抄録
Turbopumps have weak points, such as the pumping operation becomes unstable in the rising portion of the head characteristic and/or the cavitation occurs under the low suction head. To overcome simultaneously the both weak points, the authors have proposed the unique pumping system with counter-rotating mechanism. In this paper, the flow interactions in the counter-rotating impellers are discussed using the experimental results of the wall pressure. The flow at the front impeller inlet fluctuates in response to the front blade number and the flow fluctuation between the front and the rear impellers is affected mainly with the rear blade number.
