Verification of an Impeller Design by Laser Measurements and 3D-Viscous Flow Calculations

Krain, H.; Hoffman, Wendy B.

doi:10.1115/89-gt-159

Cited by 43 publications

(23 citation statements)

References 5 publications

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“…Eckardt's laser anemometer measurements in a radial outflow impeller provided the first experimental evidence in high-speed impellers of the development of a "wake" of low-momentum fluid near the suction surface/ shroud corner of the blade passage (Eckardt, 1976). Krain (1988), Krain and Hoffman (1990), Ahmed and Elder (1990), Sipos (1991), and Rohne and Banzhaf (1990) acquired laser anemometer measurements in backswept impellers which indicate that the wake develops near the shroud at midpitch.…”

Section: Introductionmentioning

confidence: 99%

“…In lieu of detailed experimental measurements of the secondary flow fields in unshrouded impellers, several investigators used three-dimensional Navier-Stokes numerical solutions to generate secondary flow details (Krain andHoffman, 1989, 1990;Hah and Krain, 1990;Bansod and Rhie, 1990;Moore and Moore, 1990). Fagan and Fleeter (1991) also presented calculated secondary flow field results for their shrouded impeller.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Computational Investigation of the NASA Low-Speed Centrifugal Compressor Flow Field

Hathaway

Chriss

Wood

et al. 1993

Journal of Turbomachinery

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An experimental and computational investigation of the NASA Low-Speed Centrifugal Compressor (LSCC) flow field has been conducted using laser anemometry and Dawes’ three dimensional viscous code. The experimental configuration consists of a backswept impeller followed by a vaneless diffuser. Measurements of the three-dimensional velocity field were acquired at several measurement planes through the compressor. The measurements describe both the throughflow and secondary velocity field along each measurement plane. In several cases the measurements provide details of the flow within the blade boundary layers. Insight into the complex flow physics within centrifugal compressors is provided by the computational analysis, and assessment of the CFD predictions is provided by comparison with the measurements. Five-hole probe and hot-wire surveys at the inlet and exit to the rotor as well as surface flow visualization along the impeller blade surfaces provide independent confirmation of the laser measurement technique. The results clearly document the development of the throughflow velocity wake, which is characteristic of unshrouded centrifugal compressors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Computational Investigation of the NASA Low-Speed Centrifugal Compressor Flow Field

Hathaway

Chriss

Wood

et al. 1993

Journal of Turbomachinery

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“…In recent years, as a result of improvements in experimental techniques and numerical methods, it has been possible to avoid the non-uniformity of exit flow field in order to obtain improved efficiency and stability of an impeller. The work of Eckardt's [1] and Krain's [2] are most representative in all related experimental research. Their studies indicated that both complicated secondary flows and separated boundary layer would cause the radial and circumferential non-uniform flows at the outlet, and consequently the performance of the centrifugal compressor decreases.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, some numerical codes have also been developed to study the flowfield in centrifugal compressor by other researchers. Most of them [2][3][4] have provided the detailed flowfield to understand the complicated flow. However, CFD is still a little immature and does not reach the engineering implementation level.…”

Section: Introductionmentioning

confidence: 99%

Predication of 3-D Viscous Flowfield of a Centrifugal Impeller

Gao

Feng²,

Xie³

2011

EPE

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A three-dimensional viscous code has been developed to solve Reynolds-averaged Navier-Stokes equations. The governing equations in finite volume form are solved by two-step Runge-Kutta scheme with implicit residual smoothing. The eddy viscous is obtained using the Baldwin-Lomax model. A prediction of the 3-D turbulent flow and the performance in the "all-over controlled vortex distribution" centrifugal impeller with a vaneless diffuser has been made for the compressor at design and off-design condition. The predicted efficiency is a little higher than the experiment data. These results suggest that the present calculation code is able to determine the flow development in the impeller and also the turbulence model in the centrifugal impeller should be improved.

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“…The reported works by Eckardt [1], Johnson et al [2], Kjork et al [3], Denton [4], Dawes [5], Casey et al [6], Bansod et al [7], Krain et al [8], Farge et al [9] and Zhang et al [10] are an indicative collection of research efforts on the computation and the experimental verification of the flowfields within centrifugal impellers.…”

Section: Introductionmentioning

confidence: 99%

Parametric Study of a Centrifugal Pump Impeller by Varying the Outlet Blade Angle

Bacharoudis

Filios²,

Mentzos³

et al. 2008

TOMEJ

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Abstract:The pump design is facilitated by the development of computational fluid dynamics and the complex internal flows in water pump impellers can be well predicted. Various parameters affect the pump performance and energy consumption. The impeller outlet diameter, the blade angle and the blade number are the most critical. The present paper describes the simulation of the flow into the impeller of a laboratory pump in a parametric manner. In this study, the performance of impellers with the same outlet diameter having different outlet blade angles is thoroughly evaluated. The one-dimensional approach along with empirical equations is adopted for the design of each impeller. The predicted performance curves result through the calculation of the internal flow field and a successful correlation of local and global parameters. The numerical solution of the discretized three-dimensional, incompressible Navier-Stokes equations over an unstructured grid is accomplished with a commercial CFD finite-volume code. For each impeller, the flow pattern and the pressure distribution in the blade passages are calculated and finally the head-capacity curves are compared and discussed.

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Verification of an Impeller Design by Laser Measurements and 3D-Viscous Flow Calculations

Cited by 43 publications

References 5 publications

Experimental and Computational Investigation of the NASA Low-Speed Centrifugal Compressor Flow Field

Experimental and Computational Investigation of the NASA Low-Speed Centrifugal Compressor Flow Field

Predication of 3-D Viscous Flowfield of a Centrifugal Impeller

Parametric Study of a Centrifugal Pump Impeller by Varying the Outlet Blade Angle

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