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Titolo:
Classifications of flow pattern on three circular cylinders in equilateral-triangular arrangements
Autore:
Gu, ZF; Sun, TF;
Indirizzi:
Peking Univ, Dept Mech & engn Sci, State Key Lab Turbulence Res, Beijing 100871, Peoples R China Peking Univ Beijing Peoples R China 100871 ijing 100871, Peoples R China
Titolo Testata:
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
fascicolo: 6, volume: 89, anno: 2001,
pagine: 553 - 568
SICI:
0167-6105(200105)89:6<553:COFPOT>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
CROSS-FLOW; INTERFERENCE;
Keywords:
circular cylinders; pressure distribution; flow visualization; wake structure; flow pattern;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Gu, ZF Peking Univ, Dept Mech & engn Sci, State Key Lab Turbulence Res, Beijing 100871, Peoples R China Peking Univ Beijing Peoples R China 100871 00871, Peoples R China
Citazione:
Z.F. Gu e T.F. Sun, "Classifications of flow pattern on three circular cylinders in equilateral-triangular arrangements", J WIND ENG, 89(6), 2001, pp. 553-568

Abstract

Classifications of flow pat tern on three parallel circular cylinders in equilateral-triangular arrangements in cross uniform flow were investigated by wind tunnel tests. The spacing ratios were in the range of 1.7 less thanor equal to N/d less than or equal to 5.0, where N is the distance betweenthe centers of adjacent cylinders, d the diameter of the cylinders. Both the experiments of pressure distributions on three circular cylinders at Reynolds number 5.5 x 10(4) and flow visualizations at Reynolds number 1.4 x 10(4) were carried out. It shows that the angles of incident Bow strongly influence the flow patterns, and therefore the pressure distributions on any one of the cylinders. Due to the interference of the shear layers and/or wakes, the most complex features of pressure distributions can be found on the cylinder located downstream. As for the different levels of interference regarding the influence of spacing ratio, mainly four different affected regions, i.e., effects of small, transition, medium, and larger spacing can be identified. Within the small spacing ratios, i.e., 1.7 less than or equalto N/d less than or equal to 2.2, three basic types of interference can beclassified. The three basic types are interference of proximity, shear layer reattachment and wake. Furthermore, seven steps of Bow pattern can be subdivided as the angles of incident flow vary from 0 degrees to 60 degrees. (C) 2001 Elsevier Science Ltd. All rights reserved.

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Documento generato il 06/04/20 alle ore 02:02:49