抄録
The unsteady flow oscillation caused by nozzle-edge interaction is analyzed by the discrete vortex method which has been used for an incompressible and moderately high Reynolds number flows as a simple numerical simulation method. Though some instability was caused by the original method because of the oscillation flow, the approaches using a sub-element method and a second-order time-marching are suitable in this case. Calculation results show that the wall at the nozzle exit performs an important role in the nozzle-edge interaction.
