Effect of spacing between two adjoining square cylinders on flow around two-dimensional square cylinder row supported by elastic plate springs

Shiki Okamoto, Fujio Ishii, Masahiko Aichi, Toshiyuki Masuda, Yoko Yamanishi

Research output: Contribution to journalArticle

Abstract

In this paper we describe the effect of spacing between two adjoining square cylinders on flow around two-dimensional square cylinder row supported by plate springs. The experiment was carried out in an N. P. L. blow-down-type wind tunnel with a working section of 500 mm × 500 mm× 2 000 mm, and a Reynolds number of 9.4 × 103. The frequency of vortex shedding from the square cylinder, the displacement of the vibrating square cylinder, and the time mean and fluctuating surface pressure distributions on the square cylinder were measured. Consequently it was found that (i) vortex shedding from square cylinders occurs in the range of spacing ratio S/D≥1.7, while there is two patterns regarding the existence of vortices shedding from square cylinders in the range of 1.7 ≤S/D≤2.5, (ii) the displacement of vibrating cylinder due to the shedding vortices attains maximum at S/D=3, (iii) the fluctuating pressure distribution on the surface and fluctuating lift by frequency of shedding vortices become largest at S/D=3.

Original languageEnglish
Pages (from-to)25-33
Number of pages9
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume64
Issue number617
Publication statusPublished - 1998 Jan
Externally publishedYes

Fingerprint

elastic plates
Vortex shedding
spacing
vortex shedding
Pressure distribution
pressure distribution
Wind tunnels
Reynolds number
wind tunnels
Experiments

Keywords

  • Displacement
  • Flow-induced vibration
  • Fluid force
  • Interference
  • Pressure distribution
  • Spacing
  • Square cylinder
  • Vortex

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

Effect of spacing between two adjoining square cylinders on flow around two-dimensional square cylinder row supported by elastic plate springs. / Okamoto, Shiki; Ishii, Fujio; Aichi, Masahiko; Masuda, Toshiyuki; Yamanishi, Yoko.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 64, No. 617, 01.1998, p. 25-33.

Research output: Contribution to journalArticle

@article{d878fa24052c40d6b46e54d85d045f8d,
title = "Effect of spacing between two adjoining square cylinders on flow around two-dimensional square cylinder row supported by elastic plate springs",
abstract = "In this paper we describe the effect of spacing between two adjoining square cylinders on flow around two-dimensional square cylinder row supported by plate springs. The experiment was carried out in an N. P. L. blow-down-type wind tunnel with a working section of 500 mm × 500 mm× 2 000 mm, and a Reynolds number of 9.4 × 103. The frequency of vortex shedding from the square cylinder, the displacement of the vibrating square cylinder, and the time mean and fluctuating surface pressure distributions on the square cylinder were measured. Consequently it was found that (i) vortex shedding from square cylinders occurs in the range of spacing ratio S/D≥1.7, while there is two patterns regarding the existence of vortices shedding from square cylinders in the range of 1.7 ≤S/D≤2.5, (ii) the displacement of vibrating cylinder due to the shedding vortices attains maximum at S/D=3, (iii) the fluctuating pressure distribution on the surface and fluctuating lift by frequency of shedding vortices become largest at S/D=3.",
keywords = "Displacement, Flow-induced vibration, Fluid force, Interference, Pressure distribution, Spacing, Square cylinder, Vortex",
author = "Shiki Okamoto and Fujio Ishii and Masahiko Aichi and Toshiyuki Masuda and Yoko Yamanishi",
year = "1998",
month = "1",
language = "English",
volume = "64",
pages = "25--33",
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 = "617",

}

TY - JOUR

T1 - Effect of spacing between two adjoining square cylinders on flow around two-dimensional square cylinder row supported by elastic plate springs

AU - Okamoto, Shiki

AU - Ishii, Fujio

AU - Aichi, Masahiko

AU - Masuda, Toshiyuki

AU - Yamanishi, Yoko

PY - 1998/1

Y1 - 1998/1

N2 - In this paper we describe the effect of spacing between two adjoining square cylinders on flow around two-dimensional square cylinder row supported by plate springs. The experiment was carried out in an N. P. L. blow-down-type wind tunnel with a working section of 500 mm × 500 mm× 2 000 mm, and a Reynolds number of 9.4 × 103. The frequency of vortex shedding from the square cylinder, the displacement of the vibrating square cylinder, and the time mean and fluctuating surface pressure distributions on the square cylinder were measured. Consequently it was found that (i) vortex shedding from square cylinders occurs in the range of spacing ratio S/D≥1.7, while there is two patterns regarding the existence of vortices shedding from square cylinders in the range of 1.7 ≤S/D≤2.5, (ii) the displacement of vibrating cylinder due to the shedding vortices attains maximum at S/D=3, (iii) the fluctuating pressure distribution on the surface and fluctuating lift by frequency of shedding vortices become largest at S/D=3.

AB - In this paper we describe the effect of spacing between two adjoining square cylinders on flow around two-dimensional square cylinder row supported by plate springs. The experiment was carried out in an N. P. L. blow-down-type wind tunnel with a working section of 500 mm × 500 mm× 2 000 mm, and a Reynolds number of 9.4 × 103. The frequency of vortex shedding from the square cylinder, the displacement of the vibrating square cylinder, and the time mean and fluctuating surface pressure distributions on the square cylinder were measured. Consequently it was found that (i) vortex shedding from square cylinders occurs in the range of spacing ratio S/D≥1.7, while there is two patterns regarding the existence of vortices shedding from square cylinders in the range of 1.7 ≤S/D≤2.5, (ii) the displacement of vibrating cylinder due to the shedding vortices attains maximum at S/D=3, (iii) the fluctuating pressure distribution on the surface and fluctuating lift by frequency of shedding vortices become largest at S/D=3.

KW - Displacement

KW - Flow-induced vibration

KW - Fluid force

KW - Interference

KW - Pressure distribution

KW - Spacing

KW - Square cylinder

KW - Vortex

UR - http://www.scopus.com/inward/record.url?scp=71249138997&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=71249138997&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:71249138997

VL - 64

SP - 25

EP - 33

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 - 617

ER -