Turbulent Structure in a Vortex Wake Shed from an Inclined Circular Cylinder.

Hayashi, Tsutomu; Yoshino, Fumio; Waka, Ryoji; Tanabe, Seiichi; Kawamura, Takahiro

doi:10.1299/kikaib.58.297

Cited by 6 publications

(2 citation statements)

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“…Figure 10 shows the comparison of the sound pressure level between the experiments and estimation with the Fukano's method that the correlation length and the velocity fluctuation are used by the results of the numerical simulation. The SPL is obtained by Fukano 9 with below (2) Cross correlation,…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Relationship between Aeolian tone and Wake Vortex from Inclined Flat Blade (Characteristics of Vortex Shedding in Spanwise Direction)

Yoshitake

Hayashi

Sasaki

et al. 2009

JFST

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The three dimensional structure of the wake vortex was investigated in relating to the aeolian tone from the inclined blade. It was pointed out that the aeolian tone is largest not at zero, but at ten degree of the inclined angle. The correlation length of the wake vortex in span becomes large at small inclined angles. The large scale structures of the wake vortex are generated in zero and ten degree of inclined angle. The shape of the structure is influenced with the span-wise velocity in the dead air region. There are small scale spots of the pressure fluctuation at the trailing edge. The spots are interacted each other and make a large cluster of the pressure fluctuation. It is proposed that the scale of it is decided by the timing of the wake vortex formation. And the shape of the wake vortex structure is closely related with the scale of it. The correlation length of the wake vortex is calculated from the shape of the structure. The estimation of aeolian tone by using the length with Fukano's model is well coincided to experiments.

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Section: Resultsmentioning

confidence: 99%

“…Some reports were presented for the inclined cylinder to make clear the effects of the three-dimensional characteristics to the wake vortex [7][8][9][10] . It was pointed out that the flow turned to the direction normal to the circular cylinder.…”

Section: Introductionmentioning

confidence: 99%