A Wind Tunnel Experiment of Atmospheric Diffusion With Oscillating Wing Method (II). Wind Characteristics.:Wind Characteristics
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概要
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The lateral component of atmospheric turbulence v contains a low frequency component. Therefore horizontal plume spread increases with observation time. To simulate wide plume spread in a wind tunnel, the oscillating wing method was developed, in our previous study. In this method, low frequency turbulence is generated with the random oscillating motion of a wing row set at the inlet of a test section. One hour average plume spread pattern in a wind tunnel can be reproduced. In this study, artificially generated turbulence was examined for the presence of any unnatural features by comparing the results of a conventional wind tunnel experiment with atmospheric boundary layer data. Vertical distribution of average wind velocity, turbulence intensity and turbulence scales were essentially the same as atmospheric parameters. V component coherence functions between two points in a lateral direction were found to differ from those for natural wind. The vertical distribution of v-component correlation coefficients was found to be greater than that of natural wind or that by the conventional method.
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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