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.
Numerical and Experimental Investigation of an Annular Jet Flow With Large Blockage
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division March 20, 2003; revised manuscript received January 5, 2004. Associate Editor: M. V. O¨tu¨gen.
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Del Taglia, C., Blum, L., Gass , J., Ventikos, Y., and Poulikakos, D. (July 12, 2004). "Numerical and Experimental Investigation of an Annular Jet Flow With Large Blockage ." ASME. J. Fluids Eng. May 2004; 126(3): 375–384. https://doi.org/10.1115/1.1760533
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