Numerical Simulation of Vectoring of a Primary Jet with a Synthetic Jet

The vectoring control of a primary jet with an averaged-zero-mass-flux synthetic jet is simulated using the two-dimensional Reynolds-averaged Navier-Stokes equations. The numerical results show the general agreement with the experiments. The vectoring effects of some parameters of the synthetic jet, such as the location, oscillating frequency, and velocity amplitude, are studied at two angles (0 and 60 deg) of the synthetic jet. The simulations show that in a certain range of velocity for the primary jet there exist optimal values for these parameters respectively, where the largest vectoring angle of the primary jet can be achieved with other parameters fixed. In addition, the synthetic jet can result in a much larger vectoring angle and vectoring force for the primary jet at 60 deg than that at 0 deg. It is hypothesized that the vectoring of a primary jet with a synthetic jet is mainly a combined effect of the local lower pressure and resistance caused by the synthetic jet.