Analytical modeling of the steady state ablation of a 3D C/C composite
Analytical modeling of the steady state ablation of a 3D C/C composite
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DOI：
10.1016/j.ijheatmasstransfer.2008.01.008
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发表时间：
2008-05-01
影响因子：
5.2
通讯作者：
Vignoles, Gerard L.
中科院分区：
文献类型：
--
作者：
Lachaud, Jean;Aspa, Yvan;Vignoles, Gerard L.
在分析了3D C/C复合材料烧蚀过程中的表面粗糙度特征，即氧化和/或升华引起的壁面退缩之后，建立了一种建模策略，以便根据其组分的行为来预测复合材料的行为。它依赖于两个尺度的变化：(I)微观尺度(纤维、基质)到介观尺度(束)和(Ii)介观尺度(束、基质)到宏观尺度(复合材料)。物理基础是气化过程中与传质耦合的表面后退的一般模型。在每个尺度下，考虑垂直于整个表面的一维传质，在稳态下解析求解3D表面方程。通过与实验数据的比较，验证了模型的正确性。(C)2008爱思唯尔有限公司。保留所有权利。
Following an analysis of surface roughness features that develop on a 3D C/C composite during ablation, i.e. wall recession by oxidation and/or sublimation, a modeling strategy is set up in order to predict the composite behavior from that of its components. it relies on two changes of scale: (i) microscopic scale (fiber, matrix) to mesoscopic scale (bundle) and (ii) mesoscopic scale (bundle, matrix) to macroscopic scale (composite). The physical basis is a general model for receding surfaces under a gasification process coupled to mass transfer. At each scale, the 3D surface equation is analytically solved in steady state considering a 1-D mass transfer perpendicular to the overall surface. The models are validated by comparison to experimental data. (c) 2008 Elsevier Ltd. All rights reserved.