S055023 非イオン性界面活性剤水溶液の抵抗低減効果に及ぼすポンプ稼働時間の影響([S05502]流れの抵抗低減(2))

概要

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There are a few studies on the drag-reducing effects of nonionic surfactant solutions which are non-toxic and biodegradable, while a lot of investigations for cationic surfactant solutions have been performed so far. We investigated the drag-reducing effects of nonionic surfactant (oleyldimethylamineoxide) solutions by measuring the pressure drop in the circuit pipe flow. The maximum drag reduction ratio at the solution concentration C = 100 ppm was about 70 %, which did not depend on solution temperature T = 10 to 40 -C. At C = 100 ppm, T = 20 -C, the drag-reducing effect disappeared within 48 hours at the Reynolds number based on dynamic viscosity of water Rew 10000, while it disappeared within 24 hours at Rew> 20000.
一般社団法人日本機械学会の論文
2011-09-11