Development of a Couette-Taylor flow device with active minimization of secondary circulation.
Development of a Couette-Taylor flow device with active minimization of secondary circulation.
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开发具有主动最小化二次循环的 Couette-Taylor 流量装置。
DOI：
10.1063/1.3077942
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
M. Burin
中科院分区：
文献类型：
--
作者：
E. Schartman;H. Ji;M. Burin
一种新的Taylor-Couette实验被开发出来用于研究流体动力学和磁流体动力学不稳定性的旋转剪切流，这些不稳定性被认为是驱动天体物理吸积盘角动量输运的原因。高速、同心、旋转的气缸产生的气流高度是径向间隙宽度的两倍。通过将垂直边界分割成一对嵌套的差分旋转环，可以控制和最小化Ekman泵送。端环和气缸由四个独立驱动的旋转部件组成，为开发流动剖面提供了灵活性。实验的工作流体是水、水-甘油混合物或液态镓合金。设备的机械复杂性和镓合金高速运行产生的大动压力提出了独特的挑战。讨论了实验的力学实现和激光多普勒测速在水中得到的一些有代表性的结果。
A novel Taylor-Couette experiment has been developed to produce rotating shear flows for the study of hydrodynamic and magnetohydrodynamic instabilities which are believed to drive angular momentum transport in astrophysical accretion disks. High speed, concentric, corotating cylinders generate the flow where the height of the cylinders is twice the radial gap width. Ekman pumping is controlled and minimized by splitting the vertical boundaries into pairs of nested, differentially rotating rings. The end rings and cylinders comprise four independently driven rotating components which provide flexibility in developing flow profiles. The working fluids of the experiment are water, a water-glycerol mix, or a liquid gallium alloy. The mechanical complexity of the apparatus and large dynamic pressures generated by high speed operation with the gallium alloy presented unique challenges. The mechanical implementation of the experiment and some representative results obtained with laser Doppler velocimetry in water are discussed.