论文部分内容阅读
本文叙述了9种含金属端羟基聚丁二烯复合固体推进剂,在发动机加速度场中工作时,引起燃速增加的实验研究。实验装置包括一台离心机,以及分别装在旋转臂两端的两台相同药柱的试验发动机。实验在2.5—16MPa的压力范围内和0—700g的加速度范围内进行。研究了加速度、燃烧压力、加速度矢量方向、稳态燃速、铝粉含量和粒度、固体总含量、氧化剂粒度等参数的影响。研究发现燃速的增加受到加速度水平、稳态燃速、加速度矢量和表面垂线间的夹角、氧化剂粒度等参数的强烈影响;铝粉含量和粒度的影响则没有规律性。对于所试验的各推进剂,研究确定了加速度所致燃速增加率与简化加速度参数间的线性关系。该关系与Crowe提出的关系相同,但是注意到有某些偏差,表明Crowe的模型需要修正。
This paper describes the experimental study of nine kinds of metal-containing hydroxyl-terminated polybutadiene composite solid propellants that cause an increase in burning rate when operating in the acceleration field of an engine. The experimental set-up consisted of a centrifuge and two test engines mounted on two identical columns at each end of the arm. Experiments were performed in the pressure range of 2.5-16 MPa and in the acceleration range of 0-700 g. The effects of acceleration, combustion pressure, acceleration vector direction, steady state combustion rate, aluminum content and particle size, total solids content and oxidant particle size were studied. It is found that the increase of burning rate is strongly influenced by the acceleration level, the steady-state combustion rate, the angle between acceleration vector and the perpendicular of the surface, and the particle size of oxidant. The influence of aluminum content and particle size is not regular. For each propellant tested, the linear relationship between the rate of increase of combustion rate due to acceleration and the simplified acceleration parameter was determined. The relationship is the same as Crowe’s, but notes some deviations indicating that Crowe’s model needs correction.