Pirrone Serena R M, Agabiti Camilla, Pagan Adam S, Herdrich Georg
Bioinspired Soft Robotics Laboratory, Istituto Italiano di Tecnologia (IIT), Via Morego 30, 16163 Genova, Italy.
The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy.
Materials (Basel). 2022 Feb 17;15(4):1505. doi: 10.3390/ma15041505.
A preliminary thermal 1D numerical model for studying the demise behavior of stainless steel 316L, silicon carbide (SiC) and carbon fiber reinforced polymer (CFRP) during uncontrolled atmospheric entry is proposed. Test case modeling results are compared to experimental data obtained in the framework of ESA Clean Space initiative: material samples were exposed to different heat flux conditions using the Plasma Wind Tunnel (PWT) facilities at the Institute of Space Systems (IRS) of the University of Stuttgart. This numerical model approximates the heating history of the selected materials by simulating their thermal response and temperature profiles, which have trends similar to the experimental curves that are found. Moreover, when high heat flux conditions are considered, the model simulates the materials' mass loss due to the ablation process: at the end of the simulation, the difference between the experimental and the modeled results is about 17% for CFRP and 35% for stainless steel. To reduce the model's uncertainties, the following analysis suggests the need to consider the influence of adequate material thermophysical properties and the physical-chemical processes that affect the samples' temperature profile and mass loss.
提出了一个初步的一维热数值模型,用于研究316L不锈钢、碳化硅(SiC)和碳纤维增强聚合物(CFRP)在非受控大气再入过程中的烧蚀行为。将测试案例建模结果与在欧洲航天局清洁空间倡议框架下获得的实验数据进行了比较:使用斯图加特大学空间系统研究所(IRS)的等离子风洞(PWT)设施,将材料样本暴露于不同的热流条件下。该数值模型通过模拟所选材料的热响应和温度分布来近似其加热历史,这些热响应和温度分布具有与所发现的实验曲线相似的趋势。此外,当考虑高热流条件时,该模型模拟了由于烧蚀过程导致的材料质量损失:在模拟结束时,CFRP的实验结果与建模结果之间的差异约为17%,不锈钢的差异约为35%。为了减少模型的不确定性,以下分析表明需要考虑适当的材料热物理性质以及影响样本温度分布和质量损失的物理化学过程的影响。