Effective Thermal Conductivity of Cloth With Moisture Diffusion

湿气扩散布的有效导热率

• 批准号: 11650203
• 负责人: TAKAHASHI Kaneko
• 金额: $ 0.96万
• 依托单位: Akita University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650203/
• 关键词: Cloth; Moisture Diffusion; Heat Transfer Model; Thermal Conductivity; Thermal Diffusivity; 接触熱抵抗

Main results obtained in this study are as follows :1. Improvement of experimental appratus and experiment by using local hygrometerIn the piled cloths, there are the differences between total mean effective thermal conductivity and local one. To clear these phenomena, we had been developed the local hygrometer that could measure humidity values at arbitrary position in the piled cloths.We found out qualitative trend, but the data have large scattering. Therefore, we must do more accurate experiment to obtain the quantitative correlation.2. Propose of the improved piled cloth model and numerical simulationThe improved model for piled cloths and fibrous composite matrerials has been proposed. The temperature responce and evaluation of thermal diffusivity were studied on the period-ical heating phenomena by using numerical simulation based on finite difference method. Investigated factors were thermal diffusivity, heat capacity of component materials and period of temperature wave. A new method to evaluate thermal diffusivity was also proposed by measuring the amplitude at the rear surface of specimen having finite thickness.

本研究的主要结果如下：1.用局部湿度计改进实验装置和实验在堆积的织物中，总平均有效导热系数与局部平均有效导热系数存在差异。为了解决这一问题，我们研制了局部湿度计，可以测量堆积在布料中任意位置的湿度值，虽然得到了定性的趋势，但数据分散性较大。因此，必须做更精确的实验来获得定量的相关性.改进的堆布模型的提出及数值模拟提出了堆布和纤维复合材料的改进模型。采用有限差分法对周期性加热现象进行了数值模拟，研究了温度响应和热扩散率的估算。考察的因素有热扩散率、组成材料的热容和温度波的周期。提出了一种通过测量有限厚度试件后表面的振幅来评价热扩散率的新方法。

项目成果

高橋カネ子,山田悦郎,佐々木謙: "周期的温度変動に対する繊維質材料の応答と温度伝導率"第21回日本熱物性シンポジウム講演論文集. 21巻. 108-109 (2000)

Kaneko Takahashi、Etsuro Yamada、Ken Sasaki：“纤维材料对周期性温度波动的响应和热导率”第 21 届日本热物理性能研讨会论文集第 21 卷 108-109（2000 年）。

高橋カネ子,山田悦郎,佐々木謙: "周期的温度変動に対する繊維質材料の応答と温度伝導率(統報)"日本機械学会東北支部第36期総会・講演会講演論文集. 011・1. 158-159 (2001)

高桥金子、山田悦郎、佐佐木健：“纤维材料对周期性温度波动的响应和热导率（报告）”第36届日本机械工程学会东北分会会议记录和演讲011・1。 -159 (2001)

K.Takahashi, E.Yamada and K.Sasaki: "RESPONSE AND THERMAL DIFFUSIVITY OF FIBER ON PERIODICAL HEATING (1st Report)"The 21st Japan Symposium on Thermophysical Properties. Vol.21. 108-109 (2000)

K.Takahashi、E.Yamada 和 K.Sasaki：“纤维对周期性加热的响应和热扩散性（第 1 份报告）”第 21 届日本热物理性质研讨会。

K.Takahashi, E.Yamada and K.Sasaki: "RESPONSE AND THERMAL DIFFUSIVITY OF FIBER ON PERIODICAL HEATING (2nd Report)"The 36th Tohoku Symposium on JSME. Vol.011 1. 158-159 (2001)

K.Takahashi、E.Yamada 和 K.Sasaki：“纤维对定期加热的响应和热扩散性（第二次报告）”第 36 届东北 JSME 研讨会。