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Your search keyword '"Ivochkin, Yu. P."' showing total 42 results
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42 results on '"Ivochkin, Yu. P."'

40. METHODS OF GENERATION OF EXTERNAL MAGNETIC FIELDS FOR CONTROL OF ELECTROSLAG WELDING PROCESS.

Author

PROTOKOVILOV, I. V., POROKHONKO, V. B., NAZARCHUK, A. T., IVOCHKIN, Yu. P., and VINOGRADOV, D. A.

Subjects
MAGNETIC fields, ELECTROSLAG welding, ELECTROMAGNETIC forces, ELECTROMAGNETIC induction, HYDRODYNAMICS
Abstract

Efficiency of application of electromagnetic actions for control of joint formation during electroslag welding is determined in many respects by application of external magnetic fields to welding zone and structural peculiarities of corresponding devices. The aim of present work lied in analysis of methods for generation of external magnetic fields during electroslag welding of butt joints and evaluation of their effect on weld pool melt. The main methods of generation of longitudinal and transverse magnetic fields in a welding gap are considered, and principal schemes of corresponding electromagnetic devices are given. It is shown that direction and intensity of electromagnetic force effecting the weld pool melt is determined first of all by spatial orientation of the external magnetic field in relation to object being welded, value of field magnetic induction and its frequency characteristics. Rationality of application of that or another scheme of application of magnetic field in the gap depends on welded joint parameters, and it should be considered separately for each individual case. Appropriateness of application of magnetic fields providing constant (cyclic) rearrangement of hydrodynamic structure of flows in the weld pool or creating melt vibration was indicated. In this case, usage of pulsed magnetic fields generated by discharges of capacitor batteries to electromagnet coil is perspective. Relevance of development of new schemes and devices for generation of magnetic fields and their power sources is shown. [ABSTRACT FROM AUTHOR]

Published
2013

41. Experimental Investigation of Heat Transfer in Liquid Metal Flow in a Horizontal Tube in Longitudinal and Transverse Magnetic Fields under the Conditions of Nonuniform Heating around the Perimeter.

Author

Genin, L. G., Sviridov, V. G., Ivanova, O. N., Zhilin, V. G., Ivochkin, Yu. P., and Razuvanov, N. G.

Subjects
LIQUID metals, HEAT transfer, TOKAMAKS, FUSION reactors, NUCLEAR reactors, HEATING, MAGNETIC fields
Abstract

Experimental investigation of liquid metal heat transfer in a horizontal heated tube in longitudinal and transverse magnetic fields (MF) was carried out. The experiment was approximated to conditions of heat exchanging channels of the TOKAMAK thermonuclear reactor. Heating was uniform along the length and, in the general case, non-uniform around the perimeter of the tube cross section. Temperature fields and velocity profiles, distributions of local and average heat-transfer coefficients, and statistic characteristics of turbulent fluctuations of temperature were measured. An appreciable effect of thermal gravity convection (TGC) on temperature fields and heat transfer in a horizontal tube was observed. Results of the effect of longitudinal and transverse magnetic fields differ greatly. [ABSTRACT FROM AUTHOR]

Published
2004
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