Application of Spectral Kurtosis on vibration signals for the detection of cavitation in centrifugal pumps

Mousmoulis, Georgios; Yiakopoulos, Christos; Aggidis, George A.; Antoniadis, Ioannis; Anagnostopoulos, Ioannis

doi:10.1016/j.apacoust.2021.108289

Cited by 31 publications

(10 citation statements)

References 50 publications

(68 reference statements)

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“…To study the internal sound field of the centrifugal pump in detail, the basic Lighthill equation for the numerical simulation of flow-induced noise can be derived on the basis of the N S − equation and the momentum continuity equation. The specific formula is shown in Equation (10).…”

Section: Turbulence Kinetic Energymentioning

confidence: 99%

“…They obtained the contribution of pump inner surface fluid excitation, electromagnetic excitation and fluid excitation to the vibration characteristics of the centrifugal pump unit by the modal superposition method. Mousmoulis et al 10 detected and evaluated the shock wave caused by bubble implosion in the centrifugal pump using the spectral kurtosis tool and obtained the mechanism of the vibration signal in the centrifugal pump during cavitation. Matloobi and Riahi 11 proposed the artificial immune network algorithm to monitor the cavitation phenomenon in the centrifugal pump, and obtained the internal damage of the centrifugal pump by identifying the vibration and current signals.…”

Section: Introductionmentioning

confidence: 99%

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The influence of blade curvature radius on the internal unsteady characteristics of a centrifugal pump

Wang,

Liu,

Cao

2024

Energy Science & Engineering

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To study the influence of the blade curvature radius on the flow‐induced vibration and noise of the centrifugal pump, the internal sound field of the IS 80‐65‐160 centrifugal pump was numerically calculated by adjusting the blade wrap angles to change the blade curvature radius. The RNG (Reynolds Time Average Simulation) turbulence model was selected for the numerical calculation of the centrifugal pump. The numerical simulation of the whole flow channel of the centrifugal pump was carried out using Ansys Fluent software, and the external characteristic curve of the centrifugal pump was obtained. The influence of different blade wrap angles on the internal pressure, velocity and Turbulent Kinetic Energy of the centrifugal pump was obtained. On the basis of the sound–structure coupling equation, the unsteady sound field of the centrifugal pump was calculated, and the time domain and frequency domain characteristics of the pressure pulsation at each monitoring point were obtained. The calculation results showed that the dynamic and static interference between the impeller and the volute tongue mainly caused the vibration of the centrifugal pump. By appropriately increasing the blade wrap angles, the pressure pulsation in the volute fluid domain could be effectively reduced. The vibration and noise test bench of the centrifugal pump was set up to verify the test. The experimental results showed that at the double‐blade frequency, the variation trend of the experimental value and the simulated value of the outflow flow‐induced noise of the centrifugal pump were consistent, which verified the accuracy of the sound field simulation calculation. When the blade wrap angle , it could effectively reduce the internal sound pressure level and the flow‐induced vibration and noise of the centrifugal pump. By adopting measures such as grid encryption at the position of the tongue, nonstationary calculation and comparison of different turbulence models, the accuracy of the calculation results of the internal flow field and sound field of the centrifugal pump is effectively improved, and the accuracy and reliability of the experimental results are ensured. The above research results had certain reference significance and application value for improving the working efficiency of centrifugal pumps and reducing flow‐induced vibration and noise.

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Section: Turbulence Kinetic Energymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of blade curvature radius on the internal unsteady characteristics of a centrifugal pump

Wang,

Liu,

Cao

2024

Energy Science & Engineering

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“…18. We also use EEMD [40] and Spectral Kurtosis [41] (SK) to analyze the same signal for comparison. The signal is decomposed into 14 modes by EEMD, and subsequently the envelope spectra of the first six modes are displayed in Fig.…”

Section: A Weak Fault Identification Of a Machinery Fault Simulatormentioning

confidence: 99%

A Sensor-Based Modified FMD Method to Identify Fault Feature for Mechanical Fault Diagnosis of Ship-Borne Antennae

Zhou²,

Zhou

2023

IEEE Access

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It is necessary to perform condition monitoring and fault identification on ship-borne antennae to ensure navigation safety. However, timely fault identification of key parts in a complicated drivetrain of the ship-borne antenna is still a challenging task since fault features are usually modulated and inevitably submerged by heavy noise. Therefore, a new adaptive feature extraction method based on Feature Mode Decomposition (FMD) is proposed in this paper for diagnostic purpose. First, scale transform is applied on the spectrum of the monitoring signal to determine the parameters of FMD, including the number of FIR filters, the location of each filter and the order of the filter bank. Second, a modified feature mode decomposition (MFMD) algorithm is proposed to adaptively extract mono-component modes and combine similar modes for weak feature enhancement. Finally, the combined modes are analyzed for mechanical fault identification based on Hilbert demodulation. Two application cases show that the proposed method owns superior performance during feature extraction, compared with the traditional methods. INDEX TERMSMechanical fault diagnosis; Feature extraction; Feature Mode Decomposition; ship-borne antenna transmission system.

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“…Metodologi diterapkan dan dievaluasi pada sinyal getaran yang diperoleh dari dua impeler semiterbuka yang berbeda. Hasil di bawah kondisi kavitasi awal menunjukkan bahwa ledakan frekuensi tinggi gelembung uap berinteraksi dengan frekuensi rendah lewat dari pisau berputar dan membentuk bagian dari sinyal getaran [3]. Kavitasi adalah masalah penting yang terjadi di setiap pompa.…”

Section: Landasan Teori Pengujian Getaran Mesinunclassified

Pengaruh Putaran Poros Pada Pompa Sentrifugal Yang Disusun Paralel Terhadap Karakteristik Vibrasi

Sianturi

Naibaho

2022

JTM

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Pompa merupakan alat yang digunakan untuk mempercepat aliran fluida ketempat yang diperlukan. Pengaruh putaran pada pompa sangat memperngaruhi kecepatan laju aliran menghantarkan fluida tersebut ataupun melakukan daya hisap (suction). Metode penelitian ini dilakukan dengan memvariasi kecepatan putar pada pompa untuk mengetahui getaran yang terjadi akibat variasi putaran tersebut dari sis arah horizontal dan vertical. Hasil penelitian yang telah dilakukan, diperoleh beberapa hasil yang merupakan jawaban dari tujuan penelitian ini . Hasil penelitian yang dilaksanakan dapat disimpulkan sebagai berikut :Dari kedua posisi pengukuran diatas dapat disimpulkan bahwa hasil respon getaran maksimum yang paling rendah terdapat pada pompa di titik P-04 pada n = 500 rpm dengan harga simpangan 0,75 x 10-6 m arah horizontal sedangkan yang paling tinggi terdapat pada pompa dititik P-01 pada n = 500 rpm dengan harga simpangan 1,85x 10-6 m arah horizontal.Dari hasil pengukuran respon getaran yang diukur pada pompa, elektromtor , landasan dapat disimpulkan bahwa simpangan terbesar terjadi pada pompa di titik P-01 dengan harga simpangan 1,85 x 10-6 m arah horizontal, diikuti elektromotor di titik P-05 dengan harga simpangan 1,77 x 10-6 m arah vertikal kemudian landasan di titik P-06 dengan harga simpangan 1,66 x 10-6 m arah vertikal. Dari standart ISO 10816-3 untuk velocirty pada pompa dengan harga tertinggi vertikal 4,56 m/s di titk P-05 dikategorikan pada zona C berwarna kuning, getaran dari mesin dalam batas toleransi dan hanya dioperasikan dalam waktu terbatas, untuk arah horizontal harga tertinggi 4,37 m/s dititik P-02 dikategorikan pada zona B berwarna hijau muda, getaran dari mesin baik dan dapat dioperasikan tanpa larangan.

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Application of Spectral Kurtosis on vibration signals for the detection of cavitation in centrifugal pumps

Cited by 31 publications

References 50 publications

The influence of blade curvature radius on the internal unsteady characteristics of a centrifugal pump

The influence of blade curvature radius on the internal unsteady characteristics of a centrifugal pump

A Sensor-Based Modified FMD Method to Identify Fault Feature for Mechanical Fault Diagnosis of Ship-Borne Antennae

Pengaruh Putaran Poros Pada Pompa Sentrifugal Yang Disusun Paralel Terhadap Karakteristik Vibrasi

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