公开(公告)号：JP2000170695A

公开(公告)日：2000-06-20

申请号：JP35119499

申请日：1999-12-10

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BARNETT MARK ,  GRAF MARTIN ,  RAW JOHN A ,  SHARMA OM ,  SPROUT WILLIAM D

IPC: F04D17/10 ,  F04D27/02 ,  F04D29/16 ,  F04D29/42 ,  F04D29/44 ,  F04D29/66

Abstract: PROBLEM TO BE SOLVED: To improve the stability of a compressor and to improve the efficiency thereof by forming a groove continuing in a circumferential direction and defined with an upper stream wall and a lower stream wall axially separated, at a specified angle, on an inner peripheral surface of a casing arranged so as to surround a blade line of the compressor. SOLUTION: A fan of a compressor radially provided with a blade 16 extending outward in a diametrical direction from a hub 12 rotating about a compressor rotating shaft 14, has a casing 36 having an inner cannel surface 38 of a diametrical direction. A groove 40 continuing in a circumferential direction and defined with a the casing 36 an upper stream wall 42 and a lower stream wall 44 which are axially separated is formed on the casing 36. An upper stream rip 48 and a lower stream rip 50 formed by the groove 40 are continued to the cannel surface 38. The upper stream wall 42 is preferably arranged to form an acute angle θA to the cannel surface 38, and the lower stream wall 44 is arranged to form an acute angle θO, thereby ensuring fluid mechanics stability of the compressor.

公开(公告)号：DE69924816D1

公开(公告)日：2005-05-25

申请号：DE69924816

申请日：1999-12-10

Applicant: UNITED TECHNOLOGIES CORP ,  PRATT & WHITNEY CANADA

Inventor： BARNETT MARK ,  GRAF MARTIN ,  SPROUT WILLIAM D ,  RAW JOHN A ,  SHARMA OM

IPC: F04D17/10 ,  F04D27/02 ,  F04D29/16 ,  F04D29/42 ,  F04D29/44 ,  F04D29/66

Abstract: An axial flow or centrifugal flow compressor includes a casing treatment for enhancing the compressor's fluid dynamic stability. The casing treatment comprises a circumferentially extending compartment (62), typically comprising a voluminous pressure compensation chamber (64) and a single passage (66) circumferentially coextensive with the chamber, for establishing fluid communication between the chamber and the flowpath. The compartment attenuates the inordinate circumferential pressure difference across the tips of excessively loaded compressor blades (16), making the compressor less susceptible to tip vortex induced instabilities.

公开(公告)号：DE69940487D1

公开(公告)日：2009-04-09

申请号：DE69940487

申请日：1999-12-10

Applicant: UNITED TECHNOLOGIES CORP ,  PRATT & WHITNEY CANADA

Inventor： BARNETT MARK ,  GRAF MARTIN ,  SPROUT WILLIAM D ,  RAW JOHN A ,  SHARMA OM

IPC: F04D17/10 ,  F04D27/02 ,  F04D29/16 ,  F04D29/42 ,  F04D29/44 ,  F04D29/66

Abstract: An axial flow or centrifugal flow compressor includes a casing treatment for enhancing the compressor's fluid dynamic stability. The casing treatment comprises a circumferentially extending compartment (62), typically comprising a voluminous pressure compensation chamber (64) and a single passage (66) circumferentially coextensive with the chamber, for establishing fluid communication between the chamber and the flowpath. The compartment attenuates the inordinate circumferential pressure difference across the tips of excessively loaded compressor blades (16), making the compressor less susceptible to tip vortex induced instabilities.

公开(公告)号：DE69924816T2

公开(公告)日：2006-01-26

申请号：DE69924816

申请日：1999-12-10

Applicant: UNITED TECHNOLOGIES CORP ,  PRATT & WHITNEY CANADA

Inventor： BARNETT MARK ,  GRAF MARTIN ,  SPROUT WILLIAM D ,  RAW JOHN A ,  SHARMA OM

IPC: F04D17/10 ,  F04D27/02 ,  F04D29/16 ,  F04D29/42 ,  F04D29/44 ,  F04D29/66

Abstract: An axial flow or centrifugal flow compressor includes a casing treatment for enhancing the compressor's fluid dynamic stability. The casing treatment comprises a circumferentially extending compartment (62), typically comprising a voluminous pressure compensation chamber (64) and a single passage (66) circumferentially coextensive with the chamber, for establishing fluid communication between the chamber and the flowpath. The compartment attenuates the inordinate circumferential pressure difference across the tips of excessively loaded compressor blades (16), making the compressor less susceptible to tip vortex induced instabilities.

公开(公告)号：DE69507509T2

公开(公告)日：1999-09-02

申请号：DE69507509

申请日：1995-10-23

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SHARMA OM ,  STAUBACH JOSEPH ,  STETSON GARY

IPC: F01D5/14 ,  F01D5/20

公开(公告)号：DE69507509D1

公开(公告)日：1999-03-04

申请号：DE69507509

申请日：1995-10-23

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SHARMA OM ,  STAUBACH JOSEPH ,  STETSON GARY

IPC: F01D5/14 ,  F01D5/20

公开(公告)号：DE69503122T2

公开(公告)日：1999-02-18

申请号：DE69503122

申请日：1995-04-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SHARMA OM

IPC: F01D1/04 ,  F01D5/14 ,  F01D9/04 ,  F01D25/06 ,  F02C7/00 ,  F02K3/06 ,  F02C1/00

Abstract: The first stage of vanes (16) and second stage of vanes (24) each contain the same number of vanes. The second stage vanes are located such that the wake flow (38) from the first stage vanes falls on or near the leading edge, after passing through the stage of rotating blades.

公开(公告)号：DE69503122D1

公开(公告)日：1998-07-30

申请号：DE69503122

申请日：1995-04-11

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SHARMA OM

IPC: F01D1/04 ,  F01D5/14 ,  F01D9/04 ,  F01D25/06 ,  F02C7/00 ,  F02K3/06 ,  F02C1/00

Abstract: The first stage of vanes (16) and second stage of vanes (24) each contain the same number of vanes. The second stage vanes are located such that the wake flow (38) from the first stage vanes falls on or near the leading edge, after passing through the stage of rotating blades.