For achieving high-speed requirement of underwater vehicle

a conceptual engine

which utilizes the hydroreactive characteristic of several metals under supercavitation environment

has been put forward. Especially

in order to obtain specific impulse as great as possible

a dual water injection system is taken into account. Then thermodynamic cycle model

which lead the improvement of power plant and energy system

is introduced in detail

and thermal efficiency is also analyzed. Furthermore

for investigating the performance of this kind of engine system

detailed thermodynamic calculation and analysis are achieved. Especially

regarding hydroreactive metal fuel Mg/AP/HTPB as our target fuel-rich propellant

considering its obvious deficient oxygen property and the energy property of magnesium/water reaction

theoretical calculation method is established by integrating chemical non-equilibrium with chemical equilibrium. Accordingly

low limit of primary water/fuel ratio is determined. In addition

the qualitative and quantitative relationship of performance parameters

such as theoretical specific impulse

nozzle exit temperature

characteristic velocity

etc.

versus water/fuel ratio is investigated respectively.