Research on the unsteady flow characteristics of high specific speed axial flow impellers with small aspect ratio and double blades.

ABSTRACT: High specific speed impeller with low aspect ratio is ideal for high-speed pump-jet propulsion. This study investigates its unsteady hydrodynamic characteristics using experimental and numerical methods. At the design flow rate (Q_d), the pressure amplitude at the blade's leading and trailing edges varies significantly along the streamline. Blade shape minimally affects flow velocity but significantly impacts leading-edge pressure fluctuations. For the mainstream, the highest fluctuation peak occurs at 0.9Q_d. The pressure amplitude gradually decreases from blade's shroud to hub. Along circumferential direction the minimum pressure amplitude is located in the middle of the two blades. In gap flow, the leading-edge pressure peaks at Q_d, with fluctuations prima

SUBMITTER: Lu Z 

PROVIDER: S-EPMC11893745 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature