Drag Reducing Effect of Surfactant Solution on a Piping System and its Application for Saving Energy Consumption

表面活性剂溶液对管道系统的减阻效果及节能应用

• 批准号: 17560154
• 负责人: MURAKAMI Koichi
• 金额: $ 2.2万
• 依托单位: Ehime University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17560154/
• 关键词: Surfactant Solution; Drag Reduction in Pining System; Rheology; Fluid Eneineerin

The purpose of our project is to clarify the flow mechanism of surfactant solution, which exhibits drastic drag reduction in a piping system. 'lb achieve this purpose, we made the experimental apparatus containing a straight circular cross sectional pipe and the bend with the curvature ratio (bend curvature divided by inner radius of pipe) of four, and conducted the investigation of rheological characteristics, pressure measurement, and WV measurement. Finally, we fried to explain the drug reducing effect relating with those results. These would to be valuable for an innovation of the new drug reduction technique. The result of the rheological characteristics investigation showed that our examining surfactant solution (LSP-01M) could also become the shear induced state(SIS)that was common in many surfactant solutions. In the experiment using a straight pipe, the developing process of the boundary layer was clarified in the case of surfactant solution. We also showed that the maximum dr … More ug reduction ratio exceeded over 70%, and that drug reduction effect did not completely disappear in the case of weight concentration of 50 ppm when increasing Reynolds number. The velocity distribution in the wall coordinate system was also provided. Velocity measurement were carried out in detail, and it was hind that the Reynolds shear stress, which is correlation of axial and radial velocity fluctuations, were suppressed by malting the symmetric distribution of the probability density function against outward interaction and ejection, inward interaction and sweep, respectively. It was also found that the apparent viscosity slightly apart from the wall coincided with that of SIS, and there was the region with smaller apparent viscosity adjacent to the wall. We explained the reason of suppression of Reynolds shear stress, utilizing this gradient of apparent viscosity. In the experiment using the bend, it was found that the disturbance induced by the bend could not vanish easily in the case of strong drag reduction, and that the existence of two regions with high and low velocities lasted until they made strong shear. We also found that there was little disturbance in the outer part of the bend. Less

本研究的目的是探讨表面活性剂溶液在管道系统中的流动机理。为了实现这一目的，我们制作了一个实验装置，该装置包括一个直的圆形横截面管道和曲率比（弯曲曲率除以管道内径）为4的弯曲，并进行了流变特性、压力测量和WV测量的研究。最后，对与这些结果相关的药物降压作用进行了解释。这对创新新的减毒技术具有重要意义。流变特性研究结果表明，所研究的表面活性剂溶液（LSP-01 M）也可以成为许多表面活性剂溶液中常见的剪切诱导态（SIS）。在直管实验中，阐明了表面活性剂溶液情况下边界层的发展过程。我们还表明， ...更多信息 μ g减少率超过70%，且当增加雷诺数时，在重量浓度为50 ppm情况下，药物减少效果并未完全消失。给出了壁面坐标系下的速度分布。详细地进行了速度测量，发现通过分别对向外相互作用和喷射、向内相互作用和后掠的概率密度函数进行对称分布，抑制了轴向和径向速度波动相关的雷诺剪应力。离壁面稍远的区域的表观粘度与SIS的表观粘度基本一致，且在靠近壁面处存在表观粘度较小的区域。利用表观粘度梯度解释了雷诺切应力被抑制的原因。在采用弯曲的实验中发现，在强减阻的情况下，由弯曲引起的扰动不容易消失，并存在高速区和低速区，直到它们产生强剪切。我们还发现，在弯曲的外部几乎没有扰动。少

项目成果

Influence on Cureved Part with Small Curvature by Surfactant Solution

表面活性剂溶液对小曲率弯曲件的影响

• 发表时间: 2008
• 作者: Hiromasa;Yamane
• 通讯作者: Yamane

二重円筒間流れを利用した界面活性剤水溶液の可視化実験

双筒间流动的表面活性剂水溶液可视化实验

• 发表时间: 2008
• 作者: Hiromasa;Yamane;山根 寛大;田中 裕樹
• 通讯作者: 田中 裕樹

Reynolds Shear Stress of Surfactant Solution in a Circular Pipe

圆管中表面活性剂溶液的雷诺剪切应力

• 发表时间: 2006
• 作者: Iwamoto;Yukiharu
• 通讯作者: Yukiharu

抵抗低減界面活性剤水溶液の曲率の強い90°ベンド内流れに及ぼす影響

减阻表面活性剂水溶液对大曲率90°弯道流动的影响

• 发表时间: 2008
• 作者: 檜原秀樹;他2名;山根 寛大
• 通讯作者: 山根 寛大

曲がり円管内を流れる界面活性剤水溶液の流動特性

表面活性剂水溶液在弯曲圆管内流动的流动特性

• 发表时间: 2007
• 作者: Iwamoto;Yukiharu;山根 寛大
• 通讯作者: 山根 寛大