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Visualizing Airflow Using the Fan Assessment Numeration System (FANS)

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  2012 Dallas, Texas, July 29 - August 1, 2012  121337883.(doi:10.13031/2013.41843)
Authors:   Michael P Sama, Gabriela M Morello, Igor M Lopes, George B Day, Douglas G Overhults
Keywords:   FANS, Data Processing, Data Visualization, Filtering, Air Flow

A filtering and interpolation technique was investigated for generating 2-D contour plots from raw Fan Assessment Numeration System (FANS) data. Airflow data was acquired at average static pressures varying from 4.4 Pa to 51.7 Pa. High frequency noise was removed using a digital low-pass filter prior to interpolation using a bi-cubic method. The cutoff frequency of the low-pass filter was shown to have a large effect on the amount of noise present in the 2-D contour plot as well as how well trends were preserved. A cutoff frequency of 0.1 Hz was determined to be adequate removing enough system noise without distorting the underlying process. The shape of the airflow distribution was consistent throughout all static pressure tests and could simply be scaled to compensate for static pressure.

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