Vortex structure behind a highly heated cylinder in turbulent crossflow

Yuji Yahagi, Shogo Yoshino

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Karman vortex structure behind a highly heated cylinder in a turbulent crossflow has been studied experimentally. The surface temperature of the cylinder is set up to 800°C. The Reynolds number based on the cylinder diameter is 750. For the heated cylinder set in the turbulent crossflow, the Karman vortex street can be clearly observed as the cylinder temperature is increased. Since the local temperature of the generated vortex is remarkably high compared with the main (low, the Karman vortex dissipating energy due to the main flow turbulence decreases with an increasing the cylinder temperature. Then, the local temperature of the vortex also decreases due to the turbulence motion. As the results, the vortex frequency-decreasing rate due to the cylinder heating in the turbulent crossflow becomes 1/2 compared with the laminar case.

Original languageEnglish
Pages (from-to)1219-1226
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume67
Issue number657
Publication statusPublished - 2001 May

Fingerprint

Vortex flow
vortices
Turbulence
Temperature
turbulence
Karman vortex street
temperature
Reynolds number
surface temperature
Heating
heating
energy

Keywords

  • Fluid mechanics
  • Forced convection
  • Heat transfer
  • Kantian vortex
  • Local kinematic viscosity
  • Particle image velocimetry
  • Strouhal number
  • Turbulent flow
  • Vortex
  • Wake

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

@article{48098766dd2f4178a038f757f5da6ff1,
title = "Vortex structure behind a highly heated cylinder in turbulent crossflow",
abstract = "Karman vortex structure behind a highly heated cylinder in a turbulent crossflow has been studied experimentally. The surface temperature of the cylinder is set up to 800°C. The Reynolds number based on the cylinder diameter is 750. For the heated cylinder set in the turbulent crossflow, the Karman vortex street can be clearly observed as the cylinder temperature is increased. Since the local temperature of the generated vortex is remarkably high compared with the main (low, the Karman vortex dissipating energy due to the main flow turbulence decreases with an increasing the cylinder temperature. Then, the local temperature of the vortex also decreases due to the turbulence motion. As the results, the vortex frequency-decreasing rate due to the cylinder heating in the turbulent crossflow becomes 1/2 compared with the laminar case.",
keywords = "Fluid mechanics, Forced convection, Heat transfer, Kantian vortex, Local kinematic viscosity, Particle image velocimetry, Strouhal number, Turbulent flow, Vortex, Wake",
author = "Yuji Yahagi and Shogo Yoshino",
year = "2001",
month = "5",
language = "English",
volume = "67",
pages = "1219--1226",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "Japan Society of Mechanical Engineers",
number = "657",

}

TY - JOUR

T1 - Vortex structure behind a highly heated cylinder in turbulent crossflow

AU - Yahagi, Yuji

AU - Yoshino, Shogo

PY - 2001/5

Y1 - 2001/5

N2 - Karman vortex structure behind a highly heated cylinder in a turbulent crossflow has been studied experimentally. The surface temperature of the cylinder is set up to 800°C. The Reynolds number based on the cylinder diameter is 750. For the heated cylinder set in the turbulent crossflow, the Karman vortex street can be clearly observed as the cylinder temperature is increased. Since the local temperature of the generated vortex is remarkably high compared with the main (low, the Karman vortex dissipating energy due to the main flow turbulence decreases with an increasing the cylinder temperature. Then, the local temperature of the vortex also decreases due to the turbulence motion. As the results, the vortex frequency-decreasing rate due to the cylinder heating in the turbulent crossflow becomes 1/2 compared with the laminar case.

AB - Karman vortex structure behind a highly heated cylinder in a turbulent crossflow has been studied experimentally. The surface temperature of the cylinder is set up to 800°C. The Reynolds number based on the cylinder diameter is 750. For the heated cylinder set in the turbulent crossflow, the Karman vortex street can be clearly observed as the cylinder temperature is increased. Since the local temperature of the generated vortex is remarkably high compared with the main (low, the Karman vortex dissipating energy due to the main flow turbulence decreases with an increasing the cylinder temperature. Then, the local temperature of the vortex also decreases due to the turbulence motion. As the results, the vortex frequency-decreasing rate due to the cylinder heating in the turbulent crossflow becomes 1/2 compared with the laminar case.

KW - Fluid mechanics

KW - Forced convection

KW - Heat transfer

KW - Kantian vortex

KW - Local kinematic viscosity

KW - Particle image velocimetry

KW - Strouhal number

KW - Turbulent flow

KW - Vortex

KW - Wake

UR - http://www.scopus.com/inward/record.url?scp=29144505772&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=29144505772&partnerID=8YFLogxK

M3 - Article

VL - 67

SP - 1219

EP - 1226

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 657

ER -