Results 191 to 200 of about 37,617 (247)
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The Rotated Hot Wire Anemometer
Review of Scientific Instruments, 1971The novel method of measuring turbulence intensities and shear stress by a rotating single hot wire anemometer presented by Fujita and Kovasznay [Rev. Sci. Instrum. 39, 1351 (1968)] was used to make turbulence measurements in the wake of a thin flat plate.
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Vibration of hot-wire anemometer filaments
Journal of Fluid Mechanics, 1971Hot-wire filament vibration generated by fluctuating aerodynamic loads is found to occur in turbulent flow fields. The motion of the filament relative to the stream can cause errors in the indicated velocity fluctuations. Analysis and experiment show that these errors are probably serious only when the velocity fluctuations are confined within a narrow
A. E. Perry, G. L. Morrison
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1964
Abstract : This paper presents the need for an accurate low wind speed measuring system for the White Sands Missile Range Wind Instrument Test Facility. It describes a device that has been installed in the facility and which operates on the principle of periodic eddy shedding on the down-wind side of a cylinder.
null Jr, Roy I. Glass
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Abstract : This paper presents the need for an accurate low wind speed measuring system for the White Sands Missile Range Wind Instrument Test Facility. It describes a device that has been installed in the facility and which operates on the principle of periodic eddy shedding on the down-wind side of a cylinder.
null Jr, Roy I. Glass
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Constant-bandwidth constant-temperature hot-wire anemometer
Review of Scientific Instruments, 2007A constant-temperature anemometer (CTA) enables the measurement of fast-changing velocity fluctuations. In the classical solution of CTA, the transmission band is a function of flow velocity. This is a minor drawback when the mean flow velocity does not significantly change, though it might lead to dynamic errors when flow velocity varies over a ...
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A constant temperature hot-wire anemometer
Journal of Physics E: Scientific Instruments, 1987A constant temperature anemometer is described which is designed to operate hot wires with diameters in the range 0.63-5 mu m. A special feature of the design is the use of separate current sources to supply the different halves of the bridge. This feature eliminates the need for dynamic stability compensation, necessary for commercial constant ...
I S Miller, D A Shah, R A Antonia
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Review of Scientific Instruments, 1968
An analysis is given of the electronic noise and the signal-to-noise ratio for constant-temperature and constant-current hot-wire anemometers. The analysis shows that both anemometers are equivalent in their signal-to-noise ratio if the noise sources are equivalent and the hot-wires are operated at the same conditions.
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An analysis is given of the electronic noise and the signal-to-noise ratio for constant-temperature and constant-current hot-wire anemometers. The analysis shows that both anemometers are equivalent in their signal-to-noise ratio if the noise sources are equivalent and the hot-wires are operated at the same conditions.
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An Optical Fiber Hot-Wire Anemometer
SPIE Proceedings, 1990Gas flow rates can be measured with a hot-wire anemometer which employs a fine wire mounted transversely to the gas flow. The wire is heated by an electrical current and the temperature rise, which depends inversely on the flow rate, is determined by the resistance change of the wire. In the optical fiber anemometer the fine wire is replaced by a short
L. C. Bobb +3 more
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Improved calibration of hot-wire anemometers
Journal of Physics E: Scientific Instruments, 1983A new method of treating the data obtained for static calibration of hot wires has been developed. The method employs a Taylor series expansion of the nonlinear hot-wire equation about initial estimates of the required calibration constants. An iterative procedure using the Newton-Raphson technique then yields the new calibration constants.
M K Swaminathan +3 more
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A Hot Wire Anemometer for Cryogenic Hydrodynamic Experiments
Applied Scientific Research, 1992Abstract A hot wire anemometer using superconducting thin films has been developed for measurements in a gaseous 4 He turbulent round jet around 4 K. Localized velocity fluctuations, down to a few microns, and high frequency events, up to 1 MHz can be detected giving access to the study of turbulent subsonic flow with Reynolds numbers ranging up to ...
Bernard Castaing +3 more
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Hot-wire anemometer paper tape reader
Papers presented at the December 13-15, 1960, eastern joint IRE-AIEE-ACM computer conference on - IRE-AIEE-ACM '60 (Eastern), 1960The Hot-Wire Anemometer Paper Tape Reader was conceived as a relatively simple apparatus to serve as a high reliability device such as required in peripheral computation equipment. The hot-wire anemometer principle has been employed extensively in the past for the study of transient air flow phenomena in compressors and turbines.
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