Multiphase fluid pumping or compression device with blades of tandem design

A device for providing one of compressing and pumping of a multiphase fluid including at least one liquid phase and at least one gaseous phase, said device comprising:

• at least one hollow casing having at least one inlet port and at least one outlet port for the fluid;
• at least one rotor rotatably mounted inside the casing and having an axis of rotation O-X, a hub and at least one vane G.sub.j secured to the hub;
• at least one impeller having at least two vanes G.sub.j, each vane having a first blade A.sub.1j and a second blade A.sub.2j, wherein geometric characteristics and positioning of at least one of the first blades A.sub.1j and at least one of the second blades A.sub.2j in relation to each other are determined according to at least one parameter selected from the parameters 1-4 as follows:
• parameter 1:
• the ratio h/t of a tangential offset h in relation to a pitch t, wherein t is the pitch corresponding to a distance between two trailing edges f.sub.21 and f.sub.22 corresponding to each second blade A.sub.21 and A.sub.22 of at least one vane, is in the range between 0.95 to 1.05,
• parameter 2:
• a ratio of axial lap r.sub.j and of a total chord C.sub.Tj corresponding to at least one vane is in the range between 0.01 to 0.15,
• parameter 3:
• a chord ratio (C.sub.Fj /C.sub.Rj) defined, for at least one vane, by a ratio of a value of a chord C.sub.Fj of the first blade to a value of a chord C.sub.Rj of a second blade of at least one vanes is in the range between 0.5 to 1.5, and
• parameter 4:
• a camber ratio defined by a value of a camber of the first blade to a value of a camber of the second blade of at least one vane is in the range between 0.10 to 1.0;
• and wherein:
• the at least one vane G.sub.j comprises a first blade A.sub.1j and a second blade A.sub.2j separated from each other and attached to the hub such that the blades are contacted by the at least one liquid phase and the at least one gaseous phase along a length of the blades parallel to the hub;
• each blade has a leading edge a.sub.ij and a trailing edge f.sub.ij, and an angle formed by a tangent to a curve of a skeleton of the blades with a plane normal to an axis of rotation of the rotor is defined from the leading edge a.sub.ij of at least one of the first and second blades A.sub.1j and A.sub.2j and is in the range between 0.degree. and 45.degree.;
• and
• at least one opening extends between opposed faces of at least one of the first blade A.sub.1j and the second blade A.sub.2j to allow passage of the multiphase fluid through the at least one opening.

A device for providing one of compressing and pumping of a multiphase fluid including at least one liquid phase and at least one gaseous phase said device comprising:

• at least one hollow casing having at least one inlet port and at least one outlet port for the fluid;
• at least one rotor rotatably mounted inside the casing and having an axis of rotation O-X, a hub and at least one vane G.sub.j secured to the hub;
• at least one diffuser, with each diffuser having a first blade A.sub.ij and a second blade A.sub.2j, wherein geometric characteristics and positioning of at least one of the first blades A.sub.1j and at least one of the second blades A.sub.2j in relation to each other are determined according to at least one parameter selected from the parameters 1-4 as follows:
• parameter 1:
• the ratio h/t of a tangential offset h in relation to a pitch t, wherein t is the pitch corresponding to a distance between two trailing edges f.sub.21 and f.sub.22 corresponding to each second blade A.sub.21 and A.sub.22 of at least one vane, is in the range between 0.95 to 1.05,
• parameter 2:
• a ratio of axial lap r.sub.j and of a total chord C.sub.Tj corresponding to at least one vane is in the range between 0.01 to 0.15,
• parameter 3:
• a chord ratio (C.sub.Fj /C.sub.Rj) defined, for at least one vane, by a ratio of a value of a chord C.sub.Fj of the first blade to a value of a chord C.sub.Rj of a second blade of at least one vane is in the range between 0.5 to 1.5, and
• parameter 4:
• a camber ratio defined by a value of a camber of the first blade to a value of a camber of the second blade of at least one vane is in the range between 0.10 to 1.0;
• and wherein:
• the at least one vane G.sub.j comprises a first blade A.sub.1j and a second blade A.sub.2j separated from each other and attached to the hub such that the blades are contacted by the at least one liquid phase and the at least one gaseous phase along a length of the blades parallel to the hub;
• each blade has a leading edge a.sub.ij and a trailing edge f.sub.ij, and an angle formed by a tangent to a curve of a skeleton of the blades with a plane normal to an axis of rotation of the rotor is defined from the leading edge a.sub.ij of at least one of the first and second blades A.sub.1j and A.sub.2j and is in the range between 0.degree. and 45.degree.;
• and
• at least one opening extends between opposed faces of at least one of the first blade A.sub.1j and the second blade A.sub.2j to allow passage of the multiphase fluid through the at least one opening.