COMBUSTION CHARACTERISTICS OF FIBROUS FUELS FOR DRY TOWEL HYBRID ROCKET MOTOR
COMBUSTION CHARACTERISTICS OF FIBROUS FUELS FOR DRY TOWEL HYBRID ROCKET MOTOR
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干毛巾混合火箭发动机纤维燃料燃烧特性
DOI：
10.11230/jsts.13.1_11
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
I. Kudo
中科院分区：
文献类型：
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作者：
H. Nagata;K. Okada;Takashi Sanda;Takahiro Kato;R. Akiba;S. Satori;I. Kudo
针对传统固液火箭发动机燃烧效率低、推力水平低的缺点，提出了一种新的设计思路。这个想法的要点是，发动机使用干毛巾推进剂，其中氧化剂气体流动的差距空间的燃料床组成的塑料纤维，管，或杆。通过燃烧实验，阐明了干毛巾推进剂燃烧的基本机理。作为推进剂的基本样品，作者采用了两种类型的圆柱形纤维过滤器作为燃料，气体氧气在其中流动。环境压力从大气压变化到大于10 kgf/cm 2 G。结果表明，氧气流量对燃烧速率的影响很小。在5 ~ 6 kgf/cm 2G压力范围内，对一种燃料样品的燃烧速率有明显的跃变，表明在此压力范围内燃烧机理发生了变化。对于其他类型的燃料样品，没有观察到这种跳跃。到目前为止，这种跳跃现象的原因和控制因素尚不清楚。要实现这一设想，就必须弄清这种跳跃现象的基本机制。
To overcome defects of conventional hybrid rocket motors such as low combustion efficiency and low thrust level, the authors propose a new idea of design. The point of this idea is that the motor uses dry towel propellant, in which oxidizer gas flows the gap space in the fuel bed consisting of plastic fibers, tubes, or rods. Combustion experiments were carried out to clarify the basic mechanism of dry towel propellant combustion. As a basic sample of the propellant, the authors employed two types of cylindrical fibrous filters as a fuel in which gas oxygen is flowing. Ambient pressure was varied from atmospheric to more than 10 kgf/cm 2 G. As the results, the oxygen gas flow rate was found to have little influence on the burning rate. With one type of fuel samples, jump-up of the burning rate was observed in the pressure range of 5 to 6 kgf/cm 2 G, indicating the change of the combustion mechanism in this pressure range. With the other type of fuel samples, this jump-up was not observed. Up to now, the reason and controlling factor of this jump-up phenomenon are not clear. It is indispensable to clarify the basic mechanism of this jump-up phenomenon to realize the proposed idea.