Journal ArticleDOI
The use of noise and vibration signals for detecting cavitation in kinetic pumps
Jan Černetič
- Vol. 223, Iss: 7, pp 1645-1655
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TLDR
In this article, the authors deal with signals of vibration and noise, which will be used for detection and monitoring of the cavitation in kinetic pumps, and also to prevent the effect of the Cavitation in the pump and pumping system.Abstract:
Cavitation in a kinetic pump reduces delivery head and efficiency of the pump. It also causes mechanical damage and an increase of vibrations and noise. Therefore, it is important to detect inception and development of a cavitation phenomenon in the pump. This article deals with signals of vibration and noise, which will be used for detection and monitoring of the cavitation in kinetic pumps, and also to prevent the effect of the cavitation in the pump and pumping system. When the cavitation is increasing, the flowing conditions are changing, which leads to an increase of vibrations of the pump and emitted noise in the surroundings. Because vibrations and noise are transferred from the pump through its casing, the signal is non-uniformly distorted due to transfer losses and structure of the casing surfaces. Noise and vibrations are increasing steadily, but in some specific frequency ranges the signal is more pronounced than in other parts of the spectrum. Experimental results have shown that vibra...read more
Citations
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Journal ArticleDOI
Research on vibration suppression method of alternating current motor based on fractional order control strategy
TL;DR: The proposed vibration suppression method based on fractional order Proportional-Integral-Derivative (PID) controller has the characteristics of multi-point control by comparing with the integer order PID controller and can better suppress the vibration of alternating current motor.
Journal ArticleDOI
An experimental study on the cavitation vibration characteristics of a centrifugal pump at normal flow rate
TL;DR: An ameliorative algorithm-united algorithm for cavitation vibration analysis is proposed on the basis of short time Fourier transform (STFT) and Wigner-Ville distribution (WVD) as discussed by the authors.
Journal ArticleDOI
Internal flow structure, fault detection, and performance optimization of centrifugal pumps
TL;DR: This review mainly summarizes the latest developments in the internal flow field and external characteristics of centrifugal pumps focused on turbulence and cavitation models, flow visualization methods, and fault detection based on noise and vibration.
Journal ArticleDOI
Estimating uncertainty of measurements for cavitation detection in a centrifugal pump
Jan Černetič,Mirko Čudina +1 more
TL;DR: In this paper, the authors deal with estimation of a measurement uncertainty for different kinds of measurement ways to detect the cavitation in a centrifugal pump with noise and vibration signal in audible frequency range from 20 Hz to 20 kHz.
Journal ArticleDOI
Numerical and experimental investigation on the development of cavitation in a centrifugal pump
TL;DR: The research reveals the occurrence and development of cavitation in the centrifugal pump which has been confirmed through experiments and numerical simulation, and the typical frequency of pump inlet pressure pulsation could be regarded as around 30 Hz in the severe cavitation conditions.
References
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Book
Cavitation and Bubble Dynamics
TL;DR: In this paper, the fundamental physical processes involved in bubble dynamics and the phenomenon of cavitation are described and explained, and a review of the free streamline methods used to treat separated cavity flows with large attached cavities is provided.
Journal ArticleDOI
Detection of cavitation in hydraulic turbines
TL;DR: In this article, an experimental investigation has been carried out in order to evaluate the detection of cavitation in actual hydraulic turbines, based on the analysis of structural vibrations, acoustic emissions and hydrodynamic pressures measured in the machine.
Journal ArticleDOI
Detection of cavitation phenomenon in a centrifugal pump using audible sound
TL;DR: In this article, the authors have shown that there is a discrete frequency tone within the audible noise spectra, at 147 Hz or BPF/2, which is strongly dependent on the cavitation process and its development.
BookDOI
Cavitation of hydraulic machinery
TL;DR: Li et al. as mentioned in this paper investigated the role of machine transients in the formation of single and multi-bubbles in Hydraulic Machinery, and found that the most frequent types of machine-transients are pump and pump transients.
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