Analysis of Inducer Recirculating Inlet Flow

Bario, F.; Faure, Thierry; Jondeau, Emmanuel; Normand, Jean-Luc; Duc, Jean-Michel Nguyen

doi:10.2514/2.6145

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…If it does pass in front of the leading edge, it does not appear to reach the upstream traverse location where no correlation with impeller position was found in the LDA data. Reference [16] suggests that the recirculation in an axial inducer may be due to 'an inviscid vortex coming from the inducer' and 'a strongly three-dimensional effect coupled with an incidence effect along the leading edge span'. This description lends considerable support to the recirculation vortex proposed in this paper.…”

Section: Recirculation Vortex At 49 Per Cent Of Design Flowratementioning

confidence: 99%

“…Some references exist that describe the experimental investigation of the recirculating flow upstream of axial inducers in rocket fuel pumps [15,16]. Reference [15] is a PIV study close upstream of a three-vaned inducer; reverse flow is found at the casing even at the design point.…”

mentioning

confidence: 99%

“…The authors believe that the reverse flow is associated 'with tip vortex cavitation and leakage flow from the pressure side'. Reference [16] gives a detailed study of the time-resolved flowfield upstream of a fourvaned inducer. This, too, showed reverse flow at the casing, even at the design point.…”

mentioning

confidence: 99%

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Low flowrate effects in a centrifugal pump impeller

Rose

2004

Proceedings of the Institution of Mechanical Engineers, Part A:

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This paper reports on an experiment in a centrifugal pump at low flowrates. A variety of measurement techniques was used: laser Doppler anemometry (LDA), impeller vane surface static pressure, a three-hole pneumatic probe and time-resolved static pressure. Some light is shed on the flow mechanisms present in the impeller off design. Evidence is found of a recirculation vortex, at 49 per cent of design flow-rate, in the impeller flow passages. From design flowrate down to 46 per cent of design flowrate there is no evidence of rotating stall, which first appears at 43 per cent. The most likely interpretation of this result is that there is a three-cell rotating stall system with the cells rotating at approximately 43 per cent of the impeller rotational speed. At 20 per cent of the design flowrate, the fluid in the inlet pipe ‘prerotates’ with no time mean flow reversal, interpreted as a developed stall cell system.

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Section: Recirculation Vortex At 49 Per Cent Of Design Flowratementioning

confidence: 99%

mentioning

confidence: 99%

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Low flowrate effects in a centrifugal pump impeller

Rose

2004

Proceedings of the Institution of Mechanical Engineers, Part A:

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Study of the turbulent swirl flow in the pipe behind the axial fan impeller

Čantrak

Damjanović

Janković

2016

Mechanics & Industry

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Effects of a Bearing Strut on the Performance of a Turbopump Inducer

Choi

Noh

Kim

et al. 2006

Journal of Propulsion and Power

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Experimental and computational studies on an inducer with and without a bearing strut were performed to evaluate the effects of a strut on the performance of an inducer. Global performance data, such as head rise and efficiency, and detailed flow characteristics, such as surface static pressures, were measured and compared with computational results. Generally, a good agreement is observed between experimental and computational results, but some discrepancies are observed due to complex flow features such as backflows at the inlet and strut/inducer interactions. For the flow rates where the backflow region is large, installing a strut enhanced the hydraulic performance of the inducer by diminishing the size of the backflows. The results also show that the strut has negligible effect on the suction performance of the inducer. Nomenclature= inducer axial length at hub Q = volume flow rate r = dimensionless radius, r r h =r s r h U = speed of the blade z = axial coordinate = blade or relative flow angle = efficiency = cavitation number, 2p 1t p v =U 2 1t = flow coefficient,= tip or total z = axial direction 1 = inducer inlet 2 = inducer outlet

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Analysis of Inducer Recirculating Inlet Flow

Cited by 7 publications

References 11 publications

Low flowrate effects in a centrifugal pump impeller

Low flowrate effects in a centrifugal pump impeller

Study of the turbulent swirl flow in the pipe behind the axial fan impeller

Effects of a Bearing Strut on the Performance of a Turbopump Inducer

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