Study of Plasma Actuator Efficiency by Simulation of the Detached Flow Over a Half-Cylinder
2016 (English)Conference paper (Other academic)
In this paper, the effect of a numerical model for plasma actuators, in the form of single dielectric barrier discharge, is evaluated. One such plasma actuator is modeled by a steady body force distribution able to replicate the effect of the actuator in a quiescent environment without adding any significant complexity to the numerical simulations. This model is used in Large Eddy Simulations (LES) of the flow over a half-cylinder at a Reynolds number of 32000 , where the actuation is expected to yield a measurable drag reduction. The flow without actuation is first analyzed by mesh refinement and by evaluation of different flow quantities in order the validate the simulation results. Thereafter, the model is used to simulate two actuators placed on the half-cylinder one after another and at four locations chosen so that the mean separation point of the non-actuated flow lies betweenthe two actuators. It is determined that the actuation is able to achieve up to 10% of drag reduction, although this value decreases to 6% when the actuation location is moved.
Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2016.
plasma actuator, drag reduction, half-cylinder, LES, plasma model
IdentifiersURN: urn:nbn:se:kth:diva-191298DOI: 10.2514/6.2016-4084OAI: oai:DiVA.org:kth-191298DiVA: diva2:955899
8th AIAA Flow Control Conference
FunderSwedish Energy Agency, 34186-1
QC 201608292016-08-262016-08-262016-08-29Bibliographically approved