论文标题
使用EMU-320模型列车对积雪的特征进行实验研究
Experimental investigations on the characteristics of snow accretion using the EMU-320 model train
论文作者
论文摘要
本文提出了在气候风洞中进行的积雪测试，以研究模型列车上的结冰过程。该实验中使用的模型是eMU-320的清理和2/3尺度版本，该版本是韩国的高速列车。该模型是无电子电源或热源的设计，因此车轮不会旋转，并且由于热源而不会发生积雪。为了研究积雪，在铁路TEC阿森纳的气候风洞中考虑了四个具有不同环境温度的病例。在分析火车上的积雪之前，测量了雪和液态水含量，以便将它们用作模拟的输入条件，并确保对结冰过程的分析基于雪的特征。获得定性数据和定量数据，从而将照片用于定性分析，并且使用模型上积雪的密度以及积雪的厚度用于定量分析。根据视觉观察，推断出随着环境温度的升高，积雪的范围更广泛。模型鼻子上积聚的积雪厚度是-3 oC的上部和下部最大的，中部是-5 oC的中间部分。此外，观察到积雪的横截面是沟渠样的。观察到类似的结冰过程发生在鼻子的斜率上。雪都在转向架的所有组成部分上积聚，在所有情况下，车轮的雪厚度最大，弧形角为40至70 O。这些实验条件的详细数据可以作为模拟的输入，以改善冰条件的模拟。因此，他们可以促进为火车开发适当的抗冰设计
This paper presents a snow accretion test conducted in a climate wind tunnel to investigate the icing process on a model train. The model used within this experiment was the cleaned-up and 2/3-scaled version of EMU-320, which is a high-speed train in Korea. The model was designed without an electronic power source or heat source so that the wheels did not rotate and snow accretion on the model did not occur due to heat sources. To investigate snow accretion, four cases with different ambient temperatures were considered in the climate wind tunnel on Rail Tec Arsenal. Before analyzing the snow accretion on the train, the snow flux and liquid water content of snow were measured so that they could be used as the input conditions for the simulation and to ensure the analysis of the icing process was based on the characteristics of the snow. Both qualitative and quantitative data were obtained, whereby photographs was used for qualitative analysis, and the density of the snow sample and the thickness of snow accreted on the model were used for quantitative analysis. Based on the visual observations, it was deduced that as the ambient temperature increased, the range of the snow accreted was broader. The thickness of snow accreted on the model nose was the largest on the upper and lower part at -3 oC, and on the middle part at -5 oC. Additionally, the cross section of snow accreted was observed to be trench-like. Similar icing processes were observed to occur on the slope of nose. Snow accreted on all components of the bogie, and for all cases, the thickness of snow at wheel was the largest at an arc angle of 40 to 70 o. These detailed data of experimental conditions can be applied as an input to simulations to improve simulations of ice conditions. Thus, they can facilitate the development of appropriate anti-icing designs for trains
