The end-wall shaping effects of the guide blade in the steam turbine stages are studied.The research of the end-wall shaping effects on turbine efficiency applies CFD numerical simulations and the measurement of strai...The end-wall shaping effects of the guide blade in the steam turbine stages are studied.The research of the end-wall shaping effects on turbine efficiency applies CFD numerical simulations and the measurement of straight blade cascades in the wind tunnel.The final stage of research activities includes the experimental verification of the findings in an experimental steam turbine.As the findings are interesting in terms of efficiency,a series of 3-D numerical simulations are executed.These demonstrate the certain improvement when the shaping is used,especially in the blade tip area.The steam turbine is used to measure the shaping effects on both sides（bilateral shaping）as well as only in the blade tip area.The process indicates the efficiency improvement on the blade tip shaping.However,this occurs only in partial admission.On the other hand,there is a drop in efficiency compared with blades with straight end-walls.展开更多
基金the Ministry of Industry and Trade of the Czech Republic for the financial support of Grant No.FT-TA2/037
文摘The end-wall shaping effects of the guide blade in the steam turbine stages are studied.The research of the end-wall shaping effects on turbine efficiency applies CFD numerical simulations and the measurement of straight blade cascades in the wind tunnel.The final stage of research activities includes the experimental verification of the findings in an experimental steam turbine.As the findings are interesting in terms of efficiency,a series of 3-D numerical simulations are executed.These demonstrate the certain improvement when the shaping is used,especially in the blade tip area.The steam turbine is used to measure the shaping effects on both sides（bilateral shaping）as well as only in the blade tip area.The process indicates the efficiency improvement on the blade tip shaping.However,this occurs only in partial admission.On the other hand,there is a drop in efficiency compared with blades with straight end-walls.
