cracks-inside-cooled-turbine-bladesThe danger posed by cracks in cooled turbine bladesalso depends on the pressure difference between thegas flow and the cooling air inside the blade.If the total pressure of the hot gas inthe crack zone is greater than theinternal presser of the blade, there is a danger that hot gas could penetrateinto the blade and cause the cooledpart to fail.Hot gas flowCooling airGaping crack in the inlet blade edgeHot gas flowParallel cooling air system:Stator vane and turbine blade are suppliedseparately.Sequential cooling air system:Stator vane and turbine blade arecooled in sequence