Patent ID: 8221067

Claim:
A rotodynamic machine for compressing a multiphase fluid comprising at least one gas phase and one liquid phase, said machine comprising at least one mobile wheel rotating around an axis, mounted in a housing, and at least one fixed wheel secured to the housing, said at least one mobile wheel comprising a hub fitted with at least two blades so as to form at least two channels delimited by the hub, the housing and two of said at least two blades, said at least two channels having a centrifugal part, characterized in that a length of one channel of the at least two channels defined as a ratio of a volume of said channel to a maximum orthoradial area of said channel ranges between 10 cm and 20 cm, an orthoradial area being measured between a leading edge and a trailing edge of the blades of the at least one mobile wheel in a plane perpendicular to the axis of rotation, and in that a ratio of an area of the largest orthoradial channel cross-section at a position in the channel to an area of the smallest orthoradial channel cross-section at another position in the channel is less than or equal to 3.