Influence of Cooling Structures at the Leading Edge on Flow and Heat Transfer Characteristics of a High Pressure Turbine Guide Vane
To obtain the influence of the cooling structure at the leading edge on flow and heat transfer characteristics of a high pressure turbine guide vane,a three-dimensional numerical simulation method was used to study the flow and heat transfer characteristics of high pressure turbine guide vane with differ-ent film hole diameters and cold air chamber partition structures at the leading edge.The research results indicate that an increase in the aperture of the leading edge gas film hole leads to an increase in the a-mount of cold air,but it is necessary to comprehensively consider the pressure loss along the cooling sup-ply chamber,otherwise it may lead to a decrease in the margin of the leading edge gas film countercurrent and difficulties in cold air outflow.The position and structure of the partition between the cold air cham-bers will have an impact on the pressure distribution along the cold air chamber.By partially opening the partition or opening holes in the partition,the pressure loss along the cold air chamber can be effectively reduced,and the countercurrent margin in the leading edge area can be improved.The impact holes and flow columns at the leading edge of the guide vanes can have an impact on the countercurrent margin and cold air mass rate of the gas film hole,and it should be comprehensively considered in design of the cool-ing structure in the leading edge area of high pressure turbine guide vanes.
cold air outflowcooling structurenumerical simulationflow and heat transfer
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