... for level II stability analysis of impellers. Such data are then incorporated into rotor-bearing vibration response models. Despite recent advancements in high fidelity, general modeling (i.e., three-dimensional viscous transient nonaxisymmetric model) of closed impeller rotordynamic forces, no such general...

...Baofeng Yang; Bin Li; Hui Chen; Zhanyi Liu; Kaifu Xu The clocking positions between the inducer and the impeller have a certain impact on the performance of the high-speed centrifugal pump, which however, is often ignored by designers. In the present study, three-dimensional numerical simulation...

... was evaluated numerically by using a CFD code. The “sudden-rising head effect” is confirmed to exist at a higher viscosity and a certain large surface roughness. The viscosity and roughness, which make a transition of boundary layer flow pattern in both the impeller and volute to the hydraulically smooth regime...

... Impellers ,” Bull. JSME , 3 ( 9 ), pp. 19 – 29 . 10.1299/jsme1958.3.19 [3] Kasai , T. , and Takamatu , Y. , 1964 , “ Flow in a Radial Impeller With Cavitation ,” Bull. JSME , 7 ( 27 ), pp. 543 – 552 . 10.1299/jsme1958.7.543 [4] Stopskii , S. B. , 1957 , “ Acoustic Method...

... ), pp. 331 – 345 . 10.1002/fld.1650050404 Jansen , W. , and Kirschner , A. M. , 1974 , “ Impeller Blade Design Method for Centrifugal Compressors ,” Fluid Mechanics, Acoustics, and Design of Turbomachinery , NASA, SP-304, pp. 537 – 563 . Tan , C. S. , Hawthorne , W. R...

...Wen-Guang Li The two-step method for optimizing net positive suction head required (NPSHr) of axial-flow pumps is proposed in this paper. First, the NPSHr at the impeller tip is optimized with impeller diameter based on experimental data of 2D cascades in available wind tunnels...

...Shuhong Liu; Michihiro Nishi; Kouichi Yoshida The objective of the present study is to investigate the suitable impeller geometry for a mini turbo-pump, which is defined as the size having impeller diameter between around 5 mm and 50 mm. This is treated because those pumps having the above size...

...Steven M. Miner, Associate Professor, This paper presents the results of a study using coarse grids to analyze the flow in the impellers of an axial flow pump and a mixed flow pump. A commercial CFD code (FLOTRAN) is used to solve the 3-D Reynolds Averaged Navier Stokes equations in a rotating...