初期乱れを考慮した拘束噴流に関する研究 : 第5報,ノズルアスペクト比の影響

概要

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The effects of the nozzle aspect ratio on the mean flow and the turbulent flow properties of the bounded jet were investigated experimentally. It was proposed to explain these effects using the large vortex which exists, as reported previously, on the plane normal to the main flow. Considering the streamwise decay of the momentum flux on the mid-plane, the approximate calculation was corrected in order to apply it to the flow having the various aspect ratios. In the case of the flow having a small aspect ratio, distributions of the turbulent flow properties such as the turbulence intensities, the auto-correlations and the power spectra of the velocity fluctuations are peculiar because of the effects of the boundary layer on and the entrainment through the relatively narrow bounding plates.
一般社団法人日本機械学会の論文
1988-12-25