壁面近傍での二次流れによる一次噴流の方向制御

抄録

Studies on jet direction control methods without variables or moving parts have been drawing attention. Several attempts have been made to control the direction of the primary jet using a secondary flow with a Coanda surface. In this study, the direction of the primary jet was controlled by applying a synthetic jet with the Coanda surface as the secondary flow. Specifically, the effect of the rigid boundary on the deflection characteristics of the jet was investigated experimentally by applying flow visualization. In this study, the geometric shape was constant. Additionally, the dimensionless frequency, momentum ratio, step length, and offset ratio were used as experimental parameters. The results demonstrated that the deflection characteristics of the jet near the wall surface depend on both the offset ratio of the wall surface as well as on the momentum ratio between the primary and secondary jets and the dimensionless frequency of the synthetic jet.