In order to explore the effect of end-wall slot jet on the performance of compressor cascades in marine gas turbines,the SST κ-ω turbulence model with transition was adopted to numerically simulate the aerodynamic performance of compressor cascades.And the influence of the jet angle and combination method of the end-wall slot jet on the flow separa-tion of compressor cascades was explored.It can be found that the end-wall slot jet significantly inhibited the corner separa-tion and reduced flow loss,among which the combined jet has better flow control effect.When the jet flow rate is only 0.435％of the mainstream flow rate,30°combined jet can reduce the loss by 27.63％and increase the static pressure coefficient by 9.2％.The end-wall slot jet mainly reduces the flow loss and improves the performance of the cascade by suppressing the secondary flow in the endwall region,promoting the mixing of low-energy fluid with mainstream,and controlling the devel-opment of passage vortex,concentrated shed vortices,and induced vortices.
关键词
舰用燃气轮机叶栅/端壁狭缝射流/流动控制/角区分离
Key words
marine gas turbine cascade/end-wall slot jet/flow control/angular separation
维普
万方数据