Summary of the 2004 Cfd Validation Workshop on Synthetic Jets and Turbulent Separation Control

A CFD validation workshop for synthetic jets and turbulent separation control CFD VAL was held in Williamsburg Virginia in March Three cases were inves tigated synthetic jet into quiescent air synthetic jet into a turbulent boundary layer cross ow and ow over a hump model with no ow control steady suction and oscilla tory control This paper is a summary of the CFD results from the workshop Although some detailed results are shown mostly a broad viewpoint is taken and the CFD state of the art for predicting these types of ows is evaluated from a general point of view Overall for synthetic jets CFD can only qualitatively predict the ow physics but there is some uncertainty regarding how to best model the unsteady boundary conditions from the experiment consistently As a result there is wide variation among CFD results For the hump ow CFD as a whole is capable of predicting many of the particulars of this ow provided that tunnel blockage is accounted for but the length of the separated region compared to experimental results is consistently overpredicted