Spreading of aerosols in mixed convection in a generic passenger cabin

飞机或火车客舱的空调总是以创造舒适、安全的环境和适当的温度为目标。由于乘客的热负荷，通风系统将自然对流叠加到强制对流上。因此，会出现非常复杂且往往不稳定的流动结构，这会影响从当地来源传播的气溶胶，并可能导致气溶胶浓度较高的地区，从而增加病毒传播的风险。为了了解流动物理，该项目的目标是在独特的SCALEX设施中，在一个压力升高的缩小模型舱中，光学测量来自当地来源(乘客)的气溶胶的传播。此外，计划进行立体PIV测量，以详细说明基本的流场。与之前使用二维模型的研究不同，通用模型舱的特点是三维布置。该项目的成果旨在进一步完善未来安全出行的安全理念。

Air conditioning of passenger cabins in aircraft or trains aims always to generate a comfortable and safe environment with the appropriate temperature. Due to the heat load of the passengers natural convection is superimposed to the forced convection by the ventilation system. Thus very complex and often unstable flow structures occur, which affect the aerosol spreading from local sources and may lead to regions of higher aerosol concentrations and thus a higher risk of virus spreading. To understand the flow physics the project aims to optically measure the spreading of aerosols from local sources (passenger) in a downscaled model cabin under elevated pressures in the unique SCALEX-facility. In addition stereoscopic PIV measurement are planned to elaborate on the underlying flow fields. In contrast to previous studies, which use two-dimensional models the generic model cabin features a three-dimensional arrangement. The results of the project are intended to further improve future safety concepts for safe traveling.