... and driven rotation, thereby achieving energy recovery efficiency without investing in the driving device. The unsteady internal flow characteristics of the AFP under the unpowered driven condition differ from those of conventional conditions. The blade tip clearance (TC) is an essential basis...

...Yang Yang; Ling Zhou; Ling Bai; Hong Xu; Wanning Lv; Weidong Shi; Hongliang Wang Sewage pumps are one of the most popular types of fluid machinery in municipal, industrial, and environmental engineering and many other fields. The influence of tip clearance size on the pump performance and internal...

... at different tip clearance of 0.38 τ , 0.77 τ , 1.15 τ , and 1.54 τ and blade tip surface roughness of 0.31 ε and 0.62 ε . The tip clearance of 0.38 τ with blade tip surface roughness of 0.62 ε resulted in the highest stall margin and pressure rise of 20.3% and 4.3%, respectively. The compressor blade loading...

...Yongshun Zeng; Zhifeng Yao; Shijie Zhang; Fujun Wang; Ruofu Xiao Tip clearance in hydraulic machines may complicate the fluid–structure interaction (FSI) effects. In this investigation, a mode-based approach (modal work) is evaluated and employed to quantitatively predict the added mass, added...

...Enver S. Karakas; Hiroyoshi Watanabe; Matteo Aureli; Cahit A. Evrensel In this paper, the effect of the inducer tip clearance is studied to understand its impact on the cavitating and noncavitating performance of centrifugal pumps. Helical inducers with constant pitch and with variable (progressive...

... online March 4, 2019. Assoc. Editor: Ning Zhang. 02 08 2018 05 01 2019 rotordynamics vibration impeller unshrouded specific speed tip clearance rotating stall Energy efficient turbomachinery technology strives to develop more power-dense operating machines. High...

... by the uneven cavity length generates the fluid force acting on the inducer. Second, this fluid force results in rotor displacement and whirl motion in the rotordynamic system. This whirl motion creates a nonuniform tip clearance, which results in the acceleration of cavity unevenness of the tip leakage...

...Yong Sang Yoon; Seung Jin Song; Hyoun-Woo Shin Experiments have been performed on the low speed research compressor (LSRC) at General Electric Aircraft Engines to investigate the effects of flow coefficient, stagger angle, and tip clearance on tip vortex. Time resolved casing pressure distributions...

... are regarded as low efficiency machines if efficiency is less than 40 percent or 50 percent. Considering that not only low Reynolds number and tip clearance but the design method are the major causes for low performance, we carried out the performance test experimentally using two semi-open centrifugal...