Control of flow dynamics around a cylinder using sweeping jets DOI Open Access
Guang Chen, Bo Chen, Xiaobai Li

и другие.

Physics of Fluids, Год журнала: 2025, Номер 37(3)

Опубликована: Март 1, 2025

Flow control of cylinders aimed at drag reduction or vibration suppression has been widely studied. Sweeping jet is a novel flow method that applied to airfoil and other bluff bodies. This paper numerically investigates the effects sweeping jets on cylinder Reynolds number 5 × 104 using large Eddy simulation. Various parameters such as angle, momentum coefficient, arrangement configuration fluidic oscillators are examined for their influence effectiveness. The results demonstrate significantly reduce cylinder's drag, mitigate lift fluctuations, suppress vortex shedding, extend length recirculation region. optimal angle 70°, coefficient 3.4 10−3, reaches maximum 47%, while standard deviation decreases by 92.2%. As increases, factor (defined ratio reduced baseline drag) rises. However, when exceeds 10-3, rate significantly, accompanied changes in wake pattern. Besides, density also plays crucial role Furthermore, interaction between incoming examined. upstream separation point exchange with boundary layer, enhancing stability suppressing separation. closer point, more effective suppression.

Язык: Английский

Control of flow dynamics around a cylinder using sweeping jets DOI Open Access
Guang Chen, Bo Chen, Xiaobai Li

и другие.

Physics of Fluids, Год журнала: 2025, Номер 37(3)

Опубликована: Март 1, 2025

Flow control of cylinders aimed at drag reduction or vibration suppression has been widely studied. Sweeping jet is a novel flow method that applied to airfoil and other bluff bodies. This paper numerically investigates the effects sweeping jets on cylinder Reynolds number 5 × 104 using large Eddy simulation. Various parameters such as angle, momentum coefficient, arrangement configuration fluidic oscillators are examined for their influence effectiveness. The results demonstrate significantly reduce cylinder's drag, mitigate lift fluctuations, suppress vortex shedding, extend length recirculation region. optimal angle 70°, coefficient 3.4 10−3, reaches maximum 47%, while standard deviation decreases by 92.2%. As increases, factor (defined ratio reduced baseline drag) rises. However, when exceeds 10-3, rate significantly, accompanied changes in wake pattern. Besides, density also plays crucial role Furthermore, interaction between incoming examined. upstream separation point exchange with boundary layer, enhancing stability suppressing separation. closer point, more effective suppression.

Язык: Английский

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