Spanwise correlation behavior of vortex-shedding lift force on a flat closed box deck

Le Dong Zhu, Xiao Liang Meng, You Lin Xu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Spanwise correlation behavior of both total vertical vortex-induce lift (VIL) and pure vertical vortex-shedding lift (VSL) on a flat closed-box deck under both still and vortex-induced resonance (VIR) states was investigated via a pressure measurement wind tunnel test of spring-suspended sectional model constructed at a large scale of 1/20. The correlation coefficients of VSL on the still deck model and those of total VIL on the deck model under VIR state were calculated directly based on the measured fluctuating lift forces, whilst the correlation coefficients of VSL on the deck model under VIR state were extracted from those of total VIL according to an approximate relationship between the two correlation coefficients established in this study. The results show that the spanwise correlation of total VIL can be greatly intensified by the VIR because of the existence of a large portion of vortex-induced self-excited lift (VISEL) contained in the total VIL. On the other hand, the spanwise correlation of VSL under VIR state is much weaker than that of total VIL as well as that of VSL under still state at same wind speeds. Furthermore, the relationship between the spanwise correlation of VIL or VSL and the VIR response is quite complicated. The most violent VIR, the most correlated VIL and the most correlated VSL are not corresponding to each other.

Original languageEnglish
Title of host publicationProceedings of the 8th Asia-Pacific Conference on Wind Engineering, APCWE 2013
EditorsNagesh R. Iyer, Prem Krishna, Rajan S. Selvi, P. Harikrishna
PublisherResearch Publishing Services
Pages419-429
Number of pages11
ISBN (Electronic)9789810780111
DOIs
Publication statusPublished - 1 Jan 2013
Event8th Asia-Pacific Conference on Wind Engineering, APCWE 2013 - Chennai, India
Duration: 10 Dec 201314 Dec 2013

Publication series

NameProceedings of the 8th Asia-Pacific Conference on Wind Engineering, APCWE 2013

Conference

Conference8th Asia-Pacific Conference on Wind Engineering, APCWE 2013
CountryIndia
CityChennai
Period10/12/1314/12/13

Keywords

  • Flat closed box deck
  • Spanwise correlation
  • Sprig-suspended sectional model
  • Total vortex-induced lift
  • Vortex-induced resonance
  • Vortex-shedding lift
  • Wind tunnel test of pressure measurement

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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