22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-2.6.R1

NUMERICAL SIMULATION OF A SYNTHETIC JET ACTUATOR

C. Nae
INCAS – National Institute for Aerospace Research, Romania

Keywords: synthetic jets, cfd, flow control, mesh generation

Synthetic jet actuator is analyzed using unsteady compressible RANS CFD code . The analysis is made for both the actuator’s cavity and the surrounding domain. The actuator is considered as having a piston-like oscillatory moving bottom wall with a given amplitude and frequency. Computations are performed for the 2D case using moving grid and domain decomposition algorithms for the cavity region and the external flow. The numerical scheme used is based on explicit time marching and second order spatial accuracy. Turbulence is modeled using k-e model with a choice of wall laws or two layer approach. Domain discretisation is based on adapted unstructured meshes using Delaunay triangularization. Several similitude parameters are used for comparison with other numerical simulations and experimental data. Results are presented for the numerical simulation of the actuator using an imposed moving law for the bottom of the cavity. Also, influence in the surrounding field is analyzed, using apriori given velocity profile at the actuator exit.

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