Flow distribution of kerosene in actively cooling panel is an important factor that constraints the cooling efficiency of the thermal protection system of scramjet. However, the flow mal-distribution is a common phenomenon in the realistic thermal protection system. In order to investigate this problem, a way to regulate the pressure drop via restriction orifice is proposed. The flow, heat transfer and thermal cracking process in cooling tube are calculated using a three-dimensional fluid-solid conjugated simulation method for supercritical cracked-kerosene. The results indicate that with an appropriate restriction orifice, the pressure drop under a lower heat flux can match with that under correspondingly higher heat flux in a same tube, which verifies the feasibility of pressure drop regulating using the restriction orifice. Therefore, this research could provides a design method of flow distribution in actively cooling panel of scramjet.

主动冷却板中煤油的流量分布是制约超燃冲压发动机热保护系统冷却效率的重要因素。然而，流动分布不均是现实热保护系统中的普遍现象。为了研究这个问题，提出了一种通过节流孔调节压降的方法。采用超临界裂解煤油三维流固共轭模拟方法计算了冷却管内的流动、传热和热裂解过程。结果表明，采用合适的节流孔板，同一管内较低热通量下的压降可以与相应较高热通量下的压降相匹配，验证了采用节流孔板调节压降的可行性。所以，