Experimental investigation of rotation resistance moment energy spectra in multicylindrical circular Couette system with independently rotating cylinders

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.

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Research on Rotational Resistance Moment of Rotary Energy Recovery Device

E3S Web of Conferences ◽

10.1051/e3sconf/20185302001 ◽

2018 ◽

Vol 53 ◽

pp. 02001

Author(s):

Ang GUO ◽

Zuo-dong HUANG ◽

Zai-ran DING ◽

Yi SHI ◽

Lei JIAO ◽

...

Keyword(s):

Energy Recovery ◽

Rotation Speed ◽

Structural Characteristics ◽

Internal Flow ◽

Operational Conditions ◽

Clearance Flow ◽

Resistance Moment ◽

Changing Trend ◽

Rotational Resistance ◽

Rotation Resistance

The effects of operational conditions on the resistance moment of a rotary energy recovery device have been systematically investigated through the computational fluid dynamics in this paper. Based on the structural characteristics of the rotary energy recovery device, the hydro-static bearing was established on both sides of the rotor. Simulation results indicate that for the rotation resistance moment generated by the rotor internal flow path, the rotation speed is linearly positive with the rotational resistance moment. For the rotation resistance moment generated by the clearance flow, the rotation speed is also positively correlated with the rotational resistance moment. The circular clearance size is negatively correlated with the rotation resistance moment, and the endcover fluid film size is negatively correlated with the rotation resistance moment. The boundary speed between laminar flow and turbulent flow was found by comparing the changing trend of rotational resistance moment. The obtained relation between clearance, the speed of the rotor and resistance moment provides a simple way to predict the resistance moment of the device, which will be beneficial to design the energy-efficient rotary energy recovery device

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Experimental investigation of energy dissipation in the multi-cylinder Couette-Taylor system with independently rotating cylinders

Applied Energy ◽

10.1016/j.apenergy.2019.113362 ◽

2019 ◽

Vol 251 ◽

pp. 113362 ◽

Cited By ~ 1

Author(s):

A.F. Serov ◽

A.D. Nazarov ◽

V.N. Mamonov ◽

V.I. Terekhov

Keyword(s):

Experimental Investigation ◽

Energy Dissipation ◽

Rotating Cylinders

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Moment-rotation behavior of semi-rigid web cleat connections

Challenge Journal of Structural Mechanics ◽

10.20528/cjsmec.2020.03.002 ◽

2020 ◽

Vol 6 (3) ◽

pp. 110

Author(s):

Merve Sağıroğlu ◽

Mahyar Maali ◽

Abdulkadir Cüneyt Aydın ◽

Mahmut Kılıç

Keyword(s):

Experimental Investigation ◽

Static Loading ◽

Bolted Connections ◽

Rotation Capacity ◽

Eurocode 3 ◽

Moment Resisting ◽

Resistance Moment ◽

Rigid Connection ◽

The Moment ◽

Standard Profile

The behavior of beam-column semi-rigid connection plays an important role in the response of a steel moment resisting, stiffness and rotation capacity framed structure, especially under static loading conditions. In this study, the moment-rotation characteristics of semi-rigid bolted connections using web cleat connections with IPE standard profile is discussed, based on the experimental investigation. The study revealed that the moment resistance of beam-column semi-rigid connection is improved by increasing the height of the beam to the height of web cleat joint (H), and the increasing thickness of web and flange in web cleat joints. The aim was to provide necessary data to improve the Eurocode 3 and efficiently use residue IPE standard profiles, rather than send them back to the consumption cycle. While the resistance moment increased with an increase in H from Hmin to Hmax.

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Энергетические распределения вторичных заряженных частиц при распылении газовыми кластерными ионами

Письма в журнал технической физики ◽

10.21883/pjtf.2021.08.50849.18657 ◽

2021 ◽

Vol 47 (8) ◽

pp. 25

Author(s):

А.Е. Иешкин ◽

А.А. Татаринцев ◽

Д.С. Киреев ◽

В.И. Бачурин ◽

А.С. Рудый

Keyword(s):

Experimental Investigation ◽

Energy Transfer ◽

Ion Irradiation ◽

Charged Particles ◽

Energy Spectra ◽

Polycrystalline Copper ◽

Secondary Particles ◽

Cluster Bombardment ◽

Xenon Cluster ◽

Cluster Ion

We present an experimental investigation of the energy spectra of the charged particles emitted from polycrystalline copper under argon and xenon cluster ion irradiation. Positive secondary particles have significantly lower energies than in the case of sputtering with atomic argon. The spectra of the charged particles emitted under xenon cluster bombardment are systematically narrower than the corresponding ones obtained under argon cluster bombardment. The observed regularities can be explained in terms of energy transfer form a cluster to the target.

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Experimental investigation of the origin of residual disturbances in turbulent MHD flows after laminarization

Journal of Fluid Mechanics ◽

10.1017/s0022112079001221 ◽

1979 ◽

Vol 94 (4) ◽

pp. 629-647 ◽

Cited By ~ 12

Author(s):

H. Branover ◽

P. Gershon

Keyword(s):

Magnetic Field ◽

Experimental Investigation ◽

Fluid Flow ◽

Transverse Magnetic ◽

Energy Spectra ◽

Field Region ◽

Physical Explanation ◽

Magnetic Field Region ◽

Hot Film ◽

The Magnetic Field

The problem of the strong velocity disturbances remaining after the laminarization of an electroconductive fluid flow in a transverse magnetic field was investigated experimentally. The turbulence intensities, two-point correlations, and energy spectra of the velocity pulsations were measured using two-electrode probes and hot-film sensors. The two hypotheses with regard to a physical explanation of the persistence of the disturbances were examined, and it was concluded that these disturbances are generated mainly at the entry of the flow into the magnetic-field region. An almost undisturbed laminarized flow was obtained by eliminating the entry effects.

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