Method of compressing a fluid flow in a multi stage centrifugal impeller
AssigneeGeneral Electric Company
InventorsLawrence W. Blair, Alexander C. Bryans
Life of this patent
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Abstract
A multistage centrifugal impeller in which each blade row is individually matched to optimum efficiency characteristics in a manner which minimizes blade lean. Each blade row is composed of twisted blades which substantially equalize working fluid diffusion from blade root to blade tip while restraining blade lean to less than 15.degree..
Claims17
A method of compressing a fluid flow and transforming said fluid flow from an axial to a centrifugal flow in a centrifugal compressor, which comprises the steps of:
- (a) compressing the fluid in an optimized axial manner at a first blade row including blades each having a root and a tip, and
- (b) further compressing the fluid in an exit blade row with an optimized centrifugal exit, said exit blade row including blades each having a root and a tip,
- (c) the fluid flow being diffused at a substantially equalized rate along blade height from said roots to said tips of said blades of both said first and exit blade rows as the fluid proceeds from said first blade row and through said exit blade row.
A method of compressing a fluid flow in a unitary centrifugal compressor and transforming the fluid flow from an axial to a centrifugal flow, which comprises the steps of:
- (a) compressing the fluid in an optimized axial manner at an intake blade row including blades each having a root and a tip,
- (b) further compressing the fluid in a transitional to centrifugal manner at a central blade row including blades each having a root and a tip, and
- (c) further compressing the fluid in an optimized centrifugal blade row including blades each having a root and a tip, the fluid flow being diffused at a reduced rate as the fluid proceeds through the annular compression section by the means of variation of blade number in said blade rows,
- (d) the fluid flow being diffused at a substantially equalized rate along blade height from said roots to said tips of said blades of said intake, central and centrifugal blade rows as the fluid proceeds from said intake blade row and through said centrifugal blade row.
A method of compressing a gas in a centrifugal compressor comprising the steps of:
- (a) compressing said gas in a substantially axial direction through an inducer blade row including blades each having a root and a tip and blade twist angle profiles;
- (b) further compressing said axially compressed gas in a substantially radially outward direction through an exducer blade row including blades each having a root and a tip and blade twist angle profiles;
- and
- (c) matching said blade twist angle profiles of both said inducer and said exducer blade rows with different, substantially optimum gas stream lines at both said roots and said tips of said blades.
A method of compressing a gas in a centrifugal compressor comprising the steps of:
- (a) compressing said gas in a substantially axial direction through an inducer blade row including blades each having a root and a tip and blade twist angle profiles;
- (b) further compressing said axially compressed gas in a transitional blade row, including blades each having a root and a tip and blade twist angle profiles, and channeling said gas from a generally axial direction to a generally radially outward direction;
- (c) further compressing said compressed gas from said transitional blade row in a substantially radially outward direction through an exducer blade row including blades each having a root and a tip and blade twist angle profiles;
- (d) matching said blade twist angle profiles of said inducer, transitional and exducer blade rows with different, substantially optimum gas stream lines at both said roots and said tips of said blades;
- and
- (e) twisting said blades of said inducer, transitional, and exducer blade rows for obtaining blade lean.
Dependencies are inferred from the claim text.