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1. A radial compressor (1) comprising at least one impeller wheel (3), which is driven rotatably in a compressor housing (2) and has a wheel front side (5) and a wheel rear side (6), wherein the wheel front side (5) is configured to convey a mass flow (13, 23) by a number of blades (7), wherein the wheel rear side (6) of the at least one impeller wheel (3) has a blading (8) by which a second pressure distribution (12) is generated on the wheel rear side (6) of the at least one impeller wheel (3) during operation of the radial compressor (1), which second pressure distribution counteracts a first pressure distribution (11) on the wheel front side (5) in order to reduce an axial force that is to be braced in the compressor housing (2), wherein the compressor housing (2) is combined with the blading (8) on the wheel rear side (6) of the at least one impeller wheel (3) such that, during operation of the radial compressor (1), a cooling air mass flow (14, 24) is conveyed by the blading (8) on the wheel rear side (6) of the at least one impeller wheel (3) in addition to the mass flow conveyed by the blades (7) on the wheel front side (5), wherein the radial compressor (1) comprises a separating apparatus (27) completely separating a fluid space containing the mass flow (23) on the wheel front side (5) from a fluid space containing the cooling air mass flow (24) on the wheel rear side (6) of the at least one impeller wheel (3), wherein the mass flow (23) and the cooling air mass flow (24) independently exit radially outward from the compressor housing (2).
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