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[en] A numerical investigation shows the possibility of an electrothermal interelectrode breakdown of the wall of an MHD-channel. Two-dimensional calculations were done for conditions close to those in large-scale MHD channels: Reynolds number ≅5x106, magnetic field 2.5 and 5 T, and average electron current density 0-5 A/cm2. Examination of the charge at the anode wall, which consists of ceramic electrodes and insulators, shows that the most probable breakdown from an induced electric field occurs in the insulating gap from a continuous upward propagation of an overheated region of the insulator through the flow. Integral electrical characteristics of the discharge are presented for two values of the magnetic field and various electrical loads on the part of the wall under investigation, and the two-dimensional distributions of the potential, current, and temperature are displayed
Journal
[en] On the basis of numerical simulation dynamics of a nonuniform conducting gas flow in MHD-generator channel is studied. A mechanism of plasmoids dynamic interaction with flowing around low-conducting gas, plasmoid shape variation tendency, evolution of the flow gas-dynamic structure are studied
Journal
Izvestiya Akademii Nauk SSSR, Mekhanika Zhidkosti i Gaza; ISSN 0568-5281; 
; CODEN IMZGA; (no.5); p. 135-145
; CODEN IMZGA; (no.5); p. 135-145
[en] Various aspects of the external magnetic field impact on the turbulent flowing liquid are considered. The electrical values distribution by small magnetic fields is found. It is shown that the turbulent motion in case of very large magnetic fields acquires two-dimensional structure
Journal
Zhurnal Ehksperimental'noj i Teoreticheskoj Fiziki; ISSN 0044-4510; ; CODEN ZETFA7; v. 111(2); p. 528-535
; CODEN ZETFA7; v. 111(2); p. 528-535
[en] A three-dimensional problem on flow of heat- and electricity conducting viscous gas in the channels of large-scale MHD-generators is considered. A system of equations including Navier-Stokes parabolized equations, a system of equations of k-E-turbulence model, two-dimensional equations of electrodynamics in cross section is solved by numerical method. A comparative analysis of integral and local characteristics of MHD-generator frame and diagonal channels under design conditions of flow and electric loading is carried out. Integral characteristics of considered channels practically coinside. Analysis of obtained local characteristics of the channels shows that frame-like channel is more preferable, in particular, relative to local separation of the boundary layers
Journal
No abstract available
Source
Rossijskaya Akademiya Nauk, Moscow (Russian Federation); Nauchnyj Sovet RAN po Fizike Plazmy, Moscow (Russian Federation); Nauchnyj Sovet RAN po Kompleksnoj Probleme Fizika Nizkotemperaturnoj Plazmy, Moscow (Russian Federation); Inst. Obshchej Fiziki im. A.M. Prokhorova RAN, Moscow (Russian Federation); Nauchno-Tekhnologicheskij Tsentr PLASMAIOFAN, Moscow (Russian Federation); Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation); Ob''edinennyj Inst. Vysokikh Temperatur RAN, Moscow (Russian Federation); 416 p; ISBN 978-5-242-01171-6; ; 2011; p. 351; 38. International (Zvenigorod) conference on plasma physics and controlled fusion; XXXVIII Mezhdunarodnaya (Zvenigorodskaya) konferentsiya po fizike plazmy i UTS; Zvenigorod (Russian Federation); 14-18 Feb 2011; 2 refs.
; 2011; p. 351; 38. International (Zvenigorod) conference on plasma physics and controlled fusion; XXXVIII Mezhdunarodnaya (Zvenigorodskaya) konferentsiya po fizike plazmy i UTS; Zvenigorod (Russian Federation); 14-18 Feb 2011; 2 refs.
No abstract available
Source
Rossijskaya Akademiya Nauk, Moscow (Russian Federation); Nauchnyj Sovet RAN po Fizike Plazmy, Moscow (Russian Federation); Nauchnyj Sovet RAN po Kompleksnoj Probleme Fizika Nizkotemperaturnoj Plazmy, Moscow (Russian Federation); Inst. Obshchej Fiziki im. A.M. Prokhorova RAN, Moscow (Russian Federation); Ob''edinennyj Inst. Vysokikh Temperatur RAN, Moscow (Russian Federation); Nauchno-Tekhnologicheskij Tsentr PLASMAIOFAN, Moscow (Russian Federation); Moskovskij Gosudarstvennyj Univ. im. M.V. Lomonosova, Moscow (Russian Federation); Tsentr Lazernoj Tekhnologii i Materialovedeniya, Moscow (Russian Federation); 433 p; ISBN 978-5-9903264-5-3; ; 2015; p. 363; 42. international Zvenigorod conference on plasma physics and controlled fusion; XLII Mezhdunarodnaya Zvenigorodskaya konferentsiya po fizike plazmy i upravlyaemomu termoyadernomu sintezu; Zvenigorod (Russian Federation); 9-13 Feb 2015; 2 refs., 1 fig.
; 2015; p. 363; 42. international Zvenigorod conference on plasma physics and controlled fusion; XLII Mezhdunarodnaya Zvenigorodskaya konferentsiya po fizike plazmy i upravlyaemomu termoyadernomu sintezu; Zvenigorod (Russian Federation); 9-13 Feb 2015; 2 refs., 1 fig.
[en] Statement of an associated problem is formulated and method for its solution is developed for numeric investigation into the heat transfer and electrodynamics near the walls, sorrounded by plasma flow with highly inhomogeneous thermal and electrophysical properties. For near-electrode phenomenon account approximated models providing for a qualitative non-equilibrium ionization deroption in the near-anode area and space charge layer in the near-cathode area are proposed. Using the approach developed two-dimensional effects for a combined wall with periodic structure, operating in the anode regime in the applied electrical field are investigated
Journal
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