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Which mechanism causes decreased compression ratio in pulsed detonation engines' cycle?

A)Fluid-dynamic chocking increases volume
B)Heat transfer drops chamber pressure
C)Fuel viscosity lowers energy density
D)Incomplete combustion decreases temperature

💡 Explanation

Decreased compression arises when heat readily transfer out of the combustion process because heat loss reduces gas pressure, inhibiting full cylinder filling, this effect is known as Isobaric cooling; therefore, compression decreases rather than fluid dynamic effects mattering.

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