希薄高分子溶液の円管内流れにおける摩擦損失と圧力変動特性

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タイトル別名
  • Drag Reduction and Pressure Fluctuation of Dilute Polymer Solutions in Pipe Flow.
  • キハク コウブンシ ヨウエキ ノ エンカンナイ ナガレ ニ オケル マサツ ソ

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Measurement of drag reduction and frequency analysis of the wall pressure fluctuation in pipe flow are carried out using dilute polymer solutions and aqueous detergent solutions in order to discuss the correlation between drag reduction and pressure fluctuation. Frequency analysis indicates that the power spectrum density of the pressure fluctuation of dilute polymer solutions is greater in the low-frequency region and less above 30[Hz] than that of water (solvent). Moreover, the level of pressure fluctuation in dilute polymer solutions is on the whole greater than that in water.

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