Numerical and experimental investigation of an annular jet flow with large blockage

Christian Del Taglia, Lars Blum, Jürg Gass, Yiannis Ventikos, Dimos Poulikakos

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Unsteady 3-D numerical simulations and 3-D LDA measurements of an annular jet with a blockage ratio of 0.89 and Reynolds number 4400 are presented. At these flow conditions, the flow inside of the recirculation zone is asymmetric, with a preferential direction. Very good predictions of the velocity fluctuation values are achieved with the unsteady simulation technique in the same region, as the fluctuations are mainly large scale, structure dominated. A frequency near to 10 Hz is identified in the simulations, which is attributed to the principal shedding behavior of the vortical structures.

Original languageEnglish
Pages (from-to)375-384
Number of pages10
JournalJournal of Fluids Engineering, Transactions of the ASME
Issue number3
Publication statusPublished - May 2004
Externally publishedYes

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