Results 231 to 240 of about 61,345 (281)
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Magnetohydrodynamics in turbulent swirling flow
1998We report an experimental study of the magnetic field fluctuations generated in a turbulent flow of liquid gallium, in the presence of an externally applied field. We consider the case of a weak‘seed’ field \({\vec B_0}\), so that the Lorentz forces do not modify the flow [1].
P. Odier, J.-F. Pinton, S. Fauve
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Journal of Energy, 1977
Tests in a combustion centrifuge demonstrated that the normal progression from laminar flamespeeds of about 0.3 m/s (in hydrocarbon-air mixtures) to turbulent flamespeeds of up to 6.1 m/s can be advanced to a third stage, where flamespeeds in excess of 19 m/s were measured.
George D. Lewis +2 more
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Tests in a combustion centrifuge demonstrated that the normal progression from laminar flamespeeds of about 0.3 m/s (in hydrocarbon-air mixtures) to turbulent flamespeeds of up to 6.1 m/s can be advanced to a third stage, where flamespeeds in excess of 19 m/s were measured.
George D. Lewis +2 more
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On the Stability of Compressible Swirling Flow
Studies in Applied Mathematics, 1973The linear stability to axisymmetric perturbations of compressible non‐dissipative swirling flow is shown to be insured if a suitably defined “Richardson number” depending on the basic velocity, temperature and density fields everywhere exceeds 1/4. This result combines and generalizes in a natural way some known results for incompressible swirling ...
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Hydrotechnical Construction, 1993
1. With an increase of the flow velocity v from 7.58 to 14.67 m/sec and change of k/kcr in the interval of the most erosion-active values from 0.75 to 0.39, Eph increases proportionally to v5, although Ef increases proportionally to v3. This indicates that in the presence of general erosion activity of the cavitation regime of the flow, a small ...
A. V. Efimov, T. Yu. Kuznetsova
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1. With an increase of the flow velocity v from 7.58 to 14.67 m/sec and change of k/kcr in the interval of the most erosion-active values from 0.75 to 0.39, Eph increases proportionally to v5, although Ef increases proportionally to v3. This indicates that in the presence of general erosion activity of the cavitation regime of the flow, a small ...
A. V. Efimov, T. Yu. Kuznetsova
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25th AIAA Aerospace Sciences Meeting, 1987
The physics of the flow interaction between swirl and secondary flow was studied in duct bends relevant to the design of advanced aircraft nozzle systems. Both laminar and turbulent subsonic flows were investigated in generic duct bends for different amounts of swirl.
TOMMY TSAI, RALPH LEVY
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The physics of the flow interaction between swirl and secondary flow was studied in duct bends relevant to the design of advanced aircraft nozzle systems. Both laminar and turbulent subsonic flows were investigated in generic duct bends for different amounts of swirl.
TOMMY TSAI, RALPH LEVY
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Journal of Applied Mechanics, 1954
Abstract The problem of the decay of a rotationally symmetric steady swirl superimposed on Poiseuille flow in a round pipe was investigated theoretically and experimentally. The object was to determine the degree to which the rate of decay of the swirl as predicted by a linearized theory agreed with measured rates of decay at flow ...
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Abstract The problem of the decay of a rotationally symmetric steady swirl superimposed on Poiseuille flow in a round pipe was investigated theoretically and experimentally. The object was to determine the degree to which the rate of decay of the swirl as predicted by a linearized theory agreed with measured rates of decay at flow ...
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Experiments on swirling turbulent flows. Part 1. Similarity in swirling flows
Journal of Fluid Mechanics, 1973The effects of swirl on internal turbulent flows are studied by conducting experiments on turbulent pipe flow with variable initial swirl. This first part of the study is primarily concerned with similarity laws. The mean velocity profiles, both away from and close to the wall, are found to admit similarity representations at sufficiently large ...
K. S. Yajnik, M. V. Subbaiah
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The Stability of Compressible Swirling Flow
International Journal of Nonlinear Sciences and Numerical Simulation, 2000Summary: We investigate analytically the stability of inviscid compressible and variable density swirling flows between two concentric cylinders. Two criteria for necessary and sufficient condition for stability are derived under narrow gap approximation. The criteria are compared with other stability criteria for similar flows. Finally, we investigate
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AIAA Journal, 1969
An approximation that can be used to determine how swirl affects the choking constraint on flow through the throat of a nozzle is obtained. The flow model is consistent with an experimentally observed flow pattern that contains a recirculating internal cell upstream of the throat.
W. S. LEWELLEN +2 more
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An approximation that can be used to determine how swirl affects the choking constraint on flow through the throat of a nozzle is obtained. The flow model is consistent with an experimentally observed flow pattern that contains a recirculating internal cell upstream of the throat.
W. S. LEWELLEN +2 more
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AIChE Journal, 1961
AbstractThe presence of vortex motion in a vertical cylinder in which water is passed upward can result in three types of velocity profiles: net upward motion at all points in the tube, an ascending outer annulus and a descending central core, and outer annulus and central core ascending and an intermediate annulus descending.All three types of ...
Alfred H. Nissan, V. P. Bresan
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AbstractThe presence of vortex motion in a vertical cylinder in which water is passed upward can result in three types of velocity profiles: net upward motion at all points in the tube, an ascending outer annulus and a descending central core, and outer annulus and central core ascending and an intermediate annulus descending.All three types of ...
Alfred H. Nissan, V. P. Bresan
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