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Does engine purging in a liquid rocket engine cause dry run of the turbopump? If so, does that have any implication for the design, health, maintenance, or operation of the pump?

How do we calculate the purging pressure?

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  • $\begingroup$ You do not want to run your turbo pump without something in it. That can cause pump failure which is unlikely to be acceptable in a rocket application. And purging is often done with a pressurized gas, probably the same you use to pressurize your propellant tanks. Havn't got sources so no answer from me (: $\endgroup$ – GittingGud May 16 at 6:32

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