Evaluation and design methods for high-efficiency charring composite under complex coupling mechanisms in both material and boundary layer

Weijie Li, Jie Huang, Zhongwei Zhang*, Haiming Huang*, Jun Liang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

6 引用 (Scopus)

摘要

With the development of hypersonic vehicles, reentry vehicles are facing a more severe aerothermodynamic heating environment. It is necessary to design high-efficiency charring composite used as the heat shield in the thermal protection system (TPS) of reentry vehicles. By taking the material responses (volume-surface coupled ablation), exothermic gas-phase reactions of pyrolysis gases in the boundary layer and the flow behavior of chemical nonequilibrium inflow coupling ablative mechanism into consideration, a developed thermal/fluid/chemical/ablation coupling model with the key influencing factor on thermal protection performance of charring composites is built to evaluate the material responses and the chemical responses in boundary layer near its surface. Based on this model, the key factor (fiber volume fraction) influencing on the thermal protection performance is analyzed by using a coupling numerical calculation strategy. By designing the distribution of this parameter along the thickness of the material, a gradient design for charring composite is given. The numerical results indicate that the gradient charring composite can control the temperature distribution and the amount of surface ablation recession. This study will be a guidance for the design of charring composites for thermal protection application in reentry vehicles in a quantitative and efficient manner.

源语言英语
文章编号49615
期刊Journal of Applied Polymer Science
138
1
DOI
出版状态已出版 - 5 1月 2021

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Li, W., Huang, J., Zhang, Z., Huang, H., & Liang, J. (2021). Evaluation and design methods for high-efficiency charring composite under complex coupling mechanisms in both material and boundary layer. Journal of Applied Polymer Science, 138(1), 文章 49615. https://doi.org/10.1002/app.49615