Observation of the Cavitation in Rocket Turbopump Inducer. First Report Effect of Casing Geometry.

摘要

Some observations of rotating cavitation in a rocket turbopump inducer were made with three types of casing: a modified, an original and a straight casing. Rotating cavitation was observed with the original casing at the design flow rate, but was not observed with the modified or the straight one. The region of occurrence of rotating cavitation with the modified or the straight casing seemed to be shifted to a higher flow rate range, which might be caused by the backflow at the inducer inlet. It is also reported that the low cycle oscillation that occurred after attached cavitation is related to rotating cavitation and attached cavitation.