The present research investigated theoretically and experimentally the transverse temperature profiles of spill buoyant plume ejected from a fire compartment, as well as the thermal characteristic difference between the transverse and lateral direction. The previous literatures only focused on the vertical and lateral (normal to facade) temperature profiles; although the transverse (parallel to facade) temperature profiles will also have a significant impact on the thermal expansion, and it could be essentially different from the lateral temperature profile due to the existence of facade (air entrainment restricted), however, this topic has not been revealed yet. Hence, in present study, the plume thickness of transverse direction was theoretically analyzed, and a model for transverse temperature profile using the Gaussian function was established using the new effective plume thickness. Experiments were then conducted by using a reduced-scaled fire compartment with one opening attached on the facade wall. The transverse and lateral temperature profile of the spill fire plume along the facade wall were measured and analyzed. The model for transverse temperature profile can be well verified by obtained data. And it is found that the transverse temperature decay slower than the lateral temperature due to the Coanda effect caused by the one-side air entrainment. The obtained experimental data and proposed transverse temperature profile function in this work provide a basic understanding for the thermal characteristics of spill buoyant plume ejected from a fire compartment, and the proposed function can be applied to predict the spread possibility of building facade fire.

本研究从理论上和实验上研究了从防火隔间喷出的溢出浮力羽流的横向温度分布，以及横向和横向之间的热特性差异。以前的文献只关注垂直和横向（垂直于立面）的温度曲线；虽然横向（平行于立面）温度曲线也会对热膨胀产生显着影响，并且由于立面（空气夹带受限）的存在，它可能与横向温度曲线有本质的不同，但是，这个话题还没有尚未揭晓。因此，在本研究中，理论上分析了横向羽流厚度，并使用新的有效羽流厚度建立了使用高斯函数的横向温度剖面模型。然后通过使用缩小比例的防火隔间进行实验，该防火隔间在外墙上附有一个开口。测量和分析了沿立面墙的溢出火羽的横向和横向温度分布。得到的数据可以很好地验证横向温度剖面模型。并且发现由于一侧引气引起的附壁效应，横向温度衰减比横向温度慢。在这项工作中获得的实验数据和提出的横向温度分布函数为从防火隔间喷出的溢出浮力羽流的热特性提供了基本的理解，