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Effect of Time Gap Between Two Pyrotechnic Thrusters

机译：两个烟火推进器之间的时间间隔的影响

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摘要

The time-gap effect in a thruster-mass system is numerically investigated. Although two thrusters consisting of the thruster-mass system are ignited simultaneously, there may be a time gap between the times at which the pressure in two parallel thrusters starts to build up. The effect is changed by the locking status and the magnitude of the time gap. When the time gap is relatively small, the pressure profile and the ballistic performance are slightly changed. Thus, the increased pressure does not yield a catastrophic failure, and the reduction of the velocity index is acceptable. As the gap is increased enough, the locking condition contributes to the characteristics of the system. When the locking device is released in sequence, the ballistic performance is increased as the time gap is increased. In this case, there is no loss in performance. It is noticeable that the increase of the pressure may not be bounded theoretically when the time gap is fully increased. Since the peak pressure is too high to protect the thruster structure, it could be one reason causing a structural failure. When all locking devices are simultaneously released, the pressure and the ballistic performance are bounded as the time gap is fully increased. Because the maximum pressure and the ballistic performance are bounded, these characteristics could be a useful aspect, in that the minimum performance is guaranteed and there is no failure.
机译：数值研究了推进器质量系统中的时空效应。尽管同时点燃了由推进器质量系统组成的两个推进器，但在两个平行推进器中的压力开始建立的时间之间可能会有时间间隔。锁定状态和时间间隔的大小会改变效果。当时间间隔相对较小时，压力曲线和弹道性能会略有变化。因此，增加的压力不会产生灾难性的故障，并且速度指数的降低是可以接受的。随着间隙增加得足够大，锁定条件有助于系统的特性。当锁定装置顺序释放时，随着时间间隔的增加，弹道性能也会提高。在这种情况下，不会降低性能。值得注意的是，当时间间隙完全增加时，压力的增加可能在理论上不受限制。由于峰值压力太高而无法保护推进器结构，这可能是导致结构故障的原因之一。当同时释放所有锁定装置时，随着时间间隙的增加，压力和弹道性能将受到限制。因为最大压力和弹道性能是有界的，所以这些特性可能是一个有用的方面，因为可以保证最低性能并且没有故障。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2011年第1期|p.221-224|共4页
  • 作者

    Kiun Kim; In-Soo Jeon; Sung-Woo Ahn;

  • 作者单位

    Agency for Defense Development, Daejeon 305-608, Republic of Korea;

    Agency for Defense Development, Daejeon 305-608, Republic of Korea;

    Agency for Defense Development, Daejeon 305-608, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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