Near-exit flow-field investigation in an inducer including laser-Doppler velocimetry

Howard, J. H. G.; Atif, Abdelmadjid

doi:10.1016/0142-727x(93)90044-n

Cited by 3 publications

(7 citation statements)

References 4 publications

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“…The inducer was arrayed in a test rig which provided a straight inlet section as shown in Figure 1. The test conditions employed for the measurement of the velocity fields near the exit involved flow into a short annulus dumping into a symmetric outlet, to avoid non-axisymmetric conditions at the outlet (Howard and Atif, 1993). The same geometry was modelled for the viscous flow analysis.…”

Section: Geometry and Performance Of Inducermentioning

confidence: 99%

“…The circumferentially-distributed velocity measurements with which the predictions are compared were obtained using a laser-Doppler velocimeter. Details of the experimental technique are included in (Howard and Atif, 1993). The method only allowed measurement of the axial and tangential components of velocity.…”

Section: Geometry and Performance Of Inducermentioning

confidence: 99%

“…(1987) is added which makes the discretization formally second order accurate. The linearized equations are solved using a coupled algebraic multigrid method known as Additive Correction Multigrid of Hutchinson and Raithby (1986), which allows solution of fine grids without degradation of linear solver performance. TASCflow is applicable to incompressible, subsonic, transonic and supersonic flows, in stationary or rotating frames of reference.…”

Section: Figure 3 Inducer Geometry With Surface Mesh Computational Mementioning

confidence: 99%

“…(2) Experiments were performed both with and without a nose cone. The measured data used in the comparisons (Howard and Atif, 1993) are for the case of no nose cone, while the calculations include the nose cone. Measurement experience indicates this effect is small at design flow, but it is planned to check this by further calculations.…”

Section: Comparison Between Numerical Predictions and Measured Performentioning

confidence: 99%

“…A recent study on a constant spiral angle inducer of low solidity was carried out by Boccazzi et al (1990). The study chosen as the base for the present flow analysis investigated the internal flow field near the impeller entry (Howard et al, 1987), (Abramian et al, 1988), and at the exit (Howard and Atif, 1993). It was observed that stall patches began to form at the entry tip region of the impeller blades at flows only modestly below design.…”

Section: Introductionmentioning

confidence: 99%

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Flow Analysis in a Spiral Inducer Impeller

Howard

Hutchinson²,

Broberg³

1993

Volume 3A: General

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The flow within an axial-flow spiral inducer impeller is complex and three-dimensional. The long but tightly-spiralled passages give rise to secondary flow fields strongly influenced by the blade walls. Flow analysis in such an impeller is carried out by a three-dimensional viscous flow code and compared with previously published LDV measurements. Due to the extreme blade angles of the inducer, an unconventional meshing strategy is required in order to prevent high mesh non-orthogonality. Details of that strategy are provided. Tip clearance modelling was not incorporated in this first stage of investigation. Despite this, the flow analysis reveals the pattern of development of the secondary flow field along the length of the high solidity passage consistent with the LDV data but in much greater detail than was possible with the limited capability of the measurement system. Predicted flow patterns upstream suggest preconditions for the initiation of the observed induction of upstream flow swirl at reduced flow rates.

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Section: Geometry and Performance Of Inducermentioning

confidence: 99%

Section: Geometry and Performance Of Inducermentioning

confidence: 99%

Section: Figure 3 Inducer Geometry With Surface Mesh Computational Mementioning

confidence: 99%

Section: Comparison Between Numerical Predictions and Measured Performentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Flow Analysis in a Spiral Inducer Impeller

Howard

Hutchinson²,

Broberg³

1993

Volume 3A: General

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Experimental Comparison of Flow Fields at the Inlet and the Outlet of an Inducer With Shrouded and Unshrouded Configurations

Offtinger

Henry

Morel

et al. 1997

Journal of Fluids Engineering

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The flow field was measured near the inlet and the outlet of an axial flow inducer with shrouded and unshrouded configurations combined with a centrifugal pump. Investigations were conducted using a five-hole probe for several flow rates. The shroud induces a counterrotating flow at the inlet and a blockage effect at the outlet in the region of the tip and for all flow rates. The radial distribution of losses keeps the same shape in both configurations, however, the loss level is higher with the shroud, giving a lower efficiency for the combined inducer-impeller configuration. Effects of shrouded inducer on part load instability are not clear and deserve more research, which is in progress.

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Characteristics of Exit Flow and Performance of a Turbopump Inducer

2003

Journal of Fluid Machinery

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Near-exit flow-field investigation in an inducer including laser-Doppler velocimetry

Cited by 3 publications

References 4 publications

Flow Analysis in a Spiral Inducer Impeller

Flow Analysis in a Spiral Inducer Impeller

Experimental Comparison of Flow Fields at the Inlet and the Outlet of an Inducer With Shrouded and Unshrouded Configurations

Characteristics of Exit Flow and Performance of a Turbopump Inducer

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