Turbomachinery stationary vane arrangement for disk and blade excitation reduction and phase cancellation
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F01D-009/04
F01D-005/14
F01D-005/16
F04D-029/044
F04D-029/68
F04D-029/42
F04D-029/44
F04D-029/54
출원번호
US-0804179
(2013-03-14)
등록번호
US-9581034
(2017-02-28)
발명자
/ 주소
Kushner, Francis
Pettinato, Brian Christopher
출원인 / 주소
Elliott Company
대리인 / 주소
The Webb Law Firm
인용정보
피인용 횟수 :
0인용 특허 :
11
초록▼
A turbomachine includes a plurality of rotating blades adjacent to a plurality of stationary vanes attached to a stationary casing. Stationary vanes are spaced apart circumferentially with equal spacing around an inner perimeter of the casing. Optionally, stationary vanes are offset radially and/or
A turbomachine includes a plurality of rotating blades adjacent to a plurality of stationary vanes attached to a stationary casing. Stationary vanes are spaced apart circumferentially with equal spacing around an inner perimeter of the casing. Optionally, stationary vanes are offset radially and/or circumferentially. Stationary vanes may alternate with leading and/or trailing edges at different distances from the rotating blades. In one embodiment, stationary vanes have tapered leading and/or trailing edge angles to homogenize flow and reduce stator wake excitation, flow excitation, and acoustic excitation due to interaction with spinning modes of acoustic pressure pulsations at rotating blade passing frequency. Tapered trailing edges are arranged such that they are inclined at mutually opposing angles to reduce rotor blade and/or disk excitation by: a) homogenizing the successive wakes within the flow stream, and b) reducing the effect of vortices shed-off the stationary vanes on acoustic modes of the gas within the casing.
대표청구항▼
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
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. 2. The stationary vane arrangement according to claim 1, wherein the plurality of stationary vanes is provided at the inlet end of the turbomachine and is configured for directing the working fluid to a row of rotating blades downstream from the plurality of stationary vanes. 3. The stationary vane arrangement according to claim 2, wherein the plurality of stationary vanes is spaced apart circumferentially around a perimeter of the casing at an unequal distance from each other about a longitudinal axis extending through the casing. 4. The stationary vane arrangement according to claim 1, wherein the plurality of stationary vanes is spaced apart circumferentially around the perimeter of the casing at an equal distance from each other about a longitudinal axis extending through the casing. 5. The stationary vane arrangement according to claim 1, wherein the first portion of the plurality of stationary vanes is offset with respect to a longitudinal axis extending through the casing relative to the second portion of the plurality of stationary vanes. 6. The stationary vane arrangement according to claim 1, wherein the plurality of stationary vanes has a linear profile. 7. The stationary vane arrangement according to claim 1, wherein the plurality of stationary vanes has a streamlined profile. 8. The stationary vane arrangement according to claim 1, further comprising a rotor having a plurality of rotating blades provided downstream from the plurality of stationary vanes, wherein the plurality of stationary vanes is configured for directing a working fluid to the plurality of rotating blades. 9. The stationary vane arrangement according to claim 8, further comprising a diffuser having a plurality of diffuser vanes provided downstream of the plurality of rotating blades and extending radially inwardly from the casing in a circumferential spacing around the perimeter of the casing, each diffuser vane having a leading edge opposite a trailing edge and opposing longitudinal surfaces extending between the leading edge and the trailing edge, wherein the leading edges of a first portion of the diffuser vanes have a first end profile and the leading edges of a second portion of the diffuser vanes have a second end profile different from the first end profile, and wherein the diffuser vanes are arranged such that diffuser vanes having a first end profile are provided adjacent to diffuser vanes having a second end profile. 10. The stationary vane arrangement according to claim 9, wherein the plurality of diffuser vanes is spaced apart circumferentially around a perimeter of the casing at an unequal distance from each other about a longitudinal axis extending through the casing. 11. A turbomachine, comprising: a casing having an inlet end opposite an outlet end along a longitudinal axis of the casing; a shaft assembly provided within the casing, the shaft assembly extending between the inlet and outlet ends; a rotor having a plurality of rotating blades extending radially outward from the shaft assembly; and a stationary vane arrangement provided upstream of the rotor, wherein the stationary vane arrangement comprises: at least one row of a plurality of stationary vanes extending radially inwardly from the 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 stationary vanes having the first end profile are provided adjacent to stationary vanes having the second end profile, 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. 12. The turbomachine according to claim 11, wherein the plurality of stationary vanes is provided at an inlet end of the turbomachine and is configured for directing a working fluid to a row of rotating blades downstream from the plurality of stationary vanes. 13. The turbomachine according to claim 11, wherein the plurality of stationary vanes is oriented in a same angular position with respect to the longitudinal axis extending through the casing. 14. The turbomachine according to claim 11, wherein the plurality of stationary vanes has a linear profile. 15. The turbomachine according to claim 11, wherein the plurality of stationary vanes has a streamlined profile. 16. The turbomachine according to claim 11, further comprising a diffuser having a plurality of diffuser vanes provided downstream of the plurality of rotating blades and extending radially inwardly from the casing in a circumferential spacing around the perimeter of the casing, each diffuser vane having a leading edge opposite a trailing edge and opposing longitudinal surfaces extending between the leading edge and the trailing edge, wherein the leading edges of a first portion of the diffuser vanes have a first end profile and the leading edges of a second portion of the diffuser vanes have a second end profile different from the first end profile, and wherein the diffuser vanes are arranged such that diffuser vanes having a first end profile are provided adjacent to diffuser vanes having a second end profile. 17. The turbomachine according to claim 16, wherein the plurality of diffuser vanes is spaced apart circumferentially around a perimeter of the casing at an equal distance from each other about a longitudinal axis extending through the casing. 18. A turbomachine, comprising: a casing having an inlet end opposite an outlet end along a longitudinal axis of the casing; a shaft assembly provided within the casing, the shaft assembly extending between the inlet and outlet ends; at least one rotor having a plurality of rotating blades extending radially outward from the shaft assembly; at least one stationary vane arrangement corresponding to the at least one rotor, the at least one stationary vane arrangement further comprising: at least one row of a plurality of stationary vanes provided upstream of the at least one rotor and extending radially inwardly from the 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 stationary vanes having the first end profile are provided adjacent to stationary vanes having the second end profile, 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; and at least one diffuser having a row of a plurality of diffuser vanes provided downstream of the rotor and extending radially inwardly from the casing in a circumferential spacing around the perimeter of the casing, each diffuser vane having a leading edge opposite a trailing edge and opposing longitudinal surfaces extending between the leading edge and the trailing edge, wherein the leading edges of a first portion of the diffuser vanes have a first end profile and the leading edges of a second portion of the diffuser vanes have a second end profile different from the first end profile, and wherein the diffuser vanes are arranged such that diffuser vanes having the first end profile are provided adjacent to diffuser vanes having the second end profile.
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이 특허에 인용된 특허 (11)
Andreas von Flotow ; George Zipfel, Blade vibration control in turbo-machinery.
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