The multidimensional geometric effects within the heat shield of the Stardust sample return capsule are studied over its reentry trajectory, using a material response solver. The solver models material charring, conductive heat transfer, surface energy balance, pyrolysis gas transport, and orthotropic material properties in three dimensions. The material response of the heat shield is computed using isotropic and orthotropic models for conductivity and permeability, and both results are compared to the 1-D model. The orthotropic and isotropic models predict dissimilar responses, especially in regard to the surface blowing rates and pyrolysis gas transport. Although both models yield similar results for the surface temperature near the stagnation region, the temperature distribution within the heat shield differs. The 1-D model appears to greatly underestimate the thermal response deeper in the material, especially late in the trajectory.

使用材料响应求解器研究了星尘样品返回胶囊隔热罩内的多维几何效应，并对其返回轨迹进行了研究。该求解器在三个方面对材料炭化，传导热传递，表面能平衡，热解气体传输和正交异性材料特性进行建模。使用各向同性和正交各向异性的电导率和渗透率模型来计算隔热板的材料响应，并将这两个结果与一维模型进行比较。正交各向异性和各向同性模型预测的响应不同，尤其是在表面吹塑速率和热解气体传输方面。尽管两个模型对于停滞区域附近的表面温度产生相似的结果，但隔热屏内的温度分布不同。