Three-Dimensional Flow Analysis and Improvement of Slip Factor Model for Forward-Curved Blades Centrifugal Fan

Guo, En-Min; Kim, Kwang-Yong

doi:10.1115/fedsm2003-45404

Cited by 4 publications

(2 citation statements)

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“…Recently, Slip factor is increasingly estimated by using CFD approach [18][19][20][21][22]. Thus it is necessary to explore effects of viscosity and flow rate on slip factor when a centrifugal pump handles viscous oils.…”

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

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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.

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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

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“…Seo et al 8 developed a mathematical model of impeller forces to reduce the computing time and storage for the calculations of three-dimensional viscous flow in a forward-curved blade centrifugal fan. Guo and Kim 9 developed an improved slip factor model and correction method to predict flow in the impeller of a forward-curved blade centrifugal fan, and demonstrated their methods through both three-dimensional steady and unsteady Navier-Stokes analyses. Hayashi et al 10 examined the influences affecting the geometry of the scroll casing in a forward-curved blade centrifugal fan through experiments and numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

Aerodynamic and aeroacoustic optimization for design of a forward-curved blades centrifugal fan

Heo

Kim

Seo

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part A:

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This paper presents a multidisciplinary optimization procedure for enhancing the aerodynamic and aeroacoustic performance of a forward-curved blade centrifugal fan for residential ventilation. Flow analysis in a forward-curved blade centrifugal fan was conducted by solving three-dimensional steady and unsteady Reynolds-averaged Navier-Stokes equations using the shear stress transport turbulence model. On the basis of the aerodynamic sources extracted from the unsteady flow, aeroacoustic analysis was implemented in a finite/infinite element method by solving the variational formulation of Lighthill's analogy. Experiments were performed to obtain aerodynamic and aeroacoustic measurements for validation of numerical results. The single-and multi-objective optimizations were performed sequentially. The single-objective optimization was carried out to improve the efficiency of the fan using a radial basis neural network surrogate model with four design variables defining the scroll cutoff angle, scroll diffuser expansion angle, diameter ratio of the impeller, and blade exit angle. Multi-objective optimization based on the single-objective optimization result was carried out to simultaneously improve the efficiency and reduce the sound pressure through a hybrid multi-objective evolutionary algorithm coupled with a response surface approximation surrogate model with two design variables defining the scroll cutoff radius and distance. These objective functions were accessed numerically through threedimensional aerodynamic and aeroacoustic analyses at the design points sampled by Latin hypercube sampling in the design space. Arbitrary selected optimum designs in the Pareto-optimal solutions yielded significant increases in efficiency and decreases in the sound pressure level compared to the reference design.

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Experimental and numerical investigation of slip factor reduction in centrifugal slurry pump

Abdolahnejad

Moghimi

Derakhshan

2021

J Braz. Soc. Mech. Sci. Eng.

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Three-Dimensional Flow Analysis and Improvement of Slip Factor Model for Forward-Curved Blades Centrifugal Fan

Cited by 4 publications

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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

Aerodynamic and aeroacoustic optimization for design of a forward-curved blades centrifugal fan

Experimental and numerical investigation of slip factor reduction in centrifugal slurry pump

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