G145 管内乱流を上流にもつ噴流場に対するPOD解析(G-14 せん断流れ(4),一般講演)

概要

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The turbulence characteristics of air jets issuing from turbulent duct flow were investigated using a hot wire anemometry. The statistics of turbulence that include turbulence intensity show that the strong entrainment that bring the surrounding fluid at rest into the jet around the early development of the jet and these values saturate to the general turbulence values downstream. The POD analysis for the steamwise velocity shows that the jet flow has both local and global structures. In the region close to the jet exit, the jet flow has dominant local structure and it has dominant global structure downstream. These results suggest that the jet flow from the turbulent duct flow also has a large coherent structure except in the region close to the jet exit as well as a laminar jet.
日本流体力学会の論文
2004-08-09