Experimental investigation of subsonic combustion driven MHD generator performance

McClaine, Andrew W.; Swallom, D.W.; Kessler, R.

doi:10.2514/6.1984-157

Cited by 2 publications

(2 citation statements)

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“…These results are similar to the nieasurements reported by McClaine et al (1985). In their experiments, performed in the larger Avco Mk V l channel, the conditions included a magnetic induction of 4 T, an interaction length of 2.5 m, and peak velocities of about 1000 m/s.…”

Section: Mean Axial Velocitysupporting

confidence: 87%

“…Demetriades et al (1983) conjectured that evident arc damage to the centre of the anode wall in the downstream half of the channel used in the High Performance Demonstration Experiment a t the Arnold Engineering Development Center (Starr et al 1982) was a manifestation of the magnetoaerothermal instability mentioned above. McClaine, Swallom & Kessler (1985) reported axial velocity profiles measured using a traversing stagnation pressure probe mounted in the diffuser of the Avco Mk VI generator. The profile measured between the top and bottom walls was found to be strongly skewed by MHD forces, presumably as a consequence of secondary flow.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of secondary flow in a magnetohydrodynamic channel

Girshick

Kruger

1986

J. Fluid Mech.

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The Hall effect in the magnetohydrodynamic (MHD) channel flow of a plasma leads to the presence of transverse Lorentz forces. The non-uniform distribution of these body forces may cause secondary flows to develop; these can exert a significant influence on the plasma momentum, thermal and electrical behaviour. The effect is predicted to be large for envisioned large-scale MHD devices. An experimental study of this phenomenon is described. The apparatus consisted of a laboratory-scale MHD channel in which a controlled net axial current was applied. Plasma velocities were measured using laser-Doppler anemometry. The results demonstrate that transverse Lorentz forces can drive intense secondary flows at a value of the magnetic interaction parameter based on the Hall current of approximately one. The peak measured transverse velocities were 15% of the bulk velocity. Qualitatively, the basic character of the large-scale secondary flow structure was in accord with a simple model based on a first-order distribution of the axial current density. Measurements were also made under a variety of conditions of the profiles of mean axial velocity and of the axial and transverse components of turbulence intensity, of electrode surface temperatures and of plasma voltage distributions. These results all support the conclusion that convective transport by MHD secondary flow caused significant asymmetries to develop in the cross-plane distribution of scalar quantities.

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Section: Mean Axial Velocitysupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%