ESDU 84011:2012

$126.75

Wind Speed Profiles Over Terrain with Roughness Changes

Published By	Publication Date	Number of Pages
ESDU	2012-02	51

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Category: ESDU

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ESDU 84011 provides a simplified method of estimating the
variation of design wind speed (mean-hourly or gust values) with
height about the ground and with terrain roughness. The data for
flat terrain (which are based on relationships given in ESDU 82026
and 83045) are presented in the form of tables giving a factor (K)
by which a wind speed at 10 m (33 ft) over open country terrain
must be multiplied to give the wind speed at the required height
over the site in question. K-factors are provided for a range of
heights up to 400 m (1310 ft), gust averaging times and
combinations of terrain roughness at the site with a single change
in roughness at varying distances upwind of the site. It is also
shown how the tabulated data can be used to generate wind speed
profile data for multiple changes in terrain roughness. ESDU 84030
complements ESDU 84011 by providing values of turbulence intensity
for all cases for which ESDU 84011 provides wind speed data. ESDU
01008 introduces a computer program, VIEWpac E0108, that calculates
the values given here using the full methods from which the
simplified methods used in ESDU 82026 and 83045 were derived; that
program also includes topographic effects.


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Published Code	ESDU
Published By	ESDU
Publication Date	2012-02
Pages Count	51
Language	English
File Size	7.9 MB
ISBN	9780856794735

ESDU 84011:2012

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