2502 環状シンセティック・ジェット・アクチュエータによる噴流の形成(G05-1 噴流(1),G05 流体工学)  [in Japanese] 2502 Jet Flow Formation Using an Annular Synthetic Jet Actuator  [in Japanese]

A jet flow generated by an annular synthetic jet actuator was investigated experimentally by using a hot-wire anemometer. The mean and turbulent velocity profiles were measured at downstream from the actuator for various frequency and intensity of the alternating flow in the annular gap. The results indicate that the generated flow field is very similar to a circular jet and the jet formation depends on the stroke length of the alternating flow. The evaluated momentum of the synthetic jet increases as the intensity (rms velocity) of the alternating flow is increased. The momentum normalized by the intensity is well correlated with the stroke length, so it can be concluded that the momentum of the synthetic jet is governed by the intensity and stroke length of the alternating flow.