Luchinkin N.A.1, Razuvanov N.G.1, Polyanskaya O.N.1, Sokolov M.A.2, Shenyagin E.M.2
1 National Research University “Moscow Power Engineering Institute” Moscow, Russia
2 Joint Institute for High Temperatures RAS, Moscow, Russia
The results of studies of hydrodynamics and heat transfer in the case of an upward flow of liquid metal in a vertical heated pipe without a magnetic field, as well as in the presence of a transverse magnetic field, are presented. The work was performed on a mercury MHD facility of the Joint Institute for High Temperatures of the Russian Academy of Science. The studies were carried out with uniform and non-uniform heating in the pipe section. With the use of microthermocouple probes, the profiles of the average velocity and temperature, the distribution of local heat transfer coefficients, and pulsation characteristics of temperature both in the cross section and along the length of the pipe were obtained. In the absence of magnetic field, a decrease in the heat transfer coefficients (Nusselt numbers) was found in comparison with purely turbulent values, which qualitatively agrees with the general laws of heat transfer during mixed convection for nonmetallic liquids. Electric currents generated in a transverse magnetic field change the hydrodynamics of the flow, suppressing turbulence and reducing heat transfer down to laminar values. At the same time, interesting effects associated with the influence of electromagnetic forces and thermogravitational convection on the hydrodynamics of the averaged flow and pulsation characteristics of heat transfer have been found in certain regimes in a transverse magnetic field.
1. Dragunov Yu.G., Lemekhov V.V., Moiseev A.V., Smirnov V.S. Reaktor na bystrykh neytronakh so svintsovym teplonositelem (BREST) [Fast neutron reactor with lead coolant (BREST)]. Problemy
mashinostroeniya i avtomatizatsii – Problems of mechanical engineering and automation, 2015, no. 3, pp. 97–103.
2. ITER Organization. Annual Report 2013. Available at: http://www.iter.org/doc/www/content/com/Lists/list_items/Attachments/553/2013_iter_annual_report.pdf (accessed 03.08.2023).
3. Velikhov E.P., Kovalchuk M.V., Azizov E.A. et al. Hybrid fusion reactor for production of nuclear fuel with minimum radioactive contamination of the fuel cycle. Phys. Atom. Nuclei, 2015, vol. 78,
pp. 1134–1137. DOI: https://doi.org/10.1134/S1063778815100142.
4. Genin L.G., Listratov Ya.I., Sviridov V.G., Zhilin V.G., Ivochkin Yu.P., Razuvanov N.G. Experimental studies of hydrodynamics and heat transfer of liquid metals in magnetic fields. Problems of Atomic Science and Technology. Series: Thermonuclear Fusion, 2003, iss. 4, pp. 35–44.
5. Sviridov V.G., Razuvanov N.G., Ivochkin Yu.P., Listratov Ya.I., Sviridov E.V., Genin L.G., Zhilin V.G., Belyaev I.A. Liquid Metal Heat Transfer Investigations Applied to Tokamak Reactor. Proc. of the International Heat Transfer Conference IHTC14. Washington, DC, USA, August 8–13, 2010, pp. 1–8.
6. Zikanov Oleg, Belyaev Ivan, Listratov Yaroslav, Frick Peter, Razuvanov Nikita, Sviridov Valentin. Mixed Convection in Pipe and Duct Flows With Strong Magnetic Fields.Applied Mechanics Reviews, 2021, vol. 73, 010801, pp. 1–34.
7. Genin L.G., Sviridov V.G. Gidrodinamika i teploobmen MGD-techeniy v kanalakh [Hydrodynamics and heat transfer of MHD flows in channels]. Moscow, MEI Publ., 2001. 199 p.
8. Genin L.G., Kovalev S.I., Sviridov V.G. Teplootdacha zhidkogo metalla v trube v usloviyakh vliya-niya termogravitatsionnoy konvektsii i prodol'nogo magnitnogo polya [Heat transfer of liquid metal in a pipe under the influence of thermogravitational convection and longitudinal magnetic field]. Magnitnaya gidrodinamika – Magnetic hydrodynamics, 1987, no. 4, p. 18.
9. Kirillov I.R., Pertsev D.A. Investigation of alternative configurations of the LLCB TBM to increase neutronic and thermo-hydraulics performances. Fusion Engineering and Design, 2010, vol. 85, iss. 7–9, pp. 1054–1058.
10. Petukhov B.S., Polyakov A.F. Teploobmen pri smeshannoy turbulentnoy konvektsii [Heat transfer in mixed turbulent convection]. Moscow, Nauka Publ., 1986. 191 p.
11. Buhr H.O., Horsten E.A., Carr A.D. The distortion of turbulent velocity and temperature profiles on heating, for mercury in a vertical pipe. ASME J. Heat Transfer, 1974, vol. 96, pp. 152–158.
12. Luchinkin N.A., Razuvanov N.G., Belyaev I.A., Sviridov V.G. Heat Transfer in Liquid Metal at an Upward Flow in a Pipe in Transverse Magnetic Field. High Temperature, 2020, vol. 58(3), pp. 400–409.
13. Luchinkin N.A., Razuvanov N.G., Sardov P.A., Polyanskaya O.N. Investigating heat transfer in an upward flow of liquid metal in the mercury facility with a loop of natural circulation. IOP: Journal of Physics: Conf. Series, 2021, vol. 2057 (1), p. 012018.
14. Belyaev I.A., Biryukov D.A., Pyatnitskaya N.Y., Razuvanov N.G., Sviridov E.V., Sviridov V.G. A Technique for Scanning Probe Measurement of Temperature Fields in a Liquid Flow. Thermal Engineering, 2019, vol. 66(6), pp. 377–387.
15. Sviridov V.G., Razuvanov N.G., Shestakov A.A. Teploobmen pri techenii zhidkogo metalla v ver-tikal'noy trube v poperechnom magnitnom pole [Heat transfer during the flow of liquid metal in a vertical pipe in a transverse magnetic field]. Vestnik MEI – MPEI Bulletin, 2011, no. 5, pp. 32–40.
16. Poddubnyi I.I., Razuvanov N.G. Investigation of hydrodynamics and heat transfer at liquid metal downflow in a rectangular duct in a coplanar magnetic field. Therm. Eng., 2016, vol. 63, pp. 89–97. DOI: https://doi.org/10.1134/S0040601516020063.
