Numerical Simulation for Thermal Structure of Tail-pipe Nozzle under High Overload

Numerical simulation was made on flow field inside nozzle with Euler-Lagrange two-phase flow model. Different overload and particle's diameter were considered. On the basis of calculation,temperature field of 3D thermal structure of the whole nozzle was analyzed with consideration of three heat transfer styles and heat transfer characteristics of each region of the nozzle. The global temperature of the nozzle shows that temperature gradient of inner wall of the nozzle is significant,with particles added,the gas temperature at the rear part of the nozzle is much higher than that without particle,while the temperature gradient descent occurs in thermal protection layer,the particle diameter has a great impact on radiation heat transfer in the nozzle.