Results 201 to 210 of about 37,617 (247)

A Constant-Temperature Hot-Wire Anemometer

Architectural Science Review, 1979
This article describes a constant-temperature hot-wire anemometer that measures average and turbulent wind velocities. Its main features are good accuracy and ease of calibration and operation.
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A linear, temperature compensated hot-wire anemometer

Journal of Scientific Instruments, 1957
A hot-wire anemometer is described which gives a linear output over the range of wind speed 1 to 16 m/s and is therefore well suited to studies of atmospheric turbulence. It is also provided with temperature compensation so that the effects of air temperature fluctuations (both rapid and slow) are eliminated.
E L Deacon, D R Samuel
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Temperature Compensated Linearizer for Hot-Wire Anemometer

Review of Scientific Instruments, 1969
A description of a ``linearizing circuit'' for low velocity hot-wire anemometry is given and a detailed analysis of the transistors chain used to generate the desired function is presented. The frequency response of the complete circuit proved very satisfactory, but special consideration had to be given to compensation for the temperature sensitivity ...
Leslie S. G. Kovasznay, René Chevray
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Hot wire anemometer operating at cryogenic temperatures

Review of Scientific Instruments, 1992
A micronic-size hot wire anemometer operating at cryogenic temperatures (4 K) has been developed; using superconducting and resistive thin films, its electrical resistance is very sensitive to the velocity of a gaseous 4He subsonic jet. The fabrication procedure is described and the measured characteristics are compared with a simple thermal ...
B. Castaing, B. Chabaud, B. Hébral
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Hot Wire and Hot Film Anemometers

1980
Hot wire and hot film sensors are used for measurements of fluctuations in the wind. Such anemometers are in competition with both mechanical and sonic anemometers. At least some of the mechanical sensors are more stable in calibration, and less expensive. The high frequency resolution of the hot wire/hot film sensors, however, cannot be matched by any
L. Hasse, M. Dunckel
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Hot Wire Anemometer in Liquid Mercury

Review of Scientific Instruments, 1965
A hot wire system has been developed which is suitable for operation in liquid mercury at speeds from 1 to 12 cm/sec. The wire was 38 μ diam tungsten with 2.5 μ thick enamel coating, used with 2 A heating current in constant current operation. The Nusselt number was determined experimentally as a function of Péclet number in the range 0<Pé& ...
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Linearizer for Constant Temperature Hot Wire Anemometer

Review of Scientific Instruments, 1966
Experiments to determine the heat transfer from hot wires with length-to-diameter ratios on the order of 102, which are commonly used in hot wire anemometry, were performed. The Reynolds numbers used were less than 10, the overheat ratio was kept at 0.80, and the fluid was air.
Francis H. Champagne, John L. Lundberg
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A simple hot wire anemometer probe

Journal of Physics E: Scientific Instruments, 1968
This note describes a simple hot wire probe found suitable for a wide range of anemometer applications.
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Low speed calibration of hot-wire anemometers

Flow Measurement and Instrumentation, 2007
Abstract A device for calibration of hot-wire anemometers at low velocities is described. The calibration technique is based on moving hot-wire probes in stagnant air. The device is relatively small, highly mobile and consists of a horizontal swing arm rotated by a DC motor.
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Calibration method for a hot wire anemometer

Journal of Physics E: Scientific Instruments, 1976
Describes a practical method for analysing the calibration of constant temperature hot wire anemometers whose output voltage is not linearized. This applies to a two-dimensional incompressible flow whose velocity ranges between 2 and 16 m s-1. For a single wire, normal to the flow direction, King's law written in the form U2= alpha + beta Vn is ...
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