Analysis of Arc-Heating Phenomena in a Tube

Skifstad, J. G.; Murthy, S. N. B.

doi:10.1109/tns.1964.4323334

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…A major development with this approach has been the rigorous formulation of the conservation equations in radially integrated form for both the overall aerodynamic system (Cowley 1974a,b) and also for the electrically conducting arc core as a distinct entity (Chan et a2 1976). As a result the theoretical analyses of Skifstad and Murthy (1964), Swanson and Roidt (1970), Topham (1971Topham ( , 1972, Frost and Libermann (1971) and Lowke and Ludwig (1975) are identifiable as special cases of this more general formulation.…”

Section: Theoretical Description Of Arcs In Axialjowmentioning

confidence: 96%

The physics of high-power arcs

Jones

Fang

1980

Rep. Prog. Phys.

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Recent progress in the physics of high-power arcs has been largely due to a blend of detailed experimental and theoretical investigations aimed at explaining the electrical behaviour of the discharge in terms of fundamental physical processes.I n the case of collision-dominated, high-pressure arcs the important role of radiative energy transfer, including strong self-absorption, has been established through the experimental and theoretical study of cylindrically symmetric, uncontaminated arc plasmas. As a result, an insight has been gained into the additional complications produced in naturally occurring high-pressure arcs by electrode vapour contamination and self-magnetically-propelled plasma flows. Application of the boundary layer integral method of aerodynamics in conjunction with extensive property measurements has enabled the higher-power dissipation capabilities of arcs in imposed axial flows to be related to flow acceleration and turbulent exchange processes. Integral methods have also given an insight into arc properties and behaviour in the presence of severe ablation of an arc-confining wall.The application of similarity theory based upon the conservation equations of fluid mechanics has produced good correlation of the properties of arcs in transverse flows and magnetic fields under a number of different operating conditions. Criteria defining stable arc operation have been derived using stability theory whilst axisymmetric instabilities of arcs in accelerating flows have been related to vortex production at the arc boundary.Although much detailed experimental and theoretical studies have also been made of arcs in vacuum, there remains a need for a general theoretical description. I n addition, despite agreement that cathode processes exert a strong influence upon vacuum arc properties, there is uncertainty concerning the proportion and spatial distributions of the various particle species emitted by the cathode. Nonetheless a qualitative appreciation of the processes governing the overall electrical characteristics for different current ranges has been achieved.

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Section: Theoretical Description Of Arcs In Axialjowmentioning

confidence: 96%

The physics of high-power arcs

Jones

Fang

1980

Rep. Prog. Phys.

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“…This procedure can be an aid to physical comprehension if the normalizing quantities are chosen such that the resulting area value of an integral can be related qualitatively to an observable feature of arcs. This is a common procedure in the analysis of aerodynamic boundary layers and was introduced in the arc context by Skifstad and Murthy (1964).…”

Section: Representation By Areasmentioning

confidence: 99%

“…There have been several attempts in recent years (by for example Lebedev et al 1969, Skifstad and Murthy 1964, Swanson and Roidt 1971, Topham 1971, 1972a to predict the behaviour of electric arcs in flow predominantly parallel to their axes by means of approximate integral methods. Such methods have been for a long time a stock technique of aerodynamicists for the analysis of boundary layers (Schlichting 1958) but have not been developed to the same extent in the context of electric arcs.…”

Section: Introductionmentioning

confidence: 99%

Integral methods of analysing electric arcs: I. Formulation

Cowley¹

1974

J. Phys. D: Appl. Phys.

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The equations of continuity, momentum and energy are derived for axisymmetric electric arcs in terms of overall radial integrals. The external flow is assumed to be adiabatic, reversible and one-dimensional, although compressibility and the possibility of time variation are included. The overall integrals define quantities with the dimensions of area when their integrands are normalized. Arc problems can then be solved in principle if relations between the area quantities can be guessed or found empirically, and a formal structure for such empiricism is suggested. It is shown that the enthalpy-flow model of Frost and Liebermann (1971) is equivalent to an integral method at a low level of approximation. The analyses of Topham (1971, 1972a, b) are related to the present general formulation.

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Approximate relation for the heat flow to the walls of a tube arc heater

Suksov

1969

J Appl Mech Tech Phys

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Analysis of Arc-Heating Phenomena in a Tube

Cited by 6 publications

References 6 publications

The physics of high-power arcs

The physics of high-power arcs

Integral methods of analysing electric arcs: I. Formulation

Approximate relation for the heat flow to the walls of a tube arc heater

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