The charging process of marine steam accumulator involves complex mass and energy transfer process of vapor liquid two-phase.The charging characteristics of marine steam accumulator is crucial to the launch process of aircraft.The experiments of charging characteristics were carried out under different operating conditions with the help of a small steam accumulator experiment system.The results showed that the temperature of the water working medium appeared stratification phenomenon that the temperature of bottom water was lower and the temperature of top water was higher during the charging process.The pressure of steam accumulator decreased firstly and then turned to stable with the transient process that the state of the working medium became equilibrium from non-equilibrium after the charging process.The pressure drop ratio caused by unbalanced potential difference increased along with the decrease of the storage water quality and the increase of the charging energy per unit time.The charged steam flow

the initial pressure of charging and the water level had a significant influence on the charging characteristics of steam accumulator

so these parameters should be set reasonably in practical application according to the requirements of the launch.