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Quantitative Estimation of Transient Thermal Sensation under Unsteady Thermal Environments

非稳态热环境下瞬态热感觉的定量估计

基本信息

批准号：
12555058
负责人：
MASUOKA Takashi
金额：
$ 6.08万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

1. Transient behaviors of thermal sensation under unsteady thermal environmentsA new voting method for the evaluation of the transient thermal sensation that is applicable to unsteady thermal environments was proposed and the transient behaviors of thermal sensation were examined by utilizing an experimental test room of 3200x2250 mm in width and of 2700 mm in height placed in Kyushu University. The correlation between the rate of environmental temperature change and the transient thermal sensation was elucidated, where the time delay of the transient thermal sensation under unsteady thermal environments was found.2. Correlation between thermal sensation under unsteady thermal environments and such physiological parameters as the skin surface temperature, surface heat flux and blood flow rate as well as thermal environmental parametersThermal infrared-image viewer and a laser-doppler blood-flow meter were utilized to make measurements of skin-surface temperature and skin blood-flow rate, which were confirmed to have time delay relative to the time change of environmental temperature.3. Examination of Physiological data on transient thermal sensation by a porous medium equivalent bio-heat equation modelA bio-heat equation model, which considers momentum equation for blood flow field through capillary vessels, was proposed, where blood flow rate was automatically adjusted with assumption of temperature-dependent equivalent permeability for the capillary vessels. The predicted time delay of numerical skin surface temperature was confirmed as of the order of the experimental one. It was concluded that the transient behaviors of thermal sensation can be evaluated fundamentally with the unsteady local skin-surface temperature behaviors, which will be estimated experimentally with infrared thermometer or numerically with computer.

1. 提出了一种适用于非定常热环境下的暂态热感觉评价投票方法，并利用位于九州大学的3200x2250mm宽、2700mm高的实验试验室，对暂态热感觉的暂态行为进行了研究。阐明了环境温度变化率与瞬态热感觉之间的关系，得到了非定常热环境下瞬态热感觉的时滞。2 .非定常热环境下热感觉与皮肤表面温度、表面热流密度、血流速率等生理参数及热环境参数的相关性利用热红外图像观测器和激光多普勒血流仪测量皮肤表面温度和皮肤血流速率，证实皮肤表面温度和血流速率相对于环境温度的时间变化有时间延迟。提出了一种考虑毛细血管血流场动量方程的生物热方程模型，在假设毛细血管的等效渗透率随温度变化的情况下自动调节血流速率。数值皮肤表面温度的预测延时与实验延时相同。得出结论：热感觉的瞬态行为可以用局部非定常的皮肤表面温度行为来基本评价，可以用红外测温仪进行实验或用计算机进行数值计算。