On the passive control of aeroacoustics noise behind a square cylinder

Abbasi, Sarallah; Souri, Maryam

doi:10.1007/s40430-021-02797-w

Cited by 8 publications

(2 citation statements)

References 33 publications

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“…As it was mentioned earlier, to predict the noise in this study, the two-dimensional solver with turbulence model is considered the same as previous studies. Due to the lower computational cost of two-dimensional models compared to 3D models (Cox et al 1998, Khorrami et al 2007, Liu et al 2015, Liu et al 2018and Abbasi and Souri 2021b) and weaker noise estimation of the two-dimensional models, they are still more favorable for researchers (Ganta et al 2019). In Fig.…”

Section: Fig1 Schematic Diagram Of the Computational Domain And The Boundary Conditionsmentioning

confidence: 99%

Effects of Blowing Location on Aeroacoustics of the Flow over a Circular Cylinder

2022

JAFM

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This study investigated the effect of blowing on vortex shedding and aerodynamic noise due to flow over a circular cylinder. The flow simulation is performed by the URANS equations using k-ω-SST turbulence model. Calculations of the aerodynamic noise are performed through F-fowcs Williams-Hawkins analogy. The cylinder's cross-section with a diameter of D=16mm, and the blowing jet is applied through slot windows that are located on the cylinder back surface. In this study, three positions for slot windows are considered. Verification of the numerical results is confirmed by comparing numerical results with the reported experimental ones (Uncontrolled case). The results showed that the optimal blowing position could reduce noise, lift coefficient, and drag coefficient; this result occurs for a slot window located near the cylinder horizontal axis of symmetry. On the other hand, if the blowing slot is located at the cylinder symmetric vertical axis, the aerodynamic noise increases by approximately 4 dB. In this case, the average lift and drag fluctuations are increased by more than 200%. The present study gives a new idea to the reduction of noise of the single body systems.

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Section: Fig1 Schematic Diagram Of the Computational Domain And The Boundary Conditionsmentioning

confidence: 99%

Effects of Blowing Location on Aeroacoustics of the Flow over a Circular Cylinder

2022

JAFM

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“…, where F x is the drag force in the streamwise direction. Abbasi and Souri [28] conducted numerical investigations on the effects of the downstream attached splitter plate over a square cylinder. They found that splitter length remarkably reduced the drag force for 0.2 ≤ l/D ≤ 2 at Re = 33,000.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of reduction of fluid forces acting on a square cylinder using a control plate

Zia-ul-Islam

Shams-ul-Islam

Zhou

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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A numerical study on the effects of control plate on the fluid force reduction on a square cylinder has been carried out using lattice Boltzmann method where a configuration of a square cylinder with upstream control plate is studied. In the present computations we have studied the important flow characteristics for 0.1 ≤ l/w ≤ 1 and 1 ≤ g/D ≤ 10. The effects of the l/w and g/D on force reduction, flow separation and vortex shedding frequency have been studied with Reynolds number focused on 150. Vorticity structures, vortex shedding frequency and fluctuating forces and time-mean are presented and discussed. It was found that considerable change in the wake structure and fluid forces depending on the values of l/w and g/D. The numerical results show that there exists an optimum position where the force coefficients acting on the main square cylinder attains their minimum values. At the optimum position, the mean drag coefficient is reduced by 139.3%. Four different flow regimes were identified in this study at different g/D for selected range of l/w. The negative values of drag coefficient for the main square cylinder are also found for different combinations of l/w and g/D.

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Fluid flow control around unequal cylinder spacing behind three side-by-side cylinders

Shams-ul-Islam,

Cham,

Zia-ul-Islam

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

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On the passive control of aeroacoustics noise behind a square cylinder

Cited by 8 publications

References 33 publications

Effects of Blowing Location on Aeroacoustics of the Flow over a Circular Cylinder

Effects of Blowing Location on Aeroacoustics of the Flow over a Circular Cylinder

Numerical study of reduction of fluid forces acting on a square cylinder using a control plate

Fluid flow control around unequal cylinder spacing behind three side-by-side cylinders

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