Application of large eddy simulation on the performance study of wave blocker

摘要

The configuration and aerodynamics performance of the inlet system are important aspects in the process of installation with gas turbine on naval vessels. Under the requirements, large eddy simulation (LES) is used to simulate the three-dimension flow in wave blocker of marine inlet filter. The Smagorinsky-Lilly sub-grid model is used to model motions of small-scale structures. During numerical simulation, the SIMPLE algorithm method is applied. The central-differencing spatial discretization scheme and the second order accuracy finite difference for the temporal discretization are used. Simulation gives satisfactory distribution of the vorticity fields and turbulent kinetic energy. Compared with K−ε turbulent model, the results of LES are better for the distribution of parameters. The results of experimental study in small-scale wind tunnel indicate that numerical calculation has higher precision. Therefore, the methods used are worthy of reference and introduction for the design of the inlet system.