Diffuser for a radial compressor

A radial compressor comprising a diffuser, the diffuser comprising:

• a diffuser duct portion which is formed by a first side wall and a second side wall, wherein the first side wall and the second side wall are arranged so as to diverge at least partially from one another in a direction of flow;
• a blade ring having a number of blades, wherein the blades are arranged at least partially in the diffuser duct portion, wherein each of the blades has a pressure side and a suction side, and wherein the pressure side and the suction side of each blade are delimited by a blade leading edge and by a blade trailing edge of the respective blade;
• a number of pressure equalizing openings which are incorporated into at least one of the first and second side walls of the diffuser duct portion in a region where the first and second side walls diverge from one another, wherein each of the pressure equalizing openings is arranged between the pressure side of one blade and the suction side of an adjacent blade of the blade ring;
• and
• a first annular duct, which is arranged behind the pressure equalizing openings, wherein the first annular duct is fluidically connected to the diffuser duct portion via at least two of the pressure equalizing openings, such that a number of diffuser passages of the diffuser are fluidically connectable together, each diffuser passage being a region between two adjacent blades of the blade ring in the diffuser duct portion.

A turbocharger comprising a radial compressor, the radial compressor comprising a diffuser, the diffuser comprising:

• a diffuser duct portion which is formed by a first side wall and a second side wall, wherein the first side wall and the second side wall are arranged so as to diverge at least partially from one another in a direction of flow;
• a blade ring having a number of blades, wherein the blades are arranged at least partially in the diffuser duct portion, wherein each of the blades has a pressure side and a suction side, and wherein the pressure side and the suction side of each blade are delimited by a blade leading edge and by a blade trailing edge of the respective blade;
• a number of pressure equalizing openings which are incorporated into at least one of the first and second side walls of the diffuser duct portion in a region where the first and second side walls diverge from one another, wherein each of the pressure equalizing openings is arranged between the pressure side of one blade and the suction side of an adjacent blade of the blade ring;
• and
• a first annular duct, which is arranged behind the pressure equalizing openings, wherein the first annular duct is fluidically connected to the diffuser duct portion via at least two of the pressure equalizing openings, such that a number of diffuser passages of the diffuser are fluidically connectable together, each diffuser passage being a region between two adjacent blades of the blade ring in the diffuser duct portion.