非均匀热环境下热舒适评价的两种方法及其关键技术

针对非均匀热环境下乘员热舒适性的评价问题,提出当量温度评价指标(EQT)和当量均匀温度评价指标(EHT);完成这两种评价指标的关键技术在于如何进行流场的三维Navier-Stokes方程与人体的生物热方程之间的耦合迭代。在进行数值计算时发现:流场计算时人体皮肤表面给温度分布(即提D irichlet问题)、人体的生物热方程求解时给热流密度分布(即提Neumann问题),采用其边界条件的提法后,使得非均匀热环境下的流场与人体生物热方程之间的大迭代容易收敛和稳定。典型算例表明:对同一种物理问题,尽管两种评价下所得到的当量温度不同,但得出的评价效果是一致的,这就从侧面显示了这两种评价方法的一致性与有效性。

Two Methods for the Evaluation of Human Thermal Comfort under Non-homogeneous Thermal Environment and Their Key Technology

To evaluate the human thermal comfort in non-homogeneous thermal environment,the comfort indexes of EQT(Equivalent Temperature) and EHT(Equivalent Homogeneous Temperature) are put forward.It is pointed out that the key technique to obtain the two indexes is how to fulfill the coupled-iteration calculation between 3-dimensional Navier-Stokes equation in flow field and human body bio-heat equation.During the numerical calculation,it is found that the supplied-temperature distribution on human skin surface(namely Dirichlet equation) and the supplied heat-flux density distribution(namely Neumann question) in solving human bio-heat equation make the iteration calculation more convergent and stability between the flow field and the human body bio-heat equation under non-homogeneous thermal environment.Typical examples indicate that the equivalent temperatures from the two indexes are different for the same physical issue,but the result obtained by the two evaluation methods is in accord,which reveals the definitions of the two indexes are feasible and effective.