Effect of the Wake of the Transducer Supports on the Ultrasonic Anemometer Measurements

Franchini, Sebastian Nicolas and Cuerva Tejero, Alvaro and Sanz Andres, Angel Pedro (2012). Effect of the Wake of the Transducer Supports on the Ultrasonic Anemometer Measurements. In: "The 2012 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM' 12)", 26/08/2012 - 30/08/2012, Seoul, Korea. ISBN 978-89-89693-34-5. pp. 2643-2659.

Description

Title: Effect of the Wake of the Transducer Supports on the Ultrasonic Anemometer Measurements
Author/s:
  • Franchini, Sebastian Nicolas
  • Cuerva Tejero, Alvaro
  • Sanz Andres, Angel Pedro
Item Type: Presentation at Congress or Conference (Article)
Event Title: The 2012 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM' 12)
Event Dates: 26/08/2012 - 30/08/2012
Event Location: Seoul, Korea
Title of Book: Proceedings of The 2012 World Congress on Advances in Civil, Environmental, and Materials Research (ACEM' 12)
Date: 2012
ISBN: 978-89-89693-34-5
Subjects:
Faculty: E.U.I.T. Aeronáutica (UPM)
Department: Tecnologías Especiales Aplicadas a la Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The wake produced by the structural supports of the ultrasonic anemometers (UAs)causes distortions in the velocity field in the vicinity of the sonic path. These distortions are measured by the UA, inducing errors in the determination of the mean velocity, turbulence intensity, spectrum, etc.; basic parameters to determine the effect of wind on structures. Additionally, these distortions can lead to indefinition in the calibration function of the sensors (Cuerva et al., 2004). Several wind tunnel tests have been dedicated to obtaining experimental data, from which have been developed fit models to describe and to correct these distortions (Kaimal, 1978 and Wyngaard, 1985). This work explores the effect of a vortex wake generated by the supports of an UA, on the measurement of wind speed done by this instrument. To do this, the Von Karman¿s vortex street potential model is combined with the mathematical model of the measuring process carried out by UAs developed by Franchini et al. (2007). The obtained results are the correction functions of the measured wind velocity, which depends on the geometry of the sonic anemometer and aerodynamic conditions. These results have been validated with the ones obtained in a wind tunnel test done on a single path UA, especially developed for research. The supports of this UA have been modified in order to reproduce the conditions of the theoretical model. Good agreements between experimental and theoretical results have been found.

More information

Item ID: 19763
DC Identifier: http://oa.upm.es/19763/
OAI Identifier: oai:oa.upm.es:19763
Official URL: http://nanotechcssp.wordpress.com/2012/12/26/the-2012-world-congress-on-advances-in-civil-environmental-and-materials-research-coex-seoul-korea-26-30-august-2012/
Deposited by: Memoria Investigacion
Deposited on: 29 Apr 2014 18:21
Last Modified: 21 Apr 2016 21:07
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