RESEARCH ON WIND COMFORT INDEX OF CHANGSHA CITY BASED ON THE COUPLING OF THERMAL AND MECHANICAL EFFECTS OF WIND.

The current outdoor wind comfort index is mainly to evaluate the impact of the mechanical effect of wind on human body. In the actual outdoor human wind comfort evaluation, it is necessary to establish an index that considers the thermal effect of wind at the same time. Firstly, the coupling method of thermal and mechanical effects of wind is proposed, and 16 kinds of coupling relations between Soligo wind comfort index and UTCI thermal climate index are established; Secondly, Taking Changsha City as the research area, the applicability of UTCI index was analyzed and corrected by field meteorological observation and TSV questionnaire survey; Finally, the wind comfort evaluation index of Changsha under the dual coupling effect of wind is established. The results show that: the scale of UTCI without heat stress in Changsha is revised from [+9,+26] to [+15.4,+32.4]. When the probability of wind speed exceeding the threshold in spring meets P (v_a,h=1.5 > 2.5) ≤ 20%, it can meet all the requirements of human body wind comfort under sitting, standing and walking behavior; when the probability of wind speed exceeding the threshold in autumn meets P(v_a,h=1.5 > 2.5, v_a,h=1.5 < 1.25) ≤ 20% > P(v_a,h=1.5 > 3.8, v v_a,h=1.5 < 1.25) ≤ 20%, P(v_a,h=1.5 > 3.9, v_a,h=1.5 < 1.25) ≤ 20%, it can meet the requirements of human body wind comfort under sitting, standing and walking behavior respectively; It is hot in summer and cold in winter, wind environment in these two seasons cannot meet the requirements of human comfort. [ABSTRACT FROM AUTHOR]