van Gils Dennis P M, Bruggert Gert-Wim, Lathrop Daniel P, Sun Chao, Lohse Detlef
Department of Applied Physics, University of Twente, Enschede, The Netherlands.
Rev Sci Instrum. 2011 Feb;82(2):025105. doi: 10.1063/1.3548924.
A new turbulent Taylor-Couette system consisting of two independently rotating cylinders has been constructed. The gap between the cylinders has a height of 0.927 m, an inner radius of 0.200 m, and a variable outer radius (from 0.279 to 0.220 m). The maximum angular rotation rates of the inner and outer cylinder are 20 and 10 Hz, respectively, resulting in Reynolds numbers up to 3.4 × 10(6) with water as working fluid. With this Taylor-Couette system, the parameter space (Re(i), Re(o), η) extends to (2.0 × 10(6), ±1.4 × 10(6), 0.716-0.909). The system is equipped with bubble injectors, temperature control, skin-friction drag sensors, and several local sensors for studying turbulent single-phase and two-phase flows. Inner cylinder load cells detect skin-friction drag via torque measurements. The clear acrylic outer cylinder allows the dynamics of the liquid flow and the dispersed phase (bubbles, particles, fibers, etc.) inside the gap to be investigated with specialized local sensors and nonintrusive optical imaging techniques. The system allows study of both Taylor-Couette flow in a high-Reynolds-number regime, and the mechanisms behind skin-friction drag alterations due to bubble injection, polymer injection, and surface hydrophobicity and roughness.
一个由两个独立旋转圆柱组成的新型湍流泰勒-库埃特系统已经构建完成。两圆柱之间的间隙高度为0.927米，内半径为0.200米，外半径可变（从0.279米到0.220米）。内圆柱和外圆柱的最大角旋转速率分别为20赫兹和10赫兹，以水作为工作流体时，雷诺数可达3.4×10⁶ 。利用这个泰勒-库埃特系统，参数空间（Re(i)、Re(o)、η）扩展到（2.0×10⁶、±1.4×10⁶、0.716 - 0.909）。该系统配备了气泡注入器、温度控制装置、表面摩擦阻力传感器以及几个用于研究湍流单相和两相流的局部传感器。内圆柱测力计通过扭矩测量来检测表面摩擦阻力。透明的丙烯酸外圆柱使得可以利用专门的局部传感器和非侵入式光学成像技术来研究间隙内液体流和分散相（气泡、颗粒、纤维等）的动力学。该系统既可以研究高雷诺数 regime 下的泰勒-库埃特流，也可以研究由于气泡注入、聚合物注入以及表面疏水性和粗糙度导致的表面摩擦阻力变化背后的机制。 （注：这里“regime”直译为“ regime”，在流体力学等领域可能有特定专业含义，需结合上下文准确理解，暂保留英文未翻译）
