Bearing friction effect on cup anemometer performance modelling

Alfonso Corcuera, Daniel and Pindado Carrion, Santiago and Ogueta Gutierrez, Mikel and Sanz Andres, Angel Pedro (2021). Bearing friction effect on cup anemometer performance modelling. "Journal of Physics: Conference Series", v. 2090 ; ISSN 1742-6596. https://doi.org/10.1088/1742-6596/2090/1/012101.

Description

Title: Bearing friction effect on cup anemometer performance modelling
Author/s:
  • Alfonso Corcuera, Daniel
  • Pindado Carrion, Santiago
  • Ogueta Gutierrez, Mikel
  • Sanz Andres, Angel Pedro
Item Type: Article
Título de Revista/Publicación: Journal of Physics: Conference Series
Date: 2021
ISSN: 1742-6596
Volume: 2090
Subjects:
Faculty: Instituto de Microgravedad Ignacio Da Riva (UPM)
Department: Sistemas Aeroespaciales, Transporte Aéreo y Aeropuertos
Creative Commons Licenses: Recognition - No derivative works

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Abstract

In the present work, the effect of the friction forces at bearings on cup anemometer performance is studied. The study is based on the classical analytical approach to cup anemometer performance (2-cup model), used in the analysis by Schrenk (1929) and Wyngaard (1981). The friction torque dependence on temperature was modelled using exponential functions fitted to the experimental results from RISØ report #1348 by Pedersen (2003). Results indicate a logical poorer performance (in terms of a lower rotation speed at the same wind velocity), with an increase of the friction. However, this decrease of the performance is affected by the aerodynamic characteristics of the cups. More precisely, results indicate that the effect of the friction is modified depending on the ratio between the maximum value of the aerodynamic drag coefficient (at 0º yaw angle) and the minimum one (at 180º yaw angle). This reveals as a possible way to increase the efficiency of the cup anemometer rotors. Besides, if the friction torque is included in the equations, a noticeable deviation of the rotation rate (0.5-1% with regard to the expected rotation rate without considering friction) is found for low temperatures.

More information

Item ID: 69264
DC Identifier: https://oa.upm.es/69264/
OAI Identifier: oai:oa.upm.es:69264
DOI: 10.1088/1742-6596/2090/1/012101
Official URL: https://iopscience.iop.org/article/10.1088/1742-6596/2090/1/012101
Deposited by: Biblioteca ETSI Aeronauticos
Deposited on: 14 Dec 2021 15:21
Last Modified: 26 Apr 2022 15:53
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