论文部分内容阅读
针对目前单边膨胀喷管(Single expansion ramp nozzle:SERN)设计方法的缺陷,提出了通过指定壁面压力分布规律来反设计喷管型线的方法,获得了膨胀面型线反设计程序。根据给定的最优壁面压力分布反设计了喷管型线,将该喷管与最大推力喷管进行了性能对比研究,并对该喷管进行缩比冷流试验,试验和数值模拟结果吻合很好。结果表明:在设计点,相比于最大推力喷管,该喷管的轴向推力系数比最大推力喷管只降低0.07%,而升力和俯仰力矩分别提升了23.08%和2.82%,验证了设计思想的正确性,为SERN的设计提供了一种高效而新的设计方法。
Aiming at the defects of the current design method of single expansion ramp nozzle (SERN), a method of inversely designing the nozzle line by specifying the wall pressure distribution is proposed. According to the given optimal wall pressure distribution, the nozzle profile is designed and the performance comparison between the nozzle and the maximum thrust nozzle is carried out. The nozzle is subjected to the shrinkage ratio cold flow test, and the experimental results agree well with the numerical results well. The results show that at design point, compared with the maximum thrust nozzle, the axial thrust coefficient of the nozzle is only 0.07% lower than the maximum thrust nozzle, while the lift and pitching moments are increased by 23.08% and 2.82% respectively, which verifies the design The correctness of the idea provides an efficient and new design method for SERN’s design.