Application of Porous Jump Boundary Conditions in Numerical Simulation Study of Marine Gas Turbine Exhaust Ejector

摘要

In the study of marine exhaust ejector device, there exists a stubborn technical problem that the negative pressure of secondary flow inlet cannot be ascertained under different conditions. This paper features research combining porous jump boundary conditions with the resistance characteristic of the air intake filter. By using pressure-jump to replace the secondary flow inlet negative pressure conditions of an exhaust ejector, the workload of the numerical simulation can be reduced effectively. Experiments based on the similarity transformation have been done in this paper, and experimental data shows a close correlation with the numerical simulation results. The methods and conclusions can provide a reference for further research or similar problems.