Experimental Investigation and Passive Flow Control of a Cavitating Centrifugal Pump

Kyparissis, Spyridon D.; Margaris, Dionissios P.

doi:10.1155/2012/248082

Cited by 9 publications

(7 citation statements)

References 9 publications

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“…Results indicate that a significant delay in cavitation inception could be achieved. 123, 124 Kyparissis and Margaris 125,126 worked on different centrifugal pump blade designs, including double-arc synthetic blades and different blade leading edge angles. The investigation considered pump hydraulic performance and cavitation in tandem.…”

Section: B Blade Profile and Geometry Modificationmentioning

confidence: 99%

Cavitation control using passive flow control techniques

et al. 2021

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Passive flow control techniques, and particularly vortex generators have been used successfully in a broad range of aero-and hydrodynamics applications to alter the characteristics of boundary layer separation. This study aims to review how such techniques can mitigate the extent and impact of cavitation in incompressible flows. This review focuses first on vortex generators to characterize key physical principles. It then considers the complete range of passive flow control technologies, including surface conditioning and roughness, geometry modification, grooves, discharge, injection, obstacles, vortex generators, and bubble generators. The passive flow control techniques reviewed typically delay and suppress boundary layer separation by decreasing the pressure gradient at the separation point. The literature also identifies streamwise vortices that result in the transfer of momentum from the free stream to near-wall low energy flow regions. The area of interest concerns hydraulic machinery, whose performance and life span are particularly susceptible to cavitation. The impact on performance includes a reduction in efficiency and fluctuations in discharge pressure and flow, while cavitation can greatly increase wear of bearings, wearing rings, seals, and impeller surfaces due to excessive vibration and surface erosion. In that context, few studies have also shown the positive effects that passive controls can have on the hydraulic performance of centrifugal pumps, such as total head and efficiency. It is conceivable that a new generation of design in hydraulic systems may be possible if simple design features can be conceived to maximize power transfer and minimize losses and cavitation. There are still, however, significant research gaps in understanding a range of impact factors such as manufacturing processes, lifetime, and durability, and essentially how a static design can be optimized to deliver improved performance over a realistic range of operating conditions.

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Section: B Blade Profile and Geometry Modificationmentioning

confidence: 99%

Cavitation control using passive flow control techniques

et al. 2021

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“…Passive control of hydrofoil cavitation refers to disturb the flow by changing the surface structure or material properties of hydrofoils, so as to inhibit the occurrence and development of cavitation [15] , [16] . There are many studies on the passive control methods, such as setting obstacles on the hydrofoil surface [17] , [18] and modifying the airfoil profiles [19] , [20] . Lin et al [17] found that circular obstacles on the plane hydrofoil could stabilize the leading-edge cavitation and reduce the shedding cavitation.…”

Section: Introductionmentioning

confidence: 99%

Control mechanisms of different bionic structures for hydrofoil cavitation

Yang,

Li,

Xiao

et al. 2024

Ultrasonics Sonochemistry

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“…A study by Leighton et al has proven that acoustic data not only aids in cavitation detection and pump condition monitoring but also allows for estimations of cavitation scale and bubble population within a liquid [15]. Finally, deep learning techniques, including novel and improved CNN models, have demonstrated enhanced reliability in diagnosing deviations in pump operation [16] and piping leakage [17] using acoustic data…”

Section: Introductionmentioning

confidence: 99%

“…Detecting the cavitation phenomenon and determining its occurrence window in centrifugal pumps is crucial for both preventive maintenance and the optimal design of mechanical components such as blades. Kyparissis and Margaris have investigated the effects of design parameters on cavitation formation and the overall performance of centrifugal pumps, emphasizing the importance of understanding where and how cavitation occurs in different pump designs [16,23].…”

Section: Introductionmentioning

confidence: 99%

Early Detection of Cavitation in Centrifugal Pumps Using Low-Cost Vibration and Sound Sensors

et al. 2023

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The scope of this study is the evaluation of early detection methods for cavitation phenomena in centrifugal irrigation pumps by analyzing the produced vibration and sound signals from a low-cost sensor and data acquisition system and comparing several computational methods. Vibration data was acquired using the embedded accelerometer sensor of a smartphone device. Sound signals were obtained using the embedded microphone of the same commercial smartphone. The analysis was based on comparing the signals in different operating conditions with reference to the best efficiency operating point of the pump. In the case of vibrations, data was acquired for all three directional axes. The signals were processed by computational methods to extract the relative features in the frequency domain and use them to train an artificial neural network to be able to identify the different pump operating conditions while the cavitation phenomenon evolves. Three different classification algorithms were used to examine the most preferable approach for classifying data, namely the Classification Tree, the K-Nearest Neighbor, and the Support Vector Data algorithms. In addition, a convolutional neural network was utilized to examine the success rate of the classification when the datasets were formed as spectrograms instead. A detailed comparison of the classification algorithms and different axes was conducted. Comparing the results of the different methods for vibration and sound datasets, classification accuracy showed that in the case of vibration, the detection of cavitation in real conditions is possible, while it proves more challenging to identify cavitation conditions using sound data obtained with low-cost commercial sensors.

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Experimental Investigation and Passive Flow Control of a Cavitating Centrifugal Pump

Cited by 9 publications

References 9 publications

Cavitation control using passive flow control techniques

Cavitation control using passive flow control techniques

Control mechanisms of different bionic structures for hydrofoil cavitation

Early Detection of Cavitation in Centrifugal Pumps Using Low-Cost Vibration and Sound Sensors

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