搜索 - 科创网

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内容：不过，显而易见的是，高空探空用的细火箭不能提高火箭的发动机质量占比，因为固机很难把长径比做很大，不如换成液机，燃料氧化剂储箱想怎么做怎么做，做成小玩具的形状都没问题，压燃料就用齿轮泵或者电泵。

内容：在液体火箭发展的几十年间，先后出现了七类比较重要的燃料运送方式(又叫循环方式):挤压循环、燃气发生器循环、分级燃烧循环、膨胀循环、膨胀排气循环、燃烧室抽气循环和电泵运输。 ,图7：燃烧室抽气循环示意图电泵循环（electric feed cycle）则是一种近乎全新的循环方式，取消了涡轮，用电动机来驱动燃料泵。,目前世界上采用电泵输送的运载火箭仅有新西兰的"电子"号运载火箭，其发动机名为"卢瑟福"发动机。,电泵循环的主要缺点在于，限于电动机和电池的性能，单台发动机的推力比较有限(Rutherford发动机的推力仅22kN)，工作时间也受到限制。 ,图8：电泵循环示意图花絮：笔者在wiki上找到combustion tap-off cycle 后，几番搜索才得以找到“燃烧室抽气循环”的翻译，差一点就要自作主张翻译成“燃烧抽头循环”了。。。

内容：一、项目初步设计记得虎哥在一片对电泵的讨论文章下有过评论：“涡轮泵太小以至于性能很难做起来是主要矛盾，关键是涡轮泵的设计和制造工艺”。,但是气压式的气体贮瓶小火箭更加不值得，电泵对于资金的要求过高，且电源的放置也同时成为了一个问题。

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