中文摘要：

本文设计和搭建了腔体壁温随时间作周期性变化条件下瞬态自然对流换热实验台，对充满水的倾斜腔体，在其一侧壁温维持恒定值、而相对侧壁面温度以此恒定值为时均值并按一定的幅值随时间变化的情况下，实验研究了周期性壁温变化和腔体倾角对腔体内的瞬态自然对流换热规律的影响。实验结果表明通过腔体的净热流总是从腔体的较低壁面指向较高壁面。

英文摘要：

An experimental setup is designed to investigate the transient natural convection in an inclined enclosure submitted to time-periodically-varying wall temperature. For the water-filled enclosure with the time-periodically-varying wall temperature on one side wall and constant average temperature on the opposing side wall, the effects of wall temperature oscillation and the inclined angle of the enclosure on transient heat transfer characteristics are experimentally studied. The experimental results show that net heat flux across the enclosure is always transferred from the lower side wall to the upper side wall.