Analysis of Surface Layer Turbulence Intensity along Lianyungang Coastland
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Abstract:
Based on the statistical results of strong winds (above Grade 8 in Beaufort scale ) from 15 meteorological observation stations from 2000 to 2009, the spatialtemporal distribution feature of wind turbulence intensity at the Lianyungang’s coastal region is discussed with wind data from 6 wind gradient towers around the coastal region of Lianyungang from 2005 to 2007 The characteristics of strong wind turbulence intensity caused by different weather systems and their influence on wind farm are analyzed. The results show that the wind turbulence intensity has obvious seasonal change，larger in summer and smaller in winter, decreasing with increasing altitude; the influence of surface roughness over the sea on strong turbulence is different from that over land with breeze; wind and turbulence intensity may change suddenly in the same time in the tropical cyclone region; the strong turbulence appears usually above the altitude of 30 m over sea and near the ground on land respectively, which is also found in strong wind turbulence caused by different weather systems; and the characteristic value of 21% to 38% turbulence intensity exceeds the design criterion of the maximum turbulence intensity for fans at the altitude of fan wheels, which suggests that the parameter of fan maximum turbulence intensity should be adjusted to 0.31 to 0.41 around the coastal region of the central and northern parts of East China.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.