キャビテーション発生下の翼列の翼に作用する非定常流体力と非定常圧力分布の解析(第1報,流量変動,入口圧力変動を伴う流れ)(流体工学, 流体機械)

High-speed pumps, such as turbopumps for rocket engines, are usually operated with cavitation. The cavitation often becomes unsteady and generates the unsteady fluid forces on the blades. For the development of turbopumps with higher reliability, it is important to clarify the unsteady forces and pressure distributions on the blade. In the present study, the fluid forces and unsteady pressure distributions caused by flow rate fluctuation and inlet pressure fluctuation were calculated under the condition with cavitation. The effects of cavity length and the frequency of fluctuation on the unsteady forces and pressure distributions are discussed for lower and higher solidity cascades.