If power of turbines equals PT, power consumed by pumps is PP and the power consumed by auxiliaries is PA, what is the expression for auxiliary power?

Liquid Propellant Rocket Engine topics include: Liquid propellants, gas pressure feed systems, propellant tanks, tank pressurization, turbopump feed systems and engine cycles, flow and pressure balance, rocket engines for manueuvering, orbit adjustments or attitude control, liquid propellant rocket engine feed systems and engine support structure. A liquid propellant rocket engine (LRE) is a rocket propulsion system that uses liquid propellants to burn. LREs are used in space vehicles and expandable and reusable launchers worldwide.  LREs use a bipropellant configuration, where the fuel and... Show more

Liquid Propellant Rocket Engine topics include: Liquid propellants, gas pressure feed systems, propellant tanks, tank pressurization, turbopump feed systems and engine cycles, flow and pressure balance, rocket engines for manueuvering, orbit adjustments or attitude control, liquid propellant rocket engine feed systems and engine support structure.

A liquid propellant rocket engine (LRE) is a rocket propulsion system that uses liquid propellants to burn. LREs are used in space vehicles and expandable and reusable launchers worldwide. 

LREs use a bipropellant configuration, where the fuel and oxidizer are stored in separate tanks. The propellants can be forced into the combustion chamber with high pressure gases or drawn from the tanks using pumps. The pumps increase the pressure above the engine's operating pressure. 

Liquid propellants are desirable because they have a reasonably high density and their combustion products have high specific impulse (Isp). 

The most popular liquid-fuel rockets are liquid oxygen, kerosene, or liquid hydrogen. These combinations are effective both in space and closer to the ground. 

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