Experimental method for investigating the formation of flow patterns in a very wide gap Taylor-Couette flow (η = 0.1).

IF 0.8 4区 工程技术 Q4 INSTRUMENTS & INSTRUMENTATION Tm-Technisches Messen Pub Date : 2023-03-27 DOI:10.1515/teme-2022-0107
M. H. Hamede, S. Merbold, C. Egbers
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引用次数: 3

Abstract

Abstract In this study, we investigate the turbulent Taylor-Couette (TC) flow experimentally. First, in order to show the formation of the different patterns in the flow, the flow was seeded with kalliroscope particles and by applying a vertical laser sheet we were able to capture the different patterns in the flow. For a further detailed study, the flow field was measured in horizontal planes at different cylinder heights using Particle image velocimetry (PIV). The formation of patterns appears for the counter-rotation configuration where the outer cylinder rotates in the opposing direction of the inner cylinder rotation. For low shear Reynolds numbers, stable Taylor vortices fulfilling the whole gap appear for very low counter-rotation rates. While for the same rotation rates and higher shear Reynold number, large scale patterns with shorter length scale compared to the classical Taylor vortices appears, which can be described as interlaced fingers from in and outflow. The existence of these patterns leads to enhanced angular momentum transport.
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研究甚宽间隙Taylor-Couette流(η = 0.1)流型形成的实验方法。
摘要本文对湍流Taylor-Couette (TC)流动进行了实验研究。首先,为了展示流动中不同模式的形成,流动中播种了万向镜颗粒,通过应用垂直激光片,我们能够捕捉到流动中的不同模式。为了进一步深入研究,利用粒子图像测速技术(PIV)在不同圆柱高度的水平面上测量了流场。图案的形成出现在反旋转构型中,其中外圆柱体以与内圆柱体旋转相反的方向旋转。对于低剪切雷诺数,在极低的反旋转速率下,会出现满足整个间隙的稳定泰勒涡。而在相同的旋转速率和较高的剪切雷诺数下,出现了比经典泰勒涡长度尺度更短的大尺度图案,可以描述为从内到外交错的手指。这些模式的存在导致角动量输运增强。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Tm-Technisches Messen
Tm-Technisches Messen 工程技术-仪器仪表
CiteScore
1.70
自引率
20.00%
发文量
105
审稿时长
6-12 weeks
期刊介绍: The journal promotes dialogue between the developers of application-oriented sensors, measurement systems, and measurement methods and the manufacturers and measurement technologists who use them. Topics The manufacture and characteristics of new sensors for measurement technology in the industrial sector New measurement methods Hardware and software based processing and analysis of measurement signals to obtain measurement values The outcomes of employing new measurement systems and methods.
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