Interference between two cylinders in a uniform stream

Y. Zhou, R. M.C. So, H. G. Xu, W. Jin

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


The flow field and structural vibrations of two side-by-side cylinders in a uniform cross flow were measured simultaneously in an effort to understand the interference effects of such a flow configuration. A single hot-wire was used to measure the velocity field, while the lateral structural responses were measured on one cylinder only using an optical fibre Bragg grating (FBG) sensor and a laser vibrometer. These measurements were compared with those obtained for a single cylinder. It was found that the fluctuating bending displacement Y measured by the laser vibrometer, when small, is linearly related to the axial strain ε obtained by the FBG sensor. As the cylinder spacing decreases, the strain-displacement relationship remains linear, but the slope changes as a result of interference between the cylinders. When the spacing is reduced to 1.13 cylinder diameter, the two cylinders act like a single structure. Furthermore, a prominent peak in the rms values of ε and Y occurs near the reduced velocity U(r) ~ 10; tripling the peak values measured at U(r) ~ 5. This could be attributed to the combined effects of resonance and interference between the cylinders.

Original languageEnglish
Title of host publicationProceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference, Melbourne, Australia, 13-18 December 1998 (Volume 2)
EditorsMC Thompson, K Hourigan, MC Thompson, K Hourigan
PublisherMonash University
Number of pages4
ISBN (Print)0732620449
Publication statusPublished - Dec 1998
EventProceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference - Melbourne, Australia
Duration: 13 Dec 199818 Dec 1998


ConferenceProceedings of the 1998 Thirteenth Australasian Fluid Mechanics Conference

ASJC Scopus subject areas

  • Engineering(all)


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