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An instrument for measuring turbulence during wind erosion

Smith, Stewart Ellis (1996) An instrument for measuring turbulence during wind erosion. PhD thesis, Murdoch University.

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Abstract

While some of the properties of turbulence have long been measured under laboratory conditions, current instruments are not suitable for use in the sand-blasting conditions that arise during wind erosion. This thesis describes the design and construction of a new instrument for such conditions. The instrument measures three components of wind velocity using pressure techniques. The thesis presents background material regarding the characterisation of turbulent and eroding flows, the design of pressure probes, and the modelling of pressure propagation in tubes. A mathematical model is developed to allow compensation for the complex effect of the tubing systems. This permits measurement of turbulent velocity fluctuations of the order of 100Hz. Algorithms for real-time signal processing are described. The results of calibration and testing of the instrument are discussed.

Item Type: Thesis (PhD)
Murdoch Affiliation: School of Biological and Environmental Sciences
Notes: Note to the author: If you would like to make your thesis openly available on Murdoch University Library's Research Repository, please contact: repository@murdoch.edu.au. Thank you.
Supervisor(s): Scott, William
URI: http://researchrepository.murdoch.edu.au/id/eprint/52753
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