Abstract
The paper presents the results of an experimental study of the Couette-Taylor flow fluctuations in a ring channel with oppositely rotating multicylinder rotors. Experiments were carried out using water-glycerine solutions as a working fluid. The rotation resistance moment and its pulsations were investigated, using the system for measuring the torque resistance of rotation of rotors, made in the form of a digital dynamometer based on a tension sensor. The investigations made it possible to establish that the classic dependence of the appearance of Taylor vortices is observed in the slit flow of a multicylinder system rotating oppositely. It was shown that in the range of Reynolds numbers Re = (100 – 500), pulsations of dissipative processes with variable frequency and amplitude up to 10% of the mean value of rotation resistance are observed.
Highlights
At present a great practical interest are investigations related to the state of the flow in the slit space, when the coaxial cylinders rotate towards each other with given angular velocities
The optical method used by the authors made it possible to describe the behavior of pulsating structural formations that arise in the annular ring in a wide range of Reynolds number changes
The obtained experimental data make it possible to estimate the efficiency of heat generation due to dissipative processes in the liquid flow in a multi-gap space and to determine the algorithm for calculating the structure, working fluid and operating modes of the heat generator
Summary
At present a great practical interest are investigations related to the state of the flow in the slit space, when the coaxial cylinders rotate towards each other with given angular velocities. The developed experimental setup, the apparatus and the measurement technique made it possible to perform studies of the dependence of the rotation resistance torque on the rotational speed and viscosity of the working fluid.
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