Computational analysis of sweeping jet actuator using dynamic mode decomposition
Abstract
A sweeping jet actuator (SJA) is a self-sustaining, periodically oscillating device without involving any moving parts. SJA requires only pressurized fluid at the inlet to transfer momentum via the Coanda effect. As an active flow control device, SJA is a reliable option for suppressing aerodynamic flow separation. SJAs are integrated into series which eject bi-stable harmonic oscillation to suppress the separation bubble created downstream of the aerodynamic components. In this thesis, we analyzed the geometric variations of the SJA to combine with aerodynamic wings, and stabilizers using computational fluid dynamics (CFD). Based on high-fidelity CFD data, we further developed a reduced order model (ROM) using dynamic mode decomposition (DMD). The ROM solutions have been demonstrated to be successful in decreasing computational costs greatly with negligible loss in physical accuracy and therefore a proven alternative to existing methodologies for cost reduction. DMD algorithm provides the output of the SJA device that can be utilized as a boundary condition to decrease the numerical burden of simulating micro-scale structure in macro-scale models.
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- OSU Theses [15752]