Investigation of effect of pump rotational speed on performance and detection of cavitation within a centrifugal pump using vibration analysis

Abstract

Cavitation is an essential problem that occurs in any pump. It highly contributes to deteriorating the performance of the pump. In industrial applications, it is important to detect and decrease the effect of the cavitation in pumps. In this work, detecting and diagnosing the cavitation phenomenon within centrifugal pumps using vibration technique was investigated. The results obtained for vibration signal in both time and frequency domains were analysed in order to gain a better understanding about the detection of cavitation in the pumps in question. The effect of different operating conditions including various flow rates and pump rotational speeds related to the cavitation were measured. Different statistical features in time domain analysis (TDA) and also the Fast Fourier Transform (FFT) technique for frequency domain analysis (FDA) were applied.

A novel time–frequency–space method with parallel factor theory for big data analysis in condition monitoring of complex system

“…The process of a 3-D matrix low-rank decomposition is given and the rank of the 3-D matrix X is R. The 3-D matrix low-rank decomposition model given by equation (1) was named as the parallel factor model (PARAFAC) by Harshman, which was also known as the trilinear model. 36 X can be represented by a cube and the parallel factor model is shown in Figure 1 The A, B, and C are the three loading matrices of the parallel factor model.…”

Experimental Investigation of the Effect of Air Injection on Performance and Detection of Cavitation in the Centrifugal Pump Based on Vibration Technique

“…Study of cavitation connected to centrifugal pump appears highly complex due to its cause's reduction in efficiency, turbulent flow structure, vibration, noise, and erosion. In the current study, the focus is to detect cavitation under different operating conditions using vibration analysis technique, as it is the effective tool to investigate the occurrence of vapour bubble and flow pattern in the pump [13][14][15]. Zhang et al [16] studied the effect of slope volute for cavitation in centrifugal pump using vibration characteristics.…”

Investigation of the influence of various numbers of impeller blades on internal flow field analysis and the pressure pulsation of an axial pump based on transient flow behavior

“…For better understanding the flow field inside the pump, we should provide a good indication of the underlying physics to recognize the dynamic mechanisms through analyzing the flow field using unsteady flow to manipulate and enhance the design of the pump. Thus, it is crucial to analyze accurately the temporal organization and local spatial of the flow field 4,5 . Over a period of time, investigations on the axial flow pump have been performed by different researchers, such as the work done by Momosaki et al 6 , who numerically modeled the internal flow in an axial flow pump.…”