Device for stirring up gas flowing through a duct having a structural insert positioned at an acute angle to a main gas stream
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United States of America Patent
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Oct 24, 2000
Grant Date -
N/A
app pub date -
Jan 14, 1999
filing date -
May 11, 1998
priority date (Note) -
Expired
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Abstract
A device for stirring up gas flowing through a duct (2) accommodating one or more flat insertion structures (1) positioned at an acute angle to the main gas stream. Each structure constitutes an eddy-generating surface with a freely washed forward edge directed toward the oncoming gas and facing partly along and partly across the flowing gas. Each structure can be contoured in cross-section. The object is to decrease the weight of the structures. Each structure is accordingly basically a trapezium with two parallel edges of different length, the shorter edge of the installed structure facing upstream and the longer edge provided with an aerodynamic sweep and facing downstream. The structure is also accordingly folded along three straight lines (3) to form an .omega. or w in cross-section, with two convex folds (5) flanking a single concave fold (4).
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