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燃气发生器循环

燃气发生器循环示意图

燃气发生器循环,(Gas-generator cycle),是双组元推进剂发动机的动力循环的一种。一小部分推进剂在燃气发生器中燃烧,产生燃气推动发动机的涡轮泵。

燃气发生器循环大致相当于分级燃烧循环的简化版本,其优点是:燃气循环的涡轮不必应付向燃烧室排放废气时的反压力,因而涡轮机能的工作效率更高,提供给燃料的压力也更大,由此增加发动机的比冲。还有一个优点是燃气循环的涡轮机寿命更长更可靠。一些可重复使用发射系统使用这种动力循环有很大优势。

这种循环的主要劣势就在于效率的损失。由于燃料驱动涡轮产生的废气直接排出,未进入燃烧室做功,因此在净效率上,它反而不如同等级的分级燃烧循环。

发动机例子

参见

外部链接

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燃气发生器循环
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