５角形ダクトから流出する噴流

抄録

The velocity measurements of the jet flow issuing from the pentagonal duct with and without the synthetic jet were performed by using hot wire probes and the constant temperature anemometer. The jet diffusion was investigated by analyzing the velocity distributions. In order to excite the share layer of the jet, the synthetic jet was spouted from the actuator set on the outside of a vertex of the duct exit at 45 degree angle with respect to flow direction. As a result, it has been found that the jet diffusion adding the synthetic jet with high frequency in xOz -plane is promoted due to the turbulent intensity becomes large in the vicinity of the jet center axis in the upstream region and in the shear layer in the downstream region.