Inducer, and inducer-equipped pump

摘要

The present invention is concerned with an axial-flow or mixed-flow inducer (3) which is disposed upstream of a main impeller (2) for improving the suction capability of a pump such as a turbopump. In the inducer (3), a blade angle (β_bt) from a tip (T₁) to a hub (H₁) at a blade leading edge (31) is substantially the same as an inlet flow angle (β_1−t) at a designed flow rate.