Abstract: Aimed at the working principle of the blend-discharge integrated device (BDID) and its internal flow field characteristics, the transient flow field and pressure characteristics were simulated under a specific rotation speed, the performance curves of axial power and suction/discharge pressure were calculated under different rotational speeds with CFD method, and an experimental device was designed and prepared to verify the result of the calculation. The result showed that the simulation result would be consistent basically with test result. This simulation model and the performance prediction method would have a effect of guidance to certain extent for optimization design of BDID and would be able to provide certain investigation basis for the future serialization design and engineering application of this device.

Key words: blend-discharge integration, transient flow field, performance prediction, experimental verification