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The principle in general is known as the thermal ramjet: pass the air through a specially-shaped duct and heat it on its way through. The Meredith effect applies specifically to intermediate circulatory systems which pump a special coolant fluid around in order to heat the air. Inline engines benefit from such systems because most cylinders cannot receive ...


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1) For any thermal engine, energy efficiency is directly correlated to temperature, while power density is indirectly correlated to temperature as well. Because radiator temperature isn't very high, a jet engine using radiator heat is very inefficient and bulky. 2) For a ICE engine, majority of waste heat is carried away by the exhaust so amount of energy ...


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Compared to a turbojet engine, the heating (from cylinder fins) of the working fluid (air) in an radial engine is relatively small, and so will be the possible thrust augmentation via the Meredith effect. Better results can be had by dumping the engine exhaust into the cooling air stream exiting the engine, and directing this blend of spent engine cooling ...


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