Cup Anemometer Overspeeding
نویسندگان
چکیده
منابع مشابه
On Cup Anemometer Rotor Aerodynamics
The influence of anemometer rotor shape parameters, such as the cups' front area or their center rotation radius on the anemometer's performance was analyzed. This analysis was based on calibrations performed on two different anemometers (one based on magnet system output signal, and the other one based on an opto-electronic system output signal), tested with 21 different rotors. The results we...
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The calibration coefficients of two commercial anemometers equipped with different rotors were studied. The rotor cups had the same conical shape, while the size and distance to the rotation axis varied. The analysis was based on the 2-cup positions analytical model, derived using perturbation methods to include second-order effects such as pressure distribution along the rotating cups and fric...
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The results of several research campaigns investigating cup anemometer performance carried out since 2008 at the IDR/UPM Institute are included in the present paper. Several analysis of large series of calibrations were done by studying the effect of the rotor's geometry, climatic conditions during calibration, and anemometers' ageing. More specific testing campaigns were done regarding the cup...
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................................................................................................................................ i Acknowledgement ............................................................................................................... ii List of Table ........................................................................................................................ ...
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The advantageous employment of multimode fibres for beam delivery in laser Doppler anemometers (LDA) is presented. Multimode fibres allow the transfer of significantly higher power into the LDA measurement volume and need lower alignment effort compared to the usually employed singlemode fibres. Powerful laser diodes can now be applied for LDA set-ups, enabling sensitive velocity measurements o...
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ژورنال
عنوان ژورنال: Journal of Applied Meteorology
سال: 1976
ISSN: 0021-8952
DOI: 10.1175/1520-0450(1976)015<1328:cao>2.0.co;2