Effects of the synthetic jet on the flow field and heat transfer over a surface-mounted square rib

Shantanu, _; Dutta, Sushanta

doi:10.1016/j.expthermflusci.2022.110708

Cited by 8 publications

(1 citation statement)

References 30 publications

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“…The symmetric excitations of synthetic jets can even transform the vortex formation and shedding in the wake of circular cylinders from asymmetric mode to symmetric mode, which leads to a significant decrease in the mean drag coefficients and zero mean and fluctuating lift coefficients (Wang et al 2016(Wang et al , 2019b. In addition, synthetic jet actuators could be further miniaturized with the development of microelectromechanical systems technology, which is quite beneficial for internal, accurate and real-time control of VIV (Dutta and Shantanu 2022).…”

Section: Introductionmentioning

confidence: 99%

The influence of reduced velocity on the control of two-degree-of-freedom vortex induced vibrations of a circular cylinder via synthetic jets

Wang¹,

Yu²,

Sun³

et al. 2022

Fluid Dyn. Res.

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A two-dimensional numerical study is conducted to investigate the influence of the reduced velocity on two-degree-of-freedom VIVs of a circular cylinder controlled by synthetic jets ejected in horizontal and vertical directions (β = 0° and β = 90°). The Reynolds number is constant at Re = 150, and the reduced velocity varies in the range of 2.5 and 15 (U* = 2.5-15). The mass ratio of the circular cylinder is 2,0, and the in-flow to the cross-flow natural frequency ratio equals 1.0 (fnx/fny = 1.0). The oscillation characters, hydrodynamic forces and vortex shedding of circular cylinders with or without synthetic jets control are analyzed and compared. The results indicate that synthetic jets ejected in vertical direction (β = 90°) can intensify both in-flow and cross-flow oscillations of the circular cylinder in the whole reduced velocity range, the vortex shedding of the controlled case (β = 90°) becomes complicated even unstable with the reduced velocity increasing. Synthetic jets ejected in horizontal direction (β = 0°) have excellent performance on suppressing the cross-flow oscillation of the circular cylinder in the whole reduced velocity range. When U* ≥ 8.0, the in-flow oscillation of the circular cylinder can even be intensified by synthetic jets ejected in horizontal direction (β = 0°).

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Section: Introductionmentioning

confidence: 99%