Fuel system centrifugal boost pump impeller

A centrifugal boost pump impeller comprising:

• an inducer section including a plurality of inducer main blades, and a plurality of inducer splitter blades, each of which includes normal to the blade mean line cross sectional surfaces distributed over the length of the blades, the cross sectional surfaces defined as a set of cylindrical coordinates, wherein a Z-axis aligns with a rotational axis of the blades, an R coordinate corresponds to the distance from the Z axis and a theta coordinate is the relative angular position, said coordinates relative to a value D2 which corresponds to an impeller outer diameter, set out in one set of tables, TABLE 1-1 for the main blades and TABLE 1-2 for the splitter blades, or TABLE 2-1 for the main blades and TABLE 2-2 for the splitter blades, or TABLE 3-1 for the main blades and TABLE 3-2 for the splitter blades;
• and
• an impeller section including a plurality of impeller main blades, a plurality of impeller primary splitter blades, and a plurality of impeller secondary splitter blades, each of which includes normal to the blade mean line cross sectional surfaces distributed over the length of the blades, the cross sectional surfaces defined as a set of cylindrical coordinates, wherein a Z-axis aligns with a rotational axis of the blades, an R coordinate corresponds to a distance from the Z axis and a theta coordinate is the relative angular position, said coordinates relative to the value D2 which corresponds to the impeller outer diameter, set out in one set of tables, TABLE 1-3 for the main blades, TABLE 1-4 for the primary splitter blades and TABLE 1-5 for the secondary splitter blades, or TABLE 2-3 for the main blades, TABLE 2-4 for the primary splitter blades and TABLE 2-5 for the secondary splitter blades, or TABLE 3-3 for the main blades, TABLE 3-4 for the primary splitter blades and TABLE 3-5 for the secondary splitter blades.

A method of assembling a centrifugal boost pump comprising:

• providing a shaft;
• and
• mounting an impeller on the shaft, the impeller including:
• an inducer section including a plurality of inducer main blades, and a plurality of inducer splitter blades, each of which includes normal to the blade mean line cross sectional surfaces distributed over the length of the blades, the cross sectional surfaces defined as a set of cylindrical coordinates, wherein a Z-axis aligns with a rotational axis of the blades, an R coordinate corresponds to the distance from the Z axis and a theta coordinate is the relative angular position, said coordinates relative to a value D2 which corresponds to an impeller outer diameter, set out in one set of tables, TABLE 1-1 for the main blades and TABLE 1-2 for the splitter blades, or TABLE 2-1 for the main blades and TABLE 2-2 for the splitter blades, or TABLE 3-1 for the main blades and TABLE 3-2 for the splitter blades;
• and
• an impeller section including a plurality of impeller main blades, a plurality of impeller primary splitter blades, and a plurality of impeller secondary splitter blades, each of which includes normal to the blade mean line cross sectional surfaces distributed over the length of the blades, the cross sectional surfaces defined as a set of cylindrical coordinates, wherein a Z-axis aligns with a rotational axis of the blades, an R coordinate corresponds to a distance from the Z axis and a theta coordinate is the relative angular position, said coordinates relative to the value D2 which corresponds to the impeller outer diameter, set out in one set of tables, TABLE 1-3 for the main blades, TABLE 1-4 for the primary splitter blades and TABLE 1-5 for the secondary splitter blades, or TABLE 2-3 for the main blades, TABLE 2-4 for the primary splitter blades and TABLE 2-5 for the secondary splitter blades, or TABLE 3-3 for the main blades, TABLE 3-4 for the primary splitter blades and TABLE 3-5 for the secondary splitter blades.