinica, sponsored by the Chinese Society of Theoretical and Applied Mechanics, promotes scientific exchanges and collaboration among Chinese scientists in China and abroad. It features high quality, original papers in all aspects of mechanics and mechanical sciences. Not only does the journal explore the classical subdivisions of theoretical and applied mechanics such as solid and fluid mechanics, it also explores recently emerging areas such as biomechanics and nanomechanics. In addition, the journal investigates analytical, computational, and experimental progresses in all areas of mechanics. Lastly, it encourages research in interdisciplinary subjects, serving as a bridge between mechanics and other branches of engineering and the sciences. In addition to research papers, Acta Mechanica Sinica publishes reviews, notes, experimental techniques, scientific events, and other special topics of interest. Related subjects » Classical Continuum Physics - Computational Intelligence and Complexity - Mechanics
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