The thermal performance prediction and development of ablator for reentry probes using a smallsat.

进行了轻量化烧蚀器的研制和性能预测。加热开始时，由于气体平流产生的热通量对换热起着重要的作用。烧蚀器磁导率的变化对烧蚀器的热响应影响很大。对隼鸟号载轻量化烧蚀舱进行了热响应耦合的流场轨迹模拟。热解气体向后壁方向输能，使表观热传导增大。重型烧蚀器与轻型烧蚀器的滞止热流密度差异很小。轻量化烧蚀器的表面凹陷比重型烧蚀器大几倍。因此，本研究表明，轻量化烧蚀器不能使用相同的厚度，但可以通过稍微增加轻量化烧蚀器的厚度来防止热量的产生。

It was performed that the development and a performance prediction of lightweight ablator. The beginning of heating, heat flux due to the gas advection plays an important role for heat transfer. The variation of permeability of the ablator is very effective on the thermal response of the ablator.A trajectory-based flow field simulation around Hayabusa capsule loaded lightweight ablator coupled with thermal response was carried out. The pyrolysis gas flow transport energies to the direction of rear wall and it makes the apparent heat conduction higher. The difference of stagnation heat flux between heavy ablator and lightweight ablator is very small. The surface recession of lightweight ablator is few times larger than heavy ablator. Therefore, this study shows lightweight ablator cannot use same thickness but it suggests that it can prevent heat by slightly increasing the thickness of the lightweight ablator.