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摘要 以某地下大型厂房为例，把弗劳德数转化成具有相同物理意义的热量阿基米得数，对顶部送风系统模型试验所测的数据运用数理统计的方法进行适当的处理与分析，得出了模型与原型的气流流动都处于弗劳德数自模区的重要结论。 关键词 大空间建筑　顶部送风 模型试验 弗劳德数 热量阿基米得数 自模区 Experimental estimation of self-similarity in model experiment of top supply air system in large-space buildings By Zhang Zhi★, Yu Yufeng and Xiong Hanlin Abstract Taking an underground large-space workshop as an example, converts the Froude number into the thermal Archimedes number with similar physical meaning, by means of mathematical statistics deals with and analyses appropriately the data tested in the model experiment, and concludes that the air flowing in model and prototype is both in self-similarity of the Froude number. Keywords large-space building, top supply air, model experiment, Froude number, thermal Archimedes number, self-similarity ★ Anhui Industrial University, Maanshan, Anhui Province, China