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← ScienceWhich 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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