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风速频谱对人体热舒适性的影响
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Impact of wind spectra on human thermal comfort
摘要 研究了自然风与机械风频谱的区别及对热舒适的影响。研究发现自然风的频谱在低频区较机械风丰富。提出了一种模拟自然风频谱的方法，并利用此方法研究了频谱形状及吹风频率上下限对人体热舒适性的影响。主观问卷实验表明：接近于自然风频谱的吹风模式比其它吹风模式有更好的可接受性。同时发现人体对吹风频率感受的上限在1Hz附近，而频率下限在0.244～0.488mHz范围内时吹风有较好的可接受性。
关键词 频谱；自然风；热舒适
Abstract Comparison of the power spectra of natural wind and artificial air movement showed that the natural wind spectra has many more low frequency variations than artificial airflow. Thorefore a new method was developed for generating air movements with the same velocity spectra as natural wind. Air flows generated with the new method were used to assess the impact of the spectra shape and the upper and lower frequency limits on human thermal comfort. The subjective experiments indicate that the upper frequency limit for thermal comfort is about 1 Hz and the lower frequency limit is about 0.244～0.488 mHz and that air movement with spectra similar to that of natural wind is more suitable for thermal comfort than other air movement modes.
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