Patent ID: 8935925
Filing Date: 2015-01-20
Classification: F23R,Y10T

Abstract:
1. A method of smoothing out a stress distribution in a fuel nozzle sheath mounted about a fuel conveying member of a fuel nozzle, the fuel nozzle sheath comprising a tubular body having a perimeter and extending axially from an upstream end to a downstream end, and a lateral window defined through the tubular body and extending longitudinally along at least a portion of the perimeter at a location between said upstream and downstream ends, the method comprising: establishing a stress distribution along the window outline, and identifying a first inside corner of the lateral window which is subject to higher stresses, reducing a stress concentration at said first inside corner of said window by increasing a corner radius of said first corner relative to a radius of curvature of the other inside corners of the window as measured when projected in a same plane.