Development of Equilibrium Flow CFD Code Using CEA Database and Prediction on Ablation of SiC Coating Nozzle

Abstract

This study was conducted with the aim such as development of ablation model of SiC due to combustion gas inside nozzle, prediction on ablation of SiC coating nozzle, development of ablation analysis code. For this purpose, equilibrium flow analysis code using CEA database and a structural temperature distribution analysis code had been developed and the reliability of the code had been secured by carrying out the validation process. These codes were coupled by transferring the wall heat flux and wall temperature as boundary conditions to each other, and the flow/structure integrated analysis code was developed. In order to develop the ablation model, the active and passive oxidation characteristics of SiC materials was investigated. The shear erosion model was developed to simulate mechanical ablation and the melting model was developed to simulate thermochemical ablation. The amount of ablation over time was predicted and compared with the measured amount of erosion depth of nozzle test delivered from the Agency for Defense Development.