Experimental investigation of the wake behind a rotating sphere

被引：8

作者：

Skarysz, M. ^{[1
,3
]}

Rokicki, J. ^{[1
]}

Goujon-Durand, S. ^{[2
]}

Wesfreid, J. E. ^{[2
]}

机构：

[1] Warsaw Univ Technol, Inst Aeronaut & Appl Mech, Nowowiejska 24, PL-00665 Warsaw, Poland

[2] Ecole Superieure Phys & Chim Ind Ville Paris, UPD, UPMC, CNRS,ESPCI,Lab Phys & Mecan Millieux Heterog PMMH, F-75231 Paris 05, France

[3] Loughborough Univ Technol, Dept Aeronaut & Automot Engn, Loughborough LE11 3TU, Leics, England

来源：

PHYSICAL REVIEW FLUIDS | 2018年 / 3卷 / 01期

关键词：

STABILITY ANALYSIS; SWIRLING JETS; FLOW; EVOLUTION;

D O I：

10.1103/PhysRevFluids.3.013905

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The wake behind a sphere, rotating about an axis aligned with the streamwise direction, has been experimentally investigated in a low-velocity water tunnel using laser-induced fluorescence visualizations and particle image velocimetry measurements. The measurements focused on the evolution of the flow regimes that appear depending on two control parameters: the Reynolds number Re and the dimensionless rotation or swirl rate Omega, which is the ratio of the maximum azimuthal velocity of the body to the free-stream velocity. In the present investigation, we cover the range of Re smaller than 400 and Omega from 0 and 4. Different wakes regimes such as an axisymmetric flow, a low helical state, and a high helical mode are represented in the (Re, Omega) parameter plane.

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页数：22

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