Diffuser with boundary layer removal

Claim 2

A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket; the diffuser body defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; means defining a manifold extending circumferentially of the diffuser; and means within the body defining passages connecting the exit slots to the manifold.

Claim 3

A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, each tube diverging downstream and having a curved centerline directed to turn the flow into a more radial direction; the diffuser definIng a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; meens defining a manifold extending circumferentially of the diffuser; and means within the body defining passages connecting the exit slots to the manifold.

Claim 4

A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, each tube diverging downstream and having a curved centerline directed to turn the flow into a more radial direction; the diffuser definIng a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; meens defining a manifold extending circumferentially of the diffuser; and means within the body defining passages connecting the exit slots to the manifold.

Claim 5

A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, the diffuser defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; each outlet tube having a circumferential recess connected to the exit slot; and means defining a manifold extending circumferentially of the diffuser defined in part by a recess in the side face of the body; the body defining ports connecting the outlet tube recesses to the manifold.

Claim 6

A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, the diffuser defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; each outlet tube having a circumferential recess connected to the exit slot; and means defining a manifold extending circumferentially of the diffuser defined in part by a recess in the side face of the body; the body defining ports connecting the outlet tube recesses to the manifold.

Claim 7

A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, each tube diverging downstream and having a curved centerline directed to turn the flow into a more radial direction; the diffuser defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; each outlet tube having a circumferential recess connected to the exit slot; and means defining a manifold extending circumferentially of the diffuser defined in part by a recess in the side face of the body; the body defining ports connecting the outlet tube recesses to the manifold.

Claim 8

A diffuser for a centrifugal compressor comprising, in combination, a generally annular diffuser body defining diverging diffusing passages extending generally radially and tangentially from the radially inner surface of the body to the radially exterior surface of the body, the radially outer end of each passage being enlarged to provide a socket; a diffuser outlet tube mounted in each socket, each tube diverging downstream and having a curved centerline directed to turn the flow into a more radial direction; the diffuser defining a boundary layer exit slot between the radially inner end of each outlet tube and the bottom of the corresponding socket; each outlet tube having a circumferential recess connected to the exit slot; and means defining a manifold extending circumferentially of the diffuser defined in part by a recess in the side face of the body; the body defining ports connecting the outlet tube recesses to the manifold.