Results 271 to 280 of about 85,518 (307)

Dynamic Response of a Rotating Blade with Time-Dependent Rotating Speed

Journal of Sound and Vibration, 1993
Abstract The general vibration of a rotating blade with time-dependent angular speed is investigated in this paper. A simple plate model is used to represent the blade, and its angular speed is characterized as a small periodic perturbation superimposed on a constant speed.
Young, T. H., Liou, G. T.
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High-speed rotation

Physics Today, 1959
Upon this occasion the speaker usually reviews some scientific or technical subject with which he is or has been associated or he discusses current problems involving the role of physics in human affairs. Although the latter subject certainly is most timely and important, I shall address myself to the former. I will attempt to discuss some applications
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High-speed rotating devices

Contemporary Physics, 1972
Abstract High-speed rotation provides many facilities which are unattainable by any other process. Very high linear velocities and also exceptionally high force fields can be obtained in the laboratory. The gyroscope can give a reference platform which is stable even within a violently unstable environment.
Boris V. Barlow, R. S. Read
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A method for indicating speeds of rotation

Journal of Scientific Instruments, 1939
A method of indicating speed of rotation is described in which the frequency of the current generated by the rotation of a small bar of iron or mild steel, attached to the rotor and in the field of an electro-magnet, is measured by a vibration galvanometer adjusted to reasonance with a multiple of the required rate of revolution.
G Morris, R S Silver
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The rotational speed of the upper atmosphere

Space Science Reviews, 1966
This paper describes the method for determining the rotational speed of the Earth's upper atmosphere from the changes in the orbital inclinations of satellites, and briefly reviews the observational results so far obtained at heights above 180 km, both by this method and by measuring the movements of vapour trails.
D.G. King-Hele, R.R. Allan
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A Technique for High Rotational Speeds

Journal of Scientific Instruments, 1948
A description is given of the design and construction of steel rotors that can be spun in vacuum to peripheral speeds exceeding 105 cm./sec. The rotors are tapered rods, several inches long, and are driven by a rotating magnetic field. Orbital motions are prevented by means of a magnetic suspension to which oil-damping is applied.
D G Marshall, P B Moon, J E S Robinson, J T Stringer   +3 more
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The Production of High Rotational Speeds

Review of Scientific Instruments, 1935
Methods of spinning rotors to very high speeds by means of compressed air are discussed. A detailed description is given of the construction of apparatus to spin rotors both in gases at various pressures and in vacuum. Some uses of the apparatus and its operating characteristics are outlined.
J. W. Beams, E. G. Pickels
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Microturbine Rotational Speed Selection

Volume 5A: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, 2013
This paper delves upon the Aero-Thermodynamic performance and Mechanical design aspects of microturbines comprising a single shaft radial compressor driven by a single stage radial inflow turbine with a combustor and recuperator sized to directly drive a permanent magnet type high speed generator with an output power in the 5–10KW bracket and ...
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Rotational Speed

2023
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Rotation Speed Sensing with mmWave Radar

IEEE INFOCOM 2023 - IEEE Conference on Computer Communications, 2023
Rong Ding, Haiming Jin, Dingman Shen
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