Direct Numerical Simulation of Jet Actuators for Boundary Layer Control
The paper presents a method to perform direct numerical simulations (DNS) of a jet actuator flow inside a turbulent flat plate boundary layer (TBL). A structured finite differencemethod is used for the simulations. The numerical scheme is adapted to account for the large scale differences both in geometric and fluid dynamic aspect. Analytical mesh transformations have been implemented to resolve the jet orifice. Suitable boundary conditions are established to model the jet flow. Numerical stability has been added by implementing a compact filter scheme. The TBL baseflow is generated by mimicing experimental approaches and direct simulation of the laminar-turbulent transition process. Simulations of a jet actuator configuration perturbing the turbulent baseflow have been undertaken and the results are evaluated.
KeywordsDirect Numerical Simulation Turbulent Boundary Layer Spanwise Direction Longitudinal Vortex Boundary Layer Control
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