High-frequency rotary oscillations control of flow around cylinder at Re = 1.4×105

All-Russian Conference with the School for Young Scientists “Thermophysics and Physical Hydrodynamics –2016”

Palkin, E.^1,2 ; Hadiabdi, M.^3 ; Hanjali, K.^2,4

Institute of Thermophysics, SB, RAS, Novosibirsk, Russia^1

Novosibirsk State University, Novosibirsk, Russia^2

International University of Sarajevo, Sarajevo, Bosnia and Herzegovina^3

Delft University of Technology, Delft, Netherlands^4

关键词: Axis of symmetry;    Drag and lift coefficients;    Drag and lift forces;    External forcing;    Flow around cylinder;    High amplitudes;    High frequency HF;    URANS simulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/754/6/062006/pdf
DOI  :  10.1088/1742-6596/754/6/062006

来源: IOP

【 摘 要 】

We perform a series of URANS simulations of the flow over a rotary oscillating cylinder at Re = 1.4 105to study the possible reduction of the drag and lift forces acting on the body when the rigid wall is rotary oscillating around the axis of symmetry. Two parameters of the external forcing are varied, i.e. the amplitude of rotation and the frequency. We find that the high-frequency and relatively high-amplitude forcing leads to the drag reduction of 78% compared to the non-rotating case. The oscillations (rms) of drag and lift coefficients are also significantly reduced.