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Expander cycle (rocket) - Wikipedia, the free encyclopedia |
 | | In an expander cycle, the fuel is heated before it is combusted, usually with waste heat from the main combustion chamber. |
 | | Because of the necessary phase change, the expander cycle is best used with cryogenic fuels such as hydrogen, methane, or propane, which can easily reach their boiling point. |
 | | In an open, or "bleed" expander cycle, only some of the fuel is heated to drive the turbines, which is then vented to atmosphere to increase turbine efficiency. |
| en.wikipedia.org /wiki/Expander_cycle (263 words) |
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