Patent ID: 9581034
Date: 2017-02-28
CPC Classifications: F01D,F04D,F05D,Y02T

Claim:
1. A stationary vane arrangement for guiding a working fluid from an inlet end of a turbomachine to an outlet end, the stationary vane arrangement comprising: at least one row of a plurality of stationary vanes extending radially inwardly from a stationary casing in a circumferential spacing around a perimeter of the casing, each stationary vane having a leading edge opposite a trailing edge and opposing longitudinal surfaces extending between the leading edge and the trailing edge, wherein the trailing edges of a first portion of the stationary vanes have a first end profile and the trailing edges of a second portion of the stationary vanes have a second end profile different from the first end profile, wherein the stationary vanes are arranged such that each stationary vane having the first end profile is located between stationary vanes having the second end profile to minimize fundamental wake passing frequencies downstream of the trailing edges, wherein the first end profile comprises a substantially rounded edge and wherein the second end profile comprises a tapered chamfered end that is angled with respect to the opposing longitudinal surfaces of the stationary vane, and wherein a first subset of the second end profile comprises a tapered chamfered end that is angled in a first direction with respect to the opposing longitudinal surfaces of the vane and wherein a second subset of the second end profile comprises a tapered chamfered end that is angled in a second direction with respect to the opposing longitudinal surfaces such that the stationary vanes of the first subset and the stationary vanes of the second subset are positioned on opposing sides of stationary vanes having the first end profile.