Numerical simulation of nozzle flow for design of the devices using supersonic nozzle

In this study, as a preliminary step of supersonic nozzle performance prediction for designing the cleaning device with air nozzle, numerical analysis of two-dimensional nozzle flow was conducted. In this paper, CFD analysis of supersonic flow in two dimensions was performed as a preliminary stage. As a result of comparison between theoretical solution and numerical result, agreement between the numerical and the theoretical results can be observed, even though some slight discrepancy appeared. This discrepancy is caused by the fact that the theoretical solution is quasi-one-dimensional, whereas the numerical solution is two-dimensional. In the future, incorporation of subsonic boundary conditions into simulation code should be conducted for the extension of the robustness for the analysis code.