Mode intermittence in a wake from two cylindersстатья
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Дата последнего поиска статьи во внешних источниках: 16 февраля 2018 г.
Аннотация:Near turbulent intermittent wake from a set contained of two cylinders is investigated in the case of moderate Reynolds number when distinguished wake global modes are competing. This study is performed within the framework of the reduced-order oscillator model where each von Karman vortex street behind a cylinder is modeled by an oscillator of van der Pole type. First distinguished feature of the model is using a nonlinear form in model equations for treating of these streets interaction. The second feature is that the oscillator equations are generalized for explicit dependence of the oscillation frequency on oscillation amplitude. Dependence of the global modes frequencies of oscillation on the model parameters is adduced. An example of attraction domain for an asymmetric wake global mode is studied.