Hydrodynamic structure of viscous flows in rotating convergent-divergent channels

The use of heat exchangers in the industry is quite large, it makes up a large share of all heat consumption in Russia, and therefore it is important to have equipment that meets modern requirements. In this regard, there are issues of improving and modernizing obsolete and developing new equipment. The authors proposed a heat exchanger based on effective thermal elements, the working surface of which is made by tightly winding wire having a cross-section in the form of an ovoid on a circular cylinder. In the places where the coils of wire adjoin each other, they are rigidly coupled by means of microplasma or laser welding, which eliminates the phenomenon of work hardening taking place in knurled pipes. To justify the effectiveness of the proposed apparatus, a computer model of the heat transfer process was applied and a physical experiment of the installation was carried out, showing the adequacy of the computer model. Numerical results of heat and hydrodynamic characteristics showed the consistency of the application of the proposed heat exchange equipment, based on spring-twisted elements, in industry, in the field of housing and communal services, as well as in related industries. Research in this direction contributes to the creation of small-sized heat-exchange equipment of large unit capacity.

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Heat exchangers with spring-twisted heat-exchange elements made of wire with sections of various geometries

Gorskaya

Zolotonosov

Martynov

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Solution of conjugate problem in a conical coil heat exchanger

Krutova

Zolotonosov

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Today, coil heat exchangers are widely used in various industries. A large number of works have been published devoted to the study of the characteristics of helical coil heat exchangers. According to the authors, conical coil heat exchangers have higher efficiency compared to helical ones. The article investigates the influence of the geometric parameters of conical coil heat exchangers on their effectiveness. The object of study is a conical coil heat exchanger with different tube diameters of the inner coil (di = 13, 15, 17 mm) and various number of turns (N = 6, 10, 14). Modeling was carried out in the Ansys Fluent software package. For each combination of the parameters, data were obtained on the temperature and velocity of the coolant at the outlet. It was found that a change in the number of turns by a factor of 2.3 leads to an increase in the temperature of the heated fluid by an average of 9.7 ° C. The effect of changing the diameter of the inner coil is non-linear.

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Numerical Simulation of Turbulent Flow in a Rotating Rectangular 90° Bend Channel

Golubkov,

Garbaruk

2023

High Temp

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Hydrodynamic structure of viscous flows in rotating convergent-divergent channels

Cited by 3 publications

References 3 publications

Heat exchangers with spring-twisted heat-exchange elements made of wire with sections of various geometries

Heat exchangers with spring-twisted heat-exchange elements made of wire with sections of various geometries

Solution of conjugate problem in a conical coil heat exchanger

Numerical Simulation of Turbulent Flow in a Rotating Rectangular 90° Bend Channel

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