Numerical Simulation Of Isothermal Gas-Solid Two-Phase Flow Behavior In Solid Rocket Engine

The flow behavior of isothermal gas-solid in solid rocket engine chamber was simulated with Euler multiphase model and k-εgas turbulence model, as well as mixture mesh technology with FLUENT. In this present paper, the influence of different diameters and inlet velocities on the flow behavior of particles was studied. Simulated result indicated that the particle concentration increases on aft-end and nozzle with the increase of particle diameter, the particle concentration is higher near the aft-end and the bigger diameter particle are more easy to deposit on aft-end when the particle density is same. The smaller the particle diameter, the higher the turbulent kinetic energy, which was agreement with that the small diameter particle has high flow velocity. The particle concentration increased with the increase of inlet velocity because of the higher turbulent Kinetic Energy. The result also indicated that the velocity distribution in the nozzle was more uniform when the inlet velocity was higher. All of that can give some suggestion to the design of solid rocket chamber nozzle.Also the flow behavior of isothermal gas-solid in solid rocket engine chamber was simulated with user-defined-function of the moving description of combustion interfacial as well as non-structure meshes and re-meshing method. The combustion interfacial moved along racial and axial directions were simulated respectively. The simulation of the continue changes of combustion interfacial is more important to the inner working process of solid rocket. The dynamic mesh method can also be used to other working field changes, translation and rotation.