Influence of control cylinder placement on vortex shedding from a circular cylinder

被引：11
|
作者：
Bingham, Conrad [1 ]
Morton, Chris [1 ]
Martinuzzi, Robert J. [1 ]
机构：
[1] Univ Calgary, Dept Mech & Mfg Engn, Calgary, AB T2N 1N4, Canada
来源：
EXPERIMENTS IN FLUIDS | 2018年 / 59卷 / 10期
基金：
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词：
LOW REYNOLDS-NUMBERS; INDUCED VIBRATIONS; COHERENT STRUCTURES; FLUCTUATING LIFT; BLUFF-BODIES; WAKE; SUPPRESSION; FLOW; CLASSIFICATION; TURBULENCE;
D O I：
10.1007/s00348-018-2615-z
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Modifications to the vortex- shedding dynamics from a circular cylinder of diameter D are investigated experimentally in a free- surface water channel at Re D = 9500. The vortex shedding is modified via the placement of a control cylinder of diameter D/ 8 in the vicinity of the main cylinder. A methodology is presented to link changes in the wake dynamics and loading on the main cylinder. The analysis combines fourier model decomposition, proper orthogonal decomposition, and phase averaging. Based on differences in the wake dynamics, the influence of the control cylinder can be classified according to its placement: ( 1) in the free stream outside the main cylinder shear layer; ( 2) within the main cylinder shear layer; ( 3) in the recirculation region. While fluctuating lift is significantly reduced in all the cases, the mean and fluctuating drag are affected differently.
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页数：22
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