Three dimension numerical simulation of heat transfer in regeneratively cooled nozzle

To understand heat transfer characteristics of regenerative cooling in liquid propellant rocket nozzle, numerical simulation was employed. Three dimensional governing equations for hot gas, solid wall and coolant were established respectively, and coupled calculation of flow and heat transfer was carried out. In calculation, it was assumed that nozzle flow was frozen, and convective and radiative heat transfer from gas to nozzle wall was considered. Governing equations were discretized with second order upstream scheme and radiative heat transfer equation was solved with Discrete Ordinates (DO) method. Absorption coefficient of water vapor was calculated from Leckner formula. Subscale calorimeter was chosen as the computational model. Results showed that numerical results agreed well with experimental data. The flow field and temperature field in nozzle were obtained.