Gas sampling efficiencies and aerodynamic characteristics of a laboratory wind tunnel for odour measurement

Sohn, J. H. and Smith, R. J. and Hudson, N. A. and Choi, H. L. (2005) Gas sampling efficiencies and aerodynamic characteristics of a laboratory wind tunnel for odour measurement. Biosystems Engineering, 92 (1). pp. 37-46. ISSN 1537-5110

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The rate of odour emission depends on meteorological factors, such as wind speed, humidity and temperature,
but no wind tunnels control these factors adequately. A novel laboratory wind tunnel was developed that can control airflow rate. The gas recovery efficiency of the tunnel was evaluated and the aerodynamic characteristics were then examined to further assess its performance. Gas recovery efficiencies ranged from 62 to 107% with an average of 81%. The optimal performance of the tunnel (gas recovery efficiency of 89%) occurred at an airflow rate and CO supply rate of 1.68m3 min-1 and 10.0 l min-1, respectively. The vertical and cross-sectional wind speed profiles exhibited a substantial degree of non-uniformity. The airflow was turbulent, although Reynolds numbers were low indicating it to be close to laminar. The non-uniform wind
speed profiles and CO concentration profiles illustrate the difficulty in obtaining representative samples from which to calculate emission rates. Further work is required to improve aerodynamic characteristics and hence performance of the tunnel.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author version deposited in accordance with the copyright policy of the publisher.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 11 Oct 2007 00:18
Last Modified: 02 Jul 2013 22:31
Uncontrolled Keywords: odour emissions; measurement; wind tunnel; gas sampling efficiencies
Fields of Research : 09 Engineering > 0901 Aerospace Engineering > 090199 Aerospace Engineering not elsewhere classified
09 Engineering > 0901 Aerospace Engineering > 090101 Aerodynamics (excl. Hypersonic Aerodynamics)
04 Earth Sciences > 0401 Atmospheric Sciences > 040107 Meteorology
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: 10.1016/j.biosystemseng.2005.05.010

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