- Engineering and Applications
- Magnetism Study
Brief Research History:
1975 - 1978: Theoretical study of heat transfer processes
in composite bodies with non - ideal thermal contact. The
following investigations were done: steady-state heat
conduction problems in multilayer slab, coaxial hollow
finite cylinders, spherical regions under the conditions
of non - ideal thermal contact and variable boundary
conditions; unsteady - state heat transfer in rotation
shells with non - ideal thermal contact; conjugated heat
conduction problem for thin - wall bodies in case of
variable non - ideal contact; stationary temperature
field in a heat exchanger with a discrete system of heat
contacts.
1978 - present time: Significant attention has been given
to study of the problems that are appeared at the applied
superconductivity. The theory of thermal stability of
composite superconductors and the theory of magnetic
instabilities in superconductors were done. The main mine results are:
- the theory of thermal stabilization of superconductor
has been developed; in framework of this theory the
significant role of the superconductor temperature in the
development of superconducting instability has been
shown;
- the obtained analysis allows to determine the upper
limit of the values of critical thermal energies,
transport current, magnetic field during flux jump,
current charging or magnetic field variation;
- numerical solution of differential equations in partial
derivatives in the composite regions of complex geometry
with variable boundary - contact conditions. These
investigations were based on my numerical programs of
calculations of the processes that take place in
superconducting wires or winding.
There are the following modes:
- one or two dimensional non - stationary calculations of
the heat flow in superconducting current - carrying
elements with fixed current distribution;
- one dimensional heat propagation in superconducting
cables (without corresponding electrodynamics);
- solution a common proceeding of the thermal and
electromagnetic processes in superconductors;
- analytic and numerical analysis of stationary and non -
stationary temperature fields in elements of
superconducting magnets;
- analysis of current leads.The main part of these
programs were executed in Fortran for IBM PC computer
type.
Publications:
Author or co - author more of 100 publications, including
papers in leading international journals.
Publications List of some papers.International Journals:
1.Keilin V.E., Romanovsky V.R. The dimensionless analysis
of the stability of composite superconductors with
respect to thermal disturbances. Cryogenics, 1982, Vol.22,
No.6, pp.313-317.
2.Romanovskii V.R. Regularity of thermal stability
conditions of composite superconductors postulated by the
theory of minimum propagating zone. J. Phys. D: Appl.
Phys, 1985, Vol.18, No.1, pp.121-127.
3.Romanovskii V.R. Influence of volume fraction of
superconductor on the stability of superconducting
composites with respect to thermal disturbances of finite
extent. Cryogenics, 1985, Vol.25, No.6, pp.327-333.
4.Keilin V.E., Lyikov V.V., Romanovskii V.R. et al.
Development of superconducting solenoids from
multifilamentary niobium - tin wires without stabilizing
matrix and analysis of their thermal stability.
Cryogenics, 1985, Vol.25, No.8, pp.462-465.
5.Romanovskii V.R. On mathematical modeling of transition
processes
of the composite superconductors into the normal state.
IEEE Trans.
on MAG., 1987, Vol.23, No.2, pp.1569-1571.
6.Romanovskii V.R. Stability of superconducting
composites under
thermal disturbances with change in the external magnetic
field and
the critical temperature of the superconductor.
Cryogenics, 1988, Vol.28,
No.11, pp.756-761.
7. Romanovskii V.R. Stability of current - carrying
elements of
superconducting magnets to thermal disturbances. Advances
in
Cryogenic Engineering, 1990, Vol.35, pp.693-699.
8. Romanovskii V.R. Theoretical study of quench in
superconducting
magnetic systems. Advances in Cryogenic Engineering, 1990,
Vol.35,pp.709-717.
9. Keilin V.E., Romanovskii V.R. Limiting currents in
superconducting
composites. IEEE Trans. on Mag., 1992, Vol.12, No.1, pp.771
-774.
10. Romanovskii V.R. The two - dimensional generalized
analysis of
thermal stability of composite superconductors.
Cryogenics, 1992, Vol.32,
No.10, pp.431-434.
11. Keilin V.E., Romanovskii V.R. On the theoretical
study of the
superconducting wire curren - carrying capacity.
Cryogenics, 1992, Vol.32,
No.10, pp.577-580.
12. Keilin V.E., Romanovskii V.R. Superconducting state
stability
in current charging into composites. Cryogenics, 1993,
Vol.33, No.10,
pp.986-994.13. Romanovskii V.R., Gavrilin A.V. Current
carrying capacity
reduction in smoothness of voltage - current
characteristics of strands.
Cryogenics, 1997, v.37, n.8, pp.417-420.
14. Romanovskii V.R. Ramp rate limitation in AC multi-strand
superconducting
cables due to statistical scattering in inductive
coupling between strands.
Cryogenics, 1998, Vol.38, No.9, pp.903-909.
15. Romanovskii V.R. Non-isothermal adiabatic critical
state stability of a
hard superconductor. Physica C, 1998, Vol.310, pp.392-399.
16. Pradhan S., Romanovskii V.R. Thermal stability of
superconducting
multifilamentary wire with multiply connected stabilizing
regions.
Cryogenics, 1999, Vol.39, No.4, pp.339-350.
17. Romanovskii V.R. Peculiarities of transport current
penetration in
a composite superconductor during flux creep. Cryogenics,
2002, Vol.42,
No.1, pp.29-37.
18. Romanovskii V.R. Joule heat release in a
superconducting composite
under a transport current charge. Superconductor: Science
and Technology,
2002, Vol.15, No.6, pp.881-887.
19. Romanovskii V.R. Current degradation of multi-strand
superconducting
cable caused by non-ideal inductive coupling between its
components.
IEEE Transactions on Appl. Superconductivity, 2002, Vol.12,
No.1,pp.1578-581.
20. Dudarev A.V., ten Kate H.H.J., Boxman E.W., Keilin V.E.,
Romanovskii V.R.
et al. 20.5 kA current leads for ATLAS Barrel toroid
superconducting
magnets. IEEE Transactions on Appl. Superconductivity,
2002, Vol.12, No.1,
pp.1289-1292.21. Romanovskii V.R. Macroscopic flux-creep
magnetization of
superconductors
in applied magnetic field and local change peculiarities
of their differential
resistivity. Physica C, 2003, Vol.384, No.4, pp.458-468.
Participation in International Conference
1. Romanovskii V.R. On mathematical modeling of
transition
processes of the composite superconductors into the
normal state.
Applied Superconductivity Conference, September 28 -
October 3, 1986
Baltimore, USA (Abstract LC-22, p.31).
2. Romanovskii V.R. The simple theoretical model for
quench
calculation of a superconducting magnet system. Applied
Superconductivity
Conference, August 21-25, 1988 San Francisco, California,
USA,
(Abstract LC-8, p.23).
3. Romanovskii V.R. Stability of current - carrying
elements
of superconducting magnets to thermal disturbances. CEC/ICMC
Conference,
July 24 -28, 1989 Los Angeles, California, USA,(Abstract
BD-08, p.25).
4. Romanovskii V.R. Theoretical study of quench in
superconducting
magnetic systems. CEC/ICMC Conference, July 24 -28, 1989
Los Angeles,
California, USA, (Abstract BD-09, p.25).
5. Romanovskii V.R. Stability of composite
superconductors
under heat pulse. KRYOGENICA, 9th Czechoslovak conference
with international
participation, April 19 - 21, 1988, Usti N.L.,
Czechoslovakia,
(Abstract BP15, p.103).
6. Romanovskii V.R. The theoretical model for quench
calculation.
1-st International conference about technique of low
temperatures,
May 15 -18, 1990, Kosice, Czechoslovakia, (Abstract p.131).
7. Romanovskii V.R. Thermal stability of superconducting
wire in two dimensional case. The 2-d International
conference Cryogenics'92,
May 12 -15, 1992, Brno, Czechoslovakia.
8. Keilin V.E., Romanovskii V.R. Superconducting state
stability at current charging. The 2-d International
conference Cryogenics'92,
May 12 -15, 1992, Brno, Czechoslovakia.
9. Romanovskii V.R. The two - dimensional generalized
analysis of thermal stability of composite
superconductors. 14th International
Cryogenic Engineering Conference and International
Cryogenic Materials
Conference, June 8-12, 1992, Kiev, Ukraine, (Abstract EC-AP20,
p.59).
10. Keilin V.E., Romanovskii V.R. On the theoretical
study of the superconducting wire current - carrying
capacity, 14th
International Cryogenic Engineering Conference and
International Cryogenic
Materials Conference, June 8 - 12, 1992, Kiev, Ukraine,(Abstract
EC-EP14, p.92).
11. Romanovskii V.R. Non-isothermal adiabatic critical
state stability of
a hard superconductor. The 4-th International conference
Cryogenics'96,
1996, Praha, Czech Republic, (Abstract BP56, p.101).
12. Makarov A.M., Romanovskii V.R. The thermal
mechanismof normal zone
acceleration in a composite superconductor. The 4-th
International conference
Cryogenics'96, 1996, Praha, Czech Republic, (Abstract BP57,
p.102).
13. Romanovskii V.R., Gavrilin A.V. Current carrying
capacity reduction in
superconducting multi-strand cable with different
smoothness of
voltage-current characteristics of strands. 16th
International Cryogenic
Engineering Conference and International Cryogenic
Materials Conference,
May 20 - 24, 1996, Kitakyushu, Japan, (Abstract PS2-e2-15,
p.50).
14. Romanovskii V.R. Ramp rate limitation in multi-strand
superconducting
cable caused by various inductive coupling between its
components.
16th International Cryogenic Engineering Conference and
International
Cryogenic Materials Conference, May 20 - 24, 1996,
Kitakyushu, Japan,
(Abstract PS2-e2-16, p.50).
15. Romanovskii V.R. Non-isothermal adiabatic critical
state stability of
a hard superconductor. International Cryogenic Materials
Conference,
Topical Conference on AC Loss and Stability of
Low&High-Tc superconductors,
May 10 - 13, 1998, Enschede, The Netherlands, (Abstract
PC7, p.61).
16. Romanovskii V.R. Joule heating temperature dependence
in a composite
superconductor with changing current. 16th International
Conference on
Magnet Technology, Sept. 26 - October 2 1999, Florida,
USA, (Abstract p.84).
17. Romanovskii V.R. Critical state ramp rate limitation
of a hard
superconductor. 16th International Conference on Magnet
Technology,
Sept. 26 - October 2 1999, Florida, USA, (Abstract p.85).
18. Romanovskii V.R. Current degradation of multi-strand
superconducting
cable caused by non-ideal inductive coupling between its
components.
17th International Conference on Magnet Technology, Sept.
24 - 28 2001,
Geneva, (Abstract THPO1E4-16, p.158).
19. Dudarev A.V., ten Kate H.H.J., Boxman E.W., Keilin V.E.,
Romanovskii V.R.
et al , 20.5 kA current leads for ATLAS Barrel toroid
superconducting
magnets. 17th International Conference on Magnet
Technology,
Sept. 24 - 28 2001, Geneva, (Abstract THPO1E4-16, p.158).
20. Romanovskii V.R. Influence of varying transport
current on Joule
heating temperature dependence in a composite
superconductor.
19th International Cryogenic Engineering Conference, July
22 - 26 2002,
Grenoble, France, (Abstract WedPmPO1-27, p.98).
21. Romanovskii V.R. Quasi-critical regime of flux-creep
state in
superconductors. 19th International Cryogenic Engineering
Conference,
July 22 - 26 2002, Grenoble, France, (Abstract WedPmPO1-28,
p.99).
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