Visual experiment and numerical simulation of cavitation instability in a high-speed inducer

Cui, Baoling; Chen, Jie

doi:10.1177/0957650919867173

Cited by 11 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High-speed centrifugal pumps are widely used in the aerospace, petrochemical, and metallurgical fields. 1 The impeller inlet liquid easily achieves cavitation due to high rotational speed. One effective measure to ensure stable operation of centrifugal pump is the installment of the inducer in front of the centrifugal impeller, which improves the cavitation performance of the pump.…”

Section: Introductionmentioning

confidence: 99%

Influence of air–water two-phase flow on the performance of a high-speed inducer

Cui

Cai

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

Self Cite

View full text Add to dashboard Cite

This study is to reveal the influence of incoming flow containing air on the internal flow and performance of a high-speed inducer. Numerical calculations were performed herein under different air volume fraction conditions based on the shear-stress transport turbulence model and the Eulerian–Eulerian heterogeneous flow model. The external characteristic, cavitation performance and visualization experiment were conducted under the air–water two-phase condition. As a result, the effect of incoming flow containing air under small flow rate condition on the decline of the inducer head was larger than that under large flow rate condition. The proper air volume fraction was beneficial to the improvement of the inducer cavitation performance. As the air volume fraction increased, the pressure gradients in the axial and radial directions of the inducer gradually reduced and the supercharging performance of the inducer also worsened. The flow near the hub in the flow channel became messy, and the turbulence energy increased. The air mainly concentrated in the leading edge rim and the low blade height region near the hub in the flow channel. The air expanded in the circumferential, radial and axial direction as the air volume fraction increased.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of air–water two-phase flow on the performance of a high-speed inducer

Cui

Cai

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

Self Cite

View full text Add to dashboard Cite

show abstract

“…The SST k  − turbulence model is adopted in the numerical simulations, which is suitable for the boundary layer of high-speed flows [17][18][19][20][21][22][23][24][25][26].…”

Section: Turbulence Modelmentioning

confidence: 99%

The effect of reflux schemes in hydrogen peroxide electric pump on anti-cavitation of inducer

Tian

et al. 2023

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Hydrogen peroxide electric pump supply system can provide an improvement to hybrid rocket motor performance. Due to the physical and chemical properties of hydrogen peroxide, a canned pump scheme is more suitable to be used in hybrid rocket motor. The high-temperature liquid between the rotor and stator of the electric pump, returning to the inlet of the inducer, has a considerable influence on the anti-cavitation performance. The numerical simulation results show that the optimal reflux scheme is different when the inlet pressure range of the inducer is different. When the inlet pressure of the inducer is 0.4 MPa, the performance of the inducer is less affected by the reflux schemes, and the optimal scheme is the axial scheme in the simulation. When the inlet pressure is 0.12 MPa and there is a large cavitation area in the inducer, the radial reflux scheme is better than the axial and mixed reflux. When the inlet pressure is 0.1 MPa and the cavitation areas almost extend to the whole blade passage, the radial reflux scheme is much better than the axial and mixed reflux.

show abstract

“…And the stability of bubble with different cavitation number and flow conditions are introduced by Wang et al [14]. As Cui et al [15,16] summarized, the evolution of inducer flow features includes vortex cavitation, sheet cavitation, cloud cavitation, and backflow cavitation, as well as cavitation surge.…”

Section: Introductionmentioning

confidence: 99%

Investigation of cavitation evolvement in a pump inducer by proper orthogonal decomposition analysis of video images

Cao,

Yuan,

Kong

et al. 2023

Meas. Sci. Technol.

View full text Add to dashboard Cite

The aim of this study is to develop a contour extraction method for the investigation of the temporal and spatial characteristics of cavitation evolution in high-speed inducers. Cavitation experiments were conducted, and corresponding snapshots were captured using a high-speed camera subsequently. The raw images were processed while using threshold value filtering techniques to extract only relevant bubble information. Proper orthogonal decomposition was employed to explore the evolving characteristics in a quantitative manner. Results show that the cavitation evolution process is an unsteady process when viewed from the side. In high net positive suction head (NPSH) environments, multiple small-scale spatial modals contribute significantly to the effective proportion of the cavitation structure. The attached sheet cavitation exists in the blade edge which is the main embodiment of cavitation area evolvement. Under low NPSH conditions, the primary flow feature can be reflected by a low-mode flow pattern, associated with the inducer’s rotation effect. The evolving regulation of cavitation area in developed stage is closely submitted to the trigonometric function. And the exhibited spatial coefficient exposes the hidden reflux vortex feature. The proposed image separation techniques enable the quantification of morphological features, which can provide technical details for the digital design of inducers.

show abstract

Visual experiment and numerical simulation of cavitation instability in a high-speed inducer

Cited by 11 publications

References 20 publications

Influence of air–water two-phase flow on the performance of a high-speed inducer

Influence of air–water two-phase flow on the performance of a high-speed inducer

The effect of reflux schemes in hydrogen peroxide electric pump on anti-cavitation of inducer

Investigation of cavitation evolvement in a pump inducer by proper orthogonal decomposition analysis of video images

Contact Info

Product

Resources

About