一様流中にある長方形断面柱に作用する変動流体力 : 完全はく離形角柱について

概要

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Experimental investigations on the characteristics of the fluctuating forces acting on rectangular cylinders with fully separated flow were carried out at a Reynolds number of 5.5×10^4. The widty-to-height ratio B/H of the section was varied from 0.3 to 2.5. Phase-averaged lift and drag forces were obtained in terms of phase-averaged surface pressure. The phase-averaged fluctuating lift and drag coefficients take the respective maximum values in the same tendency as that of the time-mean drag coefficients for the critical geometry of B/H=0.7. In addition, the torsional moment forces associated with the phenomenon of the vortex-induced flutter were discussed in detail based on the characteristic of the fluctuating pressure, whose frequency equals to the vortex shedding frequency, acting on the surfaces of the rectangular cylinders.
一般社団法人日本機械学会の論文
1989-08-25