Effects of ~10atm pressure on engine design

Take a planet with an atmosphere similar to Earth's but, say, 9-10x as dense. What is this going to mean for the performance and design of the heat engines that are so familiar to us? Higher oxygen partial pressure... easier to burn? But higher air density means more heat conducted away... easier engine cooling, yes, but does it also hurt their performance? An internal combustion engine, instead of having something like 10:1 compression ratio, will only have about 2:1 (edit; assuming the engine is constructed to the same strength). Does this actually make a big difference, or does only the absolute difference in pressure matter? Likewise for a steam engine. Or (because I'm thinking particularly about aircraft here) a jet engine.

posted over 5 years ago

Tristan Klassen‭

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