船舶燃气轮机进气系统中过滤装置数值模型化处理方法研究

In order to study the simulation accuracy and applicability of the numerical modeling method for filtration device in marine gas turbine intake system, for a marine gas turbine double-channel intake system, the Fan boundary condition and porous media model are used to model the complex structure of filtration device (shutter and filter), and the detailed numerical calculation of the flow field characteristics in the intake system is carried out. Research shows that most of total pressure loss of the intake system results from the total pressure loss in primary air filter and the flow loss in the shaft.Compared with Fan boundary condition, the porous media model can obtain more practical flow field inside the intake system and more reliable prediction of total pressure loss. The difference in the flow loss of the intake system calculated by the two methods does not exceed 10%. When using Fan boundary condition, it is necessary to ensure that the filtration device does not play an obvious role in rectifying, and the experimental data of pressure loss is complete, while porous media model can be selected under the given physical parameters of filtration device, such as resistance coefficient and porosity.