The body-centered cubic lattice sandwich panels have superior mechanical performance, and current works only focus on their mechanical performance. The effective thermal conductivity and heat transfer characteristics have not been reported. The effective thermal conductivity and heat transfer characteristics for a series of body-centered cubic lattice sandwich panel were explored by theoretical analysis and numerical modeling. It is revealed that through the rational design of the geometry, the relative density is modulated to be within 5%, suggesting the excellent lightweight character is obtainable. The numerical simulation agrees well with the theoretical predictions, indicating the theoretical expressions can well predict the effective thermal conductivity with the consideration of the heat conduction and cavity radiation. The effective thermal conductivity is within 3.5 W/(m·^oC) which is much lower than that of the constituent, indicating the design of the lattice core sandwich panel reduces the effective thermal conductivity as well as gives the lightweight design. It is revealed that the sandwich panel PY always presents the low relative density and high insulation efficiency. The results obtained in this work provide a basic reference to the parameter selection of the body-centered cubic lattice core sandwich panels for the potential applications in hot structures.

以身体为中心的立方晶格夹心板具有卓越的机械性能，目前的工作仅集中在其机械性能上。有效的热导率和传热特性尚未报道。通过理论分析和数值模拟，探索了一系列体心立方晶格夹芯板的有效导热系数和传热特性。结果表明，通过合理的几何设计，相对密度被调制在5％以内，表明可获得优异的轻量化特性。数值模拟与理论预测吻合得很好，表明理论表达式在考虑热传导和腔辐射的情况下可以很好地预测有效导热系数。^o C）远远低于组成成分的温度，表明晶格芯夹芯板的设计降低了有效的热导率，并提供了轻巧的设计。揭示了夹层板PY总是呈现出低的相对密度和高的绝缘效率。这项工作中获得的结果为体心立方晶格芯夹芯板的参数选择提供了基本的参考，可用于高温结构。