Calculation of Wake Field for Underwater Ignition of Solid Rocket Motors
In order to study the flow and development process and flow field structure of internal combustion bub-bles in the nozzle at the initial stage of underwater ignition of solid rocket motor,the gas-liquid two-phase flow field in the underwater ignition process of solid rocket motor was numerically simulated by CFD method and Fluent analysis software,and the transient evolution of gas Mach number,pressure and temperature in the wake flow field of solid rocket motor were obtained.The results show that there is a strong interaction between gas and water during the un-derwater ignition of the engine.The jet channel expands and contracts periodically along the axial direction;In one cycle,the phenomena of inflation,the liquid back pressure,backflow,necking and reswell of the liquid appear one after another;With the development of the flow field,the strength of expansion and contraction gradually weakened,and the necking position moves downstream;At the initial stage of the gas jet,the axial pressure reaches its highest point at the head of the gas bubble.The pressure peak appears at the nozzle outlet at the initial moment of ignition;The temperature oscillates within a certain range in the whole calculation domain,along the axial direction away from the outlet area,and there is intense heat transfer and obvious gas-liquid mixing.
Solid rocket engineSubmerged gas jetWake flow fieldGas bubbleNumerical simulation
NETL
NSTL
万方数据
