A novel non-ablative thermal protection system with combined spike and opposing jet concept

摘要

In order to reduce the aerodynamic heating of the hypersonic vehicles, a combined non-ablative thermal protection system (CNA-TPS) is proposed in this paper, which consists of the blunt body, the spike, the front and rear jets. The heat reduction efficiency is studied by the CFD numerical method. The results show that the heat reduction efficiency of CNA-TPS is better than the other configurations, which verifies the advantage of the CNA-TPS. In addition, the effect of length of the spike, total pressure ratios and sizes of the front and rear jets are studied. The results show that the heat reduction efficiency of CNA-TPS increases with the increase of length of the spike, total pressure ratios and sizes of the front and rear jets. The improving rate of the heat reduction efficiency gradually decreases with the increase of length of the spike and total pressure ratios of the front and rear jets. The investigations in this paper show the feasibility and advantage of CNA-TPS in the future engineering applications.