Automatic swirl angle measurements for pump intake design

Fockert, Anton de; Westende, J.M.C. van ’t; Verhaart, F.I.H.

doi:10.1080/00221686.2014.989459

Cited by 4 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the asymmetric velocity distribution or swirl flow arises from the intake upstream, the pump’s performance may be significantly affected. 25…”

Section: Intake Performance Evaluation Methodsmentioning

confidence: 99%

“…When the asymmetric velocity distribution or swirl flow arises from the intake upstream, the pump's performance may be significantly affected. 25 To evaluate the performance of the intake, the distribution of the axial velocity and swirl flow at intake outlet are investigated. The axial velocity distribution is evaluated by the uniformity and the weighted average angle of the axial velocity at the intake outlet, which are expressed as follows.…”

Section: Quantification Of Outflow Velocity Distribution and Hydrauli...mentioning

confidence: 99%

See 1 more Smart Citation

The effect of bell mouth height on the hydraulic characteristics of the two-way pumping station based on the parameter design

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

Pump intake is an important part of pumping station. To improve the inflow condition of the two-way pumping station, the optimal design of two-way intake of an in-operation pumping station was carried out based on the numerical and experimental study. A design scheme that incorporates the parametric design of the bell mouth height by introducing a parabola, and combined criteria for comprehensively evaluating the performance of the two-way intake, was developed to better estimate the outflow conditions. Moreover, the flow regime in intake and its’ influence on the impeller performance were comprehensively analyzed. With the verified results by the experimental test, they show that the uniformity of intake outflow affects both the hydraulic performance and forces of the impeller. As the bell mouth height decreases, the partial flow in intake has been greatly improved. Furthermore, it has been found that a more uniform outflow suppresses the adverse flow conditions on blade surfaces making the rotor more evenly stressed, while the excessively low height causes the serious hydraulic loss in intake. The present study is helpful in enhancing the operational performance of the two-way pumping station.

show abstract

“…When the asymmetric velocity distribution or swirl flow arises from the intake upstream, the pump’s performance may be significantly affected. 25…”

Section: Intake Performance Evaluation Methodsmentioning

confidence: 99%

Section: Quantification Of Outflow Velocity Distribution and Hydrauli...mentioning

confidence: 99%

The effect of bell mouth height on the hydraulic characteristics of the two-way pumping station based on the parameter design

Zhang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

show abstract

“…This large range in swirl angles is related to the stability of the flow patterns near the pump. De Fockert et al ( [2]) showed that for a pump compartment including splitte rs the range in swirl angle is m uch lowe r than for an em pty pum p com partment. In our investigation, large swirl angles up to 16° were created.…”

Section: Discussionmentioning

confidence: 99%

“…Swirl is measured by means of 4 magnets on the vanes of a low friction Perspex swirl meter, which are tracked by 3 sensors on the outer tube. This measurement method, including the obtained accuracy is extensively described in De Fockert et al ( [2]). …”

Section: Model Pumpmentioning

confidence: 99%

Measuring swirl at a model scale of 1:1 for vertically submersible pumps

Fockert

Verhaart

Czarnota³

et al. 2016

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Abstract.Intakes of large pump stations are often designed with the aid of hydraulic modeling. The approach flow to pumps is tested for adverse hydraulic phenomena, such as pre-swirl, velocity variations and vortices. Most commonly, the limits for these phenomena are taken from the ANSI/HI 9.8-2012 standard -Rotodynamic Pumps for Pump Intake Design. The standard, however, does not explain how real pumps respond to swirl, uneven velocity distribution or vortices. The present joined study between Deltares and Xylem aims to bridge this gap. At the Deltares pump sump test facility, two identical pump compartments were built according to the ANSI/HI 9.8-2012 standard. In one of the compartments, a submersible, vertical column pump (Flygt PL7020) was installed, while a 1:1 scale model of that pump was installed in the other compartment. This arrangement allowed measurements of both pump performance (pump head and input power as a function of flow rate) and the model parameters (pre-rotation and vortex occurrence) for nearly identical approach flow conditions. By varying the geometry of the approach channels, the asymmetry of the flow was varied to produce various degrees of pre-swirl including values in excess of the commonly accepted limit of 5 degrees. This paper describes the measurement setup, the results of the measurements with the model pump and the measurement plan for the prototype pump.

show abstract

“…CFD analysis previously carried out on intake structure was mainly focused on the optimization of pump-sump design [5][6][7][8], the analysis of the internal flow patterns and what measures shall be taken to reduce the swirl flow and vortex, and the effect comparison between different measures and their combinations [9][10][11][12], but few of them were related to the prediction of flow condition of pump and the calculation of hydraulic loss of sump at different intake water levels. There were plenty of numerical simulations on outflow structure; however, it was rare to study the performance of pumping system through calculation of hydraulic loss and combined with the pump performance.…”

Section: Introductionmentioning

confidence: 99%

Performance prediction of pump and pumping system based on combination of numerical simulation and non-full passage model test

Zhu

Zhou

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

The design scheme of open intake will often increase the shaft length and the height of wet-pit pump house when the range of intake water level varies relatively large. And if the pump house is far away from the discharge bay, a longer discharge pipe may be inevitable, and the arrangement of full passage model pumping system may exceed the allowed size of a specific test bench. Aiming at a long-shaft vertical pumping system with open intake design, larger water level variation and longer discharge pipe, a methodology of performance prediction for the pump and pumping system was proposed by combining numerical simulation and non-full passage model test because of less experiment funds, shorter research periods and restricted test bench. Through numerical simulation, the hydraulic losses and drag coefficients of sump and discharge pipe were calculated and followed by the experiment design and model test of non-full passage pumping system. Based on the calibration accuracy of measurement instruments and test results, the experimental uncertainties were analyzed. Through combination of numerical simulation and non-full passage model test, the prediction of model pump and pumping system performance was realized. The performance of prototype pump and pumping system was obtained by applying the similarity law of pump. When operated under the designed head of 13.59 m, the flow rate and efficiency of the prototype pumping system reached 11.86 m 3 /s and 86.56%, respectively, exceeding the requirements stipulated in the bidding documents and showing that it possessed greater pumping capacity and higher efficiency. The methodology proposed in this paper can be referenced and applied to the engineering design of similar pump stations.

show abstract

Automatic swirl angle measurements for pump intake design

Cited by 4 publications

References 2 publications

The effect of bell mouth height on the hydraulic characteristics of the two-way pumping station based on the parameter design

The effect of bell mouth height on the hydraulic characteristics of the two-way pumping station based on the parameter design

Measuring swirl at a model scale of 1:1 for vertically submersible pumps

Performance prediction of pump and pumping system based on combination of numerical simulation and non-full passage model test

Contact Info

Product

Resources

About