Experimental Investigation of Turbulent Cross-flow in a Staggered Tube Bundle with Wavy Cylinders

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F22%3APU145403" target="_blank" >RIV/00216305:26110/22:PU145403 - isvavai.cz</a>

Result on the web

<a href="https://www.jstage.jst.go.jp/article/ijfms/15/3/15_344/_article/-char/ja" target="_blank" >https://www.jstage.jst.go.jp/article/ijfms/15/3/15_344/_article/-char/ja</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5293/IJFMS.2022.15.3.344" target="_blank" >10.5293/IJFMS.2022.15.3.344</a>

Result language

angličtina

Original language name

Experimental Investigation of Turbulent Cross-flow in a Staggered Tube Bundle with Wavy Cylinders

Original language description

This paper presents the results of an investigation on the effects of wavy cylindrical tubes on the turbulent cross-flow in a staggered tube bundle arrangement with transverse and longitudinal pitch-to-diameter ratios of 3.8 and 2.1, respectively. Two models of staggered tube bundles equipped with wavy cylinders are tested; the Model-A having a wavelength ratio (λ/Dm= 2) corresponding to a wave steepness (a/λ = 0.1) and the Model-B having (λ/Dm= 1) corresponding to (a/λ = 0.2).Experimental measurements were performed using a subsonic wind tunnel to study and compare the flow characteristics of the new configuration of cylindrical tubes with that of a similar arrangement with smooth cylinders for Reynolds numbers ranging from 0.5×104 to 2×104 based on the mean tube diameter and the free stream velocity. Experimental results show that the circumferential minimum pressure coefficients for wavy tube bundles are greater than at the bundle with smooth cylinders. As a result, the lift forces of wavy tube bundles are suppressed and a significant drag reduction is observed up to 20% for both wavy models. This continuous reduction of the drag force becomes larger with the increase of Reynolds number. © 2022, Turbomachinery Society of Japan. All rights reserved.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

International Journal of Fluid Machinery and Systems

ISSN

1882-9554

e-ISSN

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Volume of the periodical

15

Issue of the periodical within the volume

3

Country of publishing house

KR - KOREA, REPUBLIC OF

Number of pages

12

Pages from-to

344-355

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85136251968