The Effect of the Operating Point on the Pressure Fluctuations at the Blade Passage Frequency in the Volute of a Centrifugal Pump

Parrondo, Jorge; González-Pérez, José; Francos, Joaquín Fernández

doi:10.1115/1.1493814

Cited by 128 publications

(54 citation statements)

References 7 publications

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“…A very satisfactory comparison between calculations and experimental results is presented (see Parrondo-Gayo et al [10]) Several others' works (Gu et al [11]; Muggli et al [12]; Cravero and Marini [13]) have shown good agreement between simulation and experimental results.…”

Section: Cfd In the Turbomachinerymentioning

confidence: 56%

Numerical Modelization of the Flow in Centrifugal Pump: VoluteInfluence in Velocity and Pressure Fields

Asuaje

Bakir

Kouidri

et al. 2005

International Journal of Rotating Machinery

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A 3D-CFD simulation of the impeller and volute of a centrifugal pump has been performed using CFX codes. The pump has a specific speed of 32 (metric units) and an outside impeller diameter of 400 mm. First, a 3D flow simulation for the impeller with a structured grid is presented. A sensitivity analysis regarding grid quality and turbulence models were also performed. The final impeller model obtained was used for a 3D quasi-unsteady flow simulation of the impeller-volute stage. A procedure for designing the volute, the nonstructured grid generation in the volute, and the interface flow passage between the impeller and volute are discussed. This flow simulation was carried out for several impeller blades and volute tongue relative positions. As a result, velocity and pressure field were calculated for different flow rates, allowing to obtain the radial thrust on the pump shaft.

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Section: Cfd In the Turbomachinerymentioning

confidence: 56%

Numerical Modelization of the Flow in Centrifugal Pump: VoluteInfluence in Velocity and Pressure Fields

Asuaje

Bakir

Kouidri

et al. 2005

International Journal of Rotating Machinery

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show abstract

“…The shape and location of the volute tongue also significantly affecting the pump performance such as the measurement done by Lipski [19]. Parrondo-Gayo et al [20] experiment with mounting of pressure transducers on front side of volute circumferentially around impeller outlet, found that pressure fluctuations and amplitudes are to be very dependent on both angular position and flow rate, maximum values corresponded to the tongue region for off-design conditions.…”

Section: Introductionmentioning

confidence: 99%

Unsteady Analysis of Impeller-Volute Interaction in Centrifugal Pump

Cheah¹,

Lee²,

Winoto³

2011

International Journal of Fluid Machinery and Systems

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An unsteady numerical analysis has been carried out to study the strong impeller volute interaction of a centrifugal pump with six backward swept blades shrouded impeller. The numerical analysis is done by solving the threedimensional Reynolds Averaged Navier-Stokes codes with standard k-ε two-equations turbulence model and wall regions are modeled with a scalable log-law wall function. The flow within the impeller passage is very smooth and following the curvature of the blade in stream-wise direction. However, the analysis shows that there is a recirculation zone near the leading edge even at design point. When the flow is discharged into volute casing circumferentially from the impeller outlet, the high velocity flow is severely distorted and formed a spiraling vortex flow within the volute casing. A spatial and temporal wake flow core development is captured dynamically and shows how the wake core diffuses. Near volute tongue region, the impeller/volute tongue strong interaction is observed based on the periodically fluctuating pressure at outlet. The results of existing analysis also proved that the pressure fluctuation periodically is due to the position of impeller blade relative to tongue.

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“…Up to now, lots of numerical and experimental investigations have been carried out, and the fast Fourier transform (FFT) method has been proved to be the most powerful tool to unveil the frequency characteristics of pressure fluctuations. Yao et al [8] analysed both frequency domain and time-frequency domain in a double suction centrifugal pump based on fast Fourier transform (FFT) and time-frequency representation methods. Parrondo et al [9] also investigated the unsteady pressure distribution in a conventional centrifugal pump, and particular attention was paid on pressure fluctuations at blade passage frequency.…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Channel Head on the Unsteady Pressure Pulsation Characteristics at the Inlet and Outlet of Reactor Coolant Pumps

Long

Yin

Wang

et al. 2016

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. In this paper, CFD approach was employed to analyse the inlet and outlet pressure pulsation characteristics of reactor coolant pumps with different inflows. The Reynoldsaveraged Naiver-Stokes equations with the k-ε turbulence model were solved by the computational fluid dynamics software CFX to conduct the steady and unsteady numerical simulation. The numerical results of the straight pipe and channel head were validated with experimental data for the heads at different flow coefficients. In the nominal flow rate, the head of the pump with the channel head decreases by 1.19% when compared to the straight pipe. The channel head induces the inlet flow non-uniform, and the non-uniformity of the inflow induces the outlet flow of the pump with channel head different from that of the straight pipe. Meanwhile, the pressure pulsation signals are analysed using RMS, Standard Deviation and Peak-to-Peak Value method. At the points of the inlet and outlet, the pressure pulsation characteristics between the channel head and straight pipe are compared, and the difference is obviously. It is evident that the two different inflows of channel head and straight pipe have significant effect on the pump unsteady pressure pulsation. Finally, it is expected that the effects of non-uniform inflow on the pump performance and unsteady pressure pulsation are absolutely different from the uniform inflow. It is very important to provide accurate input conditions for the design and safety of the reactor.

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The Effect of the Operating Point on the Pressure Fluctuations at the Blade Passage Frequency in the Volute of a Centrifugal Pump

Cited by 128 publications

References 7 publications

Numerical Modelization of the Flow in Centrifugal Pump: VoluteInfluence in Velocity and Pressure Fields

Numerical Modelization of the Flow in Centrifugal Pump: VoluteInfluence in Velocity and Pressure Fields

Unsteady Analysis of Impeller-Volute Interaction in Centrifugal Pump

The Effect of the Channel Head on the Unsteady Pressure Pulsation Characteristics at the Inlet and Outlet of Reactor Coolant Pumps

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