Loughborough University
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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/6674

Title: Design methodology and performance of an indraft wind tunnel
Authors: Johl, G.
Passmore, M.A.
Render, Peter M.
Issue Date: 2004
Publisher: © Royal Aeronautical Society
Citation: JOHL, G., PASSMORE, M.A. and RENDER, P.M., 2004. Design methodology and performance of an indraft wind tunnel. The Aeronautical Journal, 108 (1087), pp. 465-473.
Abstract: The design methodology and performance of Loughborough University’s new 1·9m × 1·3m, indraft wind tunnel is discussed in the following paper. To overcome severe spatial and financial constraints, a novel configuration was employed, with the inlet and exit placed adjacent to each other and opened to atmosphere. Using a fine filter mesh, honeycomb, two turbulence reduction screens and a contraction ratio of 7·3, flow uniformity in the working area of the jet at 40ms-1 is shown to be within 0·3% deviation from the mean velocity, with turbulence intensity in the region of 0·15%. Working section boundary layer characteristics are shown to be consistent with that of a turbulent boundary layer growing along a flat plate, which originates at the point of inflection of the contraction. A maximum velocity of 46ms-1 was achieved from a 140kW motor, compared to a prediction of 44ms-1, giving an energy ratio of 1·42. Comparison between theoretical and measured performance metrics indicate differences between the way modules perform when part of a wind tunnel system compared to data gathered from test rigs.
Version: Published
URI: https://dspace.lboro.ac.uk/2134/6674
Publisher Link: http://www.raes.org.uk/aero_journal.asp
ISSN: 0001-9240
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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