Journal of Theoretical and Applied Vibration and Acoustics

Journal of Theoretical and Applied Vibration and Acoustics

Investigation of different configurations of flow suction and blowing on the vibration behavior of a sprung cylinder with a square cross-section

Document Type : Research Article

Authors
Abolfazl Mohammadebrahim 1
Mohammad Reza Barzan 2
Amir Hossein Rabiee 1
1 Assistant Professor, Department of Mechanical Engineering, Arak University of Technology, Arak, IRAN
2 M.Sc. Student, Department of Mechanical Engineering, Arak University of Technology, Arak, IRAN
10.22064/tava.2024.2007102.1225
Abstract
The vortex shedding from a bluff body can provoke structural vibrations known as flow-induced vibrations (FIV), which characterize an intrinsic phenomenon in the design of cylindrical structures. There are numerous passive and active methods to suppress FIV, among which suction and/or blowing on a cylinder surface is one of the most common approaches. In this work, different configurations of simultaneous suction and blowing are considered at two different Reynolds numbers corresponding to the galloping and frequency synchronization ranges. The parameters studied include the number of slots for suction and blowing, their length, and the velocity of the sucked and blown flow. The design of experiments method (DOE) is used to find the required simulation elements. The simulation results show that the dominant parameter in the reduction of galloping and vortex-induced oscillations and mass flow rate is the flow velocity in the areas of blowing and sucking. In addition, regression analysis is used to derive a relationship between various influencing parameters and performance parameters.

Highlights

  • Flow-induced vibrations of elastically-mounted square cylinder is investigated.
  • Vibration control system utilizing flow suction and blowing approach is introduced.
  • Different configurations of suction and blowing are examined.
  • Design of experiments method is used to find the required elements for simulations.
  • Results show the important parameters for reduction of galloping and VIV.

Keywords
Flow-induced vibration
Vortex-induced vibration
Galloping
Lock-in
Fluid-Solid Interaction (FSI)
Suction
Blowing
Square cylinder
Subjects