FLAW DETECTION OF ENGINE COMPONENTS Russian patent published in 2014 - IPC G01M15/14 

FIELD: engines and pumps.

SUBSTANCE: water at pressure of P_in = 1.4…1.6 kgf/cm² is used as working fluid for gas turbine high-pressure turbine nozzle vanes. Water pressure difference upstream of analysed element is measured at definite section. Water flow rate through slit, bores in guide vanes and blades is defined to calculate current flow rates G_slit; G_{bore “C”}; and G_{g.v. bore}. Elements are evaluated by comparison of calculated current flow rates with preset optimum intervals of their magnitudes where G_slit is flow rate through slit of one blade; G_{bore “C”} is total flow rate through all bores of the unit; G_{g.v. bore} is mean arithmetic flow rate through one blade bore. Water flow rate through slit, unit bores and blade bore are defined with the help of direct and/or indirect measuring unit while new and/or used elements are used as analysed elements.

EFFECT: higher reliability and quality of repair, lower costs.

3 cl, 1 tbl