The incompressible two-dimensional potential flow through blades of a rotating radial impeller

Hassenpflug, W.C.

doi:10.1016/j.mcm.2010.04.022

Cited by 7 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The factor can be obtained theoretically and experimentally. The typical investigations include those conducted by Kasai [2,3], Sakai and Watanabe [4], Noorbakhsh [5], Whitfield [6], Murata et al [7], Harada and Senoo [8], Visser et al [9], von Backstron [10], Hassenpflug [11], Ji et al [12], Qiu et al [13], and so on. The slip factor depends on impeller geometry [5,7,9,10,14], flow rate [2-4, 6, 13, 15], and viscosity of the liquid pumped [16,17].…”

Section: Introductionmentioning

confidence: 99%

Effects of Flow Rate and Viscosity on Slip Factor of Centrifugal Pump Handling Viscous Oils

2013

International Journal of Rotating Machinery

View full text Add to dashboard Cite

Slip factor is an important parameter in the hydraulic design of centrifugal pump impeller for handling viscous oils. How to extract the factor from CFD computational results and how flow rate and liquid viscosity to affect it remain unclear. In the present paper, the flip factor was estimated by means of two approaches: one is from the velocity triangles at the impeller outlet and the other is due to the impeller theoretical head of 3D turbulent viscous fluid. The velocity of water and viscous oils in the impeller and volute computed by CFD was validated with LDV measurements at the best efficiency point. The effect of exit blade angle on slip factor was clarified. It was shown that the two approaches result into two different slip factors. The factors are significantly dependent of flow rate; however, the liquid viscosity seems to take less effect on them. Volute is responsible for reduction in tangential velocity of liquid at the outlet of impeller at low flow rates. The slip factor of impeller with large exit blade angle is not sensitive to flow rate.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Flow Rate and Viscosity on Slip Factor of Centrifugal Pump Handling Viscous Oils

2013

International Journal of Rotating Machinery

View full text Add to dashboard Cite

show abstract

“…Since Wiesner's review, slip has remained a widely discussed topic in the field of centrifugal compressors. Hassenpflug [21] presented a solution to the potential flowfield of an impeller in the incompressible regime as well as an extensive review of analytical solutions published to that point. Using the so-called single relative eddy (SRE) method, proposed by von Backström [22], the relative eddy approach is implemented on the impeller as a whole rather than per blade passage.…”

Section: Slip Modelsmentioning

confidence: 99%

Investigation of Slip Models for High-Speed Centrifugal Compressors

Harrison

Lou

Key

2021

Journal of Propulsion and Power

View full text Add to dashboard Cite

show abstract

“…When superimposed on the meridional bulk flow at the impeller exit, the relative eddy causes a reduction in the exit tangential flow velocity, i.e., slip. Stodola's original discussion was intentionally simplified and qualitative in nature, but numerous researchers later published exact solutions for the potential flow field in impeller passages in which slip was confirmed to be an inviscid phenomenon [2][3][4][5][6][7].…”

Section: V02et39a003-1mentioning

confidence: 99%

A New Approach to Modeling Slip and Work Input for Centrifugal Compressors

Harrison

Key

2020

Volume 2E: Turbomachinery

View full text Add to dashboard Cite

A new method of modeling slip factor and work input for centrifugal compressor impellers is presented. Rather than using geometry to predict the behavior of the flow at the impeller exit, the new method leverages governing relationships to predict the work input delivered by the impeller with dimensionless design parameters. The approach incorporates both impeller geometry and flow conditions and, therefore, is inherently able to predict the slip factor both at design and off-design conditions. Five impeller cases are used to demonstrate the efficacy of the method, four of which are well documented in the open literature. Multiple implementations of the model are introduced to enable users to customize the model to specific applications. Significant improvement in the accuracy of the prediction of slip factor and work input is obtained at both design and off-design conditions relative to Wiesner’s slip model. While Wiesner’s model predicts the slip factor of 52% of the data within ±0.05 absolute error, the most accurate implementation of the new model predicts 99% of the data within the same error band. The effects of external losses on the model are considered, and the new model is fairly insensitive to the effects of external losses. Finally, detailed procedures to incorporate the new model into a meanline analysis tool are provided in the appendices.

show abstract

The incompressible two-dimensional potential flow through blades of a rotating radial impeller

Cited by 7 publications

References 32 publications

Effects of Flow Rate and Viscosity on Slip Factor of Centrifugal Pump Handling Viscous Oils

Effects of Flow Rate and Viscosity on Slip Factor of Centrifugal Pump Handling Viscous Oils

Investigation of Slip Models for High-Speed Centrifugal Compressors

A New Approach to Modeling Slip and Work Input for Centrifugal Compressors

Contact Info

Product

Resources

About