Numerical study of flow separation control over a circular hump using synthetic jet actuators
Source abstract
Abstract
This study deals with the wall resolved Unsteady Reynolds-Averaged Navier–Stokes (URANS) simulation of boundary layer flow separation over a circular hump model and its active control. An array of Synthetic Jet Actuators (SJAs) is implemented in the hump model to introduce a train of vortex rings into the boundary layer to control flow separation. The OpenFOAM solver is used to numerically simulate and analyze the fluid flow using the k–ω shear stress transport model. Hot wire anemometry and particle image velocimetry measurements are carried out to evaluate the accuracy of the URANS technique as well as the effectiveness of SJAs by comparing numerical predictions to experimental data. The time-averaged results are in a good agreement with experimental results and demonstrate a successful application of SJAs to delay the flow separation by the interactions of vortical structures with the separated shear flow. The three-dimensional simulation also reveals that near wall coherent flow structures (streamwise and spanwise vortices) are responsible for the wall shear stress components. The results can be used to better understand the performance of SJAs and to further improve future actuator configurations.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Plasma and Flow Control in Aerodynamics · Fluid Dynamics and Turbulent Flows · Lattice Boltzmann Simulation Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Computing and Engineering, University of Huddersfield 1 , Huddersfield HD1 3DH, United Kingdom
School of Engineering, University of Leicester 2 , Leicester LE1 7RH, United Kingdom
Funding
Engineering and Physical Sciences Research Council
References (59)
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