1152 周期配列ブロックを有する管路内の非ニュートン流体乱流計測

概要

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An experimental study of development turbulent flow in a rectangular duct with staggered blocks for non-Newtonian fluid (0.1 wt.% CMC solution) has been carried out by using Laser-Doppler velocimeter. If has been well known that, addition of small amount of a polymer to water causes frictional drag reduction. After this phenomenon has been confirmed in a pipe flow and this rectangular duct flow, the measurement has been performed in the flow region between number 7 block and number 8 block for Newtonian (water) and non-Newtonian (0.1 wt.% CMC solution) fluids under the condition of the same flow rate (U_b=0.322m/s). As a result of this experimental study, it has made clear that the peak of streamwise velocity's generated in the central and wall side regions similarly and similar separation-reattachment region is produced behind blocks for both of the fluids.
一般社団法人日本機械学会の論文
2002-09-20