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â ScienceWhich risk increases when continuously throttling a cryogenic rocket engine?
A)Combustion instability within the engineâ
B)Increased heat convection into propellant
C)Turbopump overspeed due to low load
D)Augmented nozzle erosion from backflow
đĄ Explanation
Combustion instability may result from throttling because the reduced mass flow rate decreases the damping of acoustic oscillations inside the combustion chamber impacting stable deflagration; therefore instability grows rather than reaching equilibrium at a different operating pressure.
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