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CFD study on Computational Thermal Manikin

计算热模型的CFD研究

基本信息

批准号：
07505006
负责人：
MURAKAMI Shuzo
金额：
$ 26.94万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07505006/
关键词：
Computational thermal manikin Metabolic heat transfer Experiment metabolic Numerical simulation breathing Coupled convection and radiation 気流熱移動熱快適性

项目摘要

In this research, we developed a new model of evaluating the thermal comfort "Computational Thermal Manikin" by CFD.This year the follows have been conducted.(1) Measurement by using an experimental thermal manikinTemperature and flow fields around a human body have been conducted by using a Low-Re Number K-epsilon model. To evaluate the precision of the numerical calculation, measurement of the temperature and velocity boundary layr is being done on an experimental thermal manikin. Thus, the convective heat transfer characteristics around the human body will be mastered.(2) Coupled Convection and Radiation Simulation of the Computational thermal manikinTo clarify the sensible heat transfer characteristics between the human body and his environment,coupled convective and radiant simulation is being conducted. From the complicated shape of the human body, the view factor is calculated by Monte Method. Gebhart absorption coefficient is used. The air flow simulation is based on Low-Re Number k-epsilon model.(3) Inclusion the breathing and modelling of the latent heat transferThe breathing must be including in the air simulation. Moisture transfer is also considered by using the concept of wettednes on treatment of the sweat on the skin surface of the human body. Thus the total heat transfer between the human body and the environment can be decided by using these coupled simulations.

在本研究中，我们开发了一种新的基于CFD的热舒适性评估模型“计算热人体模型”。今年开展了以下活动：(1)采用实验热人体模型测量人体周围的温度场和流场，采用低re数K-epsilon模型进行。为了评价数值计算的精度，在实验热模型上对边界层温度和速度进行了测量。从而掌握人体周围的对流换热特性。(2)计算热人体的对流与辐射耦合模拟为了弄清人体与环境之间的显热传递特性，进行了对流与辐射耦合模拟。从人体复杂的形状出发，用蒙特卡罗法计算了视觉因子。采用格哈特吸收系数。气流模拟采用低re数k-epsilon模型。(3)包括呼吸和潜热传递建模。空气模拟中必须包括呼吸。通过使用润湿剂的概念来处理人体皮肤表面的汗液，也考虑了水分转移。因此，利用这些耦合模拟可以确定人体与环境之间的总传热。