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Re: the jet propulsion with closed combustion type
I try to explain why the new type engine has more efficiency from another direction, compared with current jet engine, the new engine uses up the same amount mechanical work and chemical energy but gets higher-pressure gas, the gas can make more work if its pressure is higher. So the new type engine has more efficiency.
I can conclude that the new engine can get higher-pressure gas because the gas pressure can increase further by the closed combustion course besides by the compressor that also is used in current jet engine.
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