Operational characteristics of the thermally choked ram accelerator
Operational characteristics of the thermally choked ram accelerator
复制标题
热阻冲压加速器的工作特性
DOI：
10.2514/3.23398
复制
发表时间：
1991
影响因子：
1.9
通讯作者：
D. Bogdanoff
中科院分区：
文献类型：
--
作者：
A. Bruckner;C. Knowlen;A. Hertzberg;D. Bogdanoff
本文从理论和实验两方面研究了管内冲压发动机加速弹丸超高速度的热堵塞冲压加速装置的工作特性。这种弹丸类似于传统冲压发动机的中心体，在高压下穿过装满预混合气体燃料和氧化剂的静止管道。燃烧过程伴随着弹丸行进，其热堵塞产生压力场，从而导致对弹丸的推力。本文给出了45~75Gm弹丸在长12.2m、口径38 mm的加速器上用甲烷基推进剂混合物在1150~2350m/S速度范围内的实验结果，研究了分级推进剂对弹丸的加速作用和不同混合物之间的过渡，并对几种推进剂混合物的速度极限进行了探讨。理论和实验之间的一致性很好。
Operational characteristics of the thermally choked ram accelerator, a ramjet-in-tube device for accelerating projectiles to ultrahigh velocities, are investigated theoretically and experimentally. The projectile resembles the centerbody of a conventional ramjet and travels through a stationary tube filled with premixed gaseous fuel and oxidizer at high pressure. The combustion process travels with the projectile, its thermal choking producing a pressure field which results in thrust on the projectile. The results of experiments with 45-75 gm projectiles in a 12.2 m long, 38 mm bore accelerator, using methane-based propellant mixtures, are presented in the velocity range of 1150-2350 m/s. Acceleration of projectiles with staged propellants and transitions between different mixtures are investigated and the velocity limits in several propellant mixtures are explored. Agreement between theory and experiment is found to be very good.