Time-Resolved Fuel-Grain Port Diameter Measurement in Hybrid Rockets
Time-Resolved Fuel-Grain Port Diameter Measurement in Hybrid Rockets
复制标题
混合火箭中时间分辨燃料-谷物端口直径测量
DOI：
10.2514/1.2188
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发表时间：
2004
影响因子：
1.9
通讯作者：
Arif M. Karabeyoglu
中科院分区：
文献类型：
--
作者：
S. D. Zilwa;G. Zilliac;M. Reinath;Arif M. Karabeyoglu
提出了一种用于确定混合动力火箭发动机中固体燃料药柱瞬时空间平均端口直径的新技术。该技术需要测量发动机的亥姆霍兹振荡频率，并且基于该频率与燃烧室容积的平方根成反比的原理。这项技术应用于一台使用气态氧燃烧石蜡的混合动力火箭发动机。计算出的端口直径变化与根据运行过程中的质量损失确定的平均退移速率的相关性吻合良好。一个主要优点是，实施该技术所需的唯一仪器是一个高速压力传感器或一个光电倍增管。
A novel technique is presented for determining the instantaneous spatially averaged port diameter of solid-fuel grains in hybrid rocket motors. This technique requires measurement of the frequency of the Helmholtz oscillation of the motor and is based on the principle that this frequency is inversely proportional to the square root of the chamber volume. This technique was applied to a hybrid rocket motor burning paraffin wax with gaseous oxygen. The calculated variation of port diameter agreed well with the correlation for average regression rate, determined from mass loss during operation. A major advantage is that the only instrumentation required for implementing this technique is a high-speed pressure transducer or a photomultiplier tube.