FLOW PASSAGE FOR PRE-SCROLL OF STRESS-REDUCED COMPRESSOR

摘要

PROBLEM TO BE SOLVED: To increase the low cycle fatigue life by reducing the rim stress. SOLUTION: A rotor assembly for gas turbine engine includes a rotor 12 having a rim 18 provided outside in the radial direction and provided with an outside surface 204 formed into a shape for reducing the concentration of the rim stress in the circumferential direction between each blade 24 and rims. Shape of the outside surface leads the air flow so as to be separated from a junction boundary of the blade and the rims. In this case, the outside surface of the rim has a recessed surface shape 210 between the adjacent blade, and a vertex is positioned in the junction boundary of the blade 24 and the rim 18.