The indoor thermal environment of a large-scale building was analyzed through CFD and experiments under the condition of stratified airflow caused by spherical vents. Besides, another simulation of its similar building which dimensions are 4 times larger would be handled based on similarity method to get a suitable setting method. It showed standard k-emodel could be used for this and the results between simulations and experiments are acceptable with relative error less than 5% ( vertical temperature distribution of room center, plane temperature distribution of 1. 7m high) . This study is of reference significance to the application of similarity method on CFD and to simulations of large scale buildings.%以某大空间热环境试验基地为分析对象,运用试验测试和数值模拟的方法,设置大空间原型数值计算条件并分析喷嘴送风工况下的室内热环境;在此基础上建立了4倍于原试验建筑几何尺寸的大空间模型,并应用相似理论,给出了适合于该放大空间建筑数值计算的边界条件.数值计算和实测结果表明,标准k-ε模型可以用于描述该大空间建筑的湍流特性;室内典型位置处温度的实验测试结果与原型及放大模型的数值计算结果基本吻合,平均相误差均小于5％.可以认为,本文建立的大空间热环境相似关系可以为数值模型实验提供适当的边界条件,为数值计算在大空间热环境的拓展研究提供思路.
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