• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Multi-scale thermal response modeling of an AVCOAT-like thermal protection material
【24h】

Multi-scale thermal response modeling of an AVCOAT-like thermal protection material

机译：类似于AVCOAT的热防护材料的多尺度热响应建模

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A multi-scale modeling approach based on the stochastic Direct Simulation Monte Carlo (DSMC) and walker methods is developed to understand the complex flows and thermophysical phenomena through a syntactic foam TPS, similar to AVCOAT. Using novel, unstructured adaptive mesh refinement/Octree grids and newly developed subsonic boundary conditions, the counter-flow transport of boundary layer and pyrolysis gases through the porous microstructure is modeled for the first time. Permeability of the microstructure models having porosities of 0.71 and 0.86 is computed in the DSMC simulations and compared to a fibrous TPS material. The rigorous development of a stochastic based thermal response model that can couple convective, conductive, and radiative heat transfer through a porous material having non-uniform thermophysical properties and high temperature gradients is presented and compared with a one-dimensional finite-volume approach. The material thermal response is found to be dominated by conduction, yet, the interactions between boundary layer and pyrolysis species on the actual 3-D geometry, which cannot be considered in traditional material response solvers, may in fact cause them to underpredict the TPS material temperature. Published by Elsevier Ltd.
机译：开发了一种基于随机直接模拟蒙特卡洛（DSMC）和沃克方法的多尺度建模方法，以通过类似于AVCOAT的句法泡沫TPS了解复杂的流动和热物理现象。使用新颖的，非结构化的自适应网格细化/ Octree网格和新开发的亚音速边界条件，首次模拟了边界层和热解气体通过多孔微结构的逆流传输。在DSMC模拟中计算出孔隙率为0.71和0.86的微结构模型的渗透率，并将其与纤维状TPS材料进行比较。提出了基于随机的热响应模型的严格发展，该模型可以通过具有不均匀热物理特性和高温梯度的多孔材料耦合对流，传导和辐射传热，并将其与一维有限体积方法进行比较。发现材料的热响应受传导支配，但是，在实际3D几何体上边界层和热解物质之间的相互作用（在传统的材料响应求解器中无法考虑）实际上可能导致它们对TPS材料的预测不足温度。由Elsevier Ltd.发布

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号