THESIS
1996
Abstract
A regression model for predicting mechanical turbulence in Chek Lap Kok (CLK), Lantau island, Hong Kong was developed. CLK is situated at a very complex terrain about which researches on turbulence prediction were very scarce. The model facilitates the prediction of turbulence at complex terrain since only mean wind and nine terrain parameters are necessary. The terrain parameters can be determined easily by using a contour map or digital map. The data used to develop the model was measured by an acoustic sodar with 15min integration time and 50m gate length. The model can predict with 90% accuracy when turbulence is predominantly mechanical, e.g. flow separation behind obstacles, or with 70% accuracy when the turbulence is caused partially by convective effect and partially by mechanic...[
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A regression model for predicting mechanical turbulence in Chek Lap Kok (CLK), Lantau island, Hong Kong was developed. CLK is situated at a very complex terrain about which researches on turbulence prediction were very scarce. The model facilitates the prediction of turbulence at complex terrain since only mean wind and nine terrain parameters are necessary. The terrain parameters can be determined easily by using a contour map or digital map. The data used to develop the model was measured by an acoustic sodar with 15min integration time and 50m gate length. The model can predict with 90% accuracy when turbulence is predominantly mechanical, e.g. flow separation behind obstacles, or with 70% accuracy when the turbulence is caused partially by convective effect and partially by mechanical effect. The technique used to develop the model can be applied equally well to other sites to obtain another specific equations for that site. One of the major applications of this model is to predict turbulence for air pollution study in a complex-terrain region since more often than not, air-pollution study requires wind tunnel simulation of the region to locate the turbulence spot and to determine the magnitude of the turbulence.
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