基于空调车厢内气流分布的人体热舒适研究

Thermal comfort study based on air distribution in air- conditioned train passenger compartment

利用带浮升力效应的K—ε湍流模型对空调硬座车内三维素流流动和传热进行了数值模拟。将人体散热和太阳辐射作为能量方程的附加源项,采用有限容积法将计算区域离散为均匀网格,用SIMPLE算法求解离散控制方程,研究了空调硬座车内空气流动速度、温度及热舒适性评价指标PMV分布规律。研究结果为空调车内气流组织的优化设计提供依据,对改善车厢内人体热舒适环境具有指导意义。图7,参8。

By K-ε turbulence model, the air fluid flow and heat transfer conjugated programs in air-conditioned compartment are resolved by finite volume method in interlacing grid with SIMPLE algorithm. The effect of solar radiation and body heat is taken into account and these auxiliary heat flows are the source term of the energy equation. The 3-D distributions of the airflow and temperature field and thermal comfort index PMV in the chamber are numerically simulated. The results have practical signification on the optimized design of air organization and improving the thermal comfort environment in the air-conditioned compartment. 7figs. ,8refs.