Volumetric Reduced-Order Models of Zero-Net Mass-Flux Synthetic Jet Actuators

presentation made at the 2018 AIAA Aviation Forum, Atlanta, USA

In the framework of an optimization study based on a multi-objective optimization formula- tion, the consideration of optimization parameters such as the actuator location and the outlet design implies a re-meshing procedure that add complexity (even if the actuator is modeled with simple boundary conditions at the jet orifice exit since, locally, the re-mesh is still required). This strongly impacts the global computational cost, in particular if the considered geometry is complex. In this paper we propose an alternative method to model ZNMF synthetic jet actuators through the implementation of volumetric reduced-order models of ZNMF synthetic jet actuators as an additional source terms, in the form of body forces on given local control volumes corresponding to the actual locations of the actuators. This approach is promising as it allows to skip re-meshing procedures (velocity inlet boundaries or full synthetic jet actu- ator modeling) by directly plugging the volumetric source terms at appropriate locations and, consequently, save a considerable computational time during the optimization process.

10.2514/6.2018-3058