Cavitation Detection of a Centrifugal Pump Using Instantanous Angular Speed

Al-Hashmi, Salem. A.; Gu, Fengshou; Li, Yuhua; Ball, Andrew; Fang, Tao; Liu, Ke

doi:10.1115/esda2004-58255

Cited by 13 publications

(9 citation statements)

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“…In his article, Dauglas attempted to combine the analysis of instantaneous rotational speed with vibroacoustic methods [46]. Also, research of other than diesel engines machines based on instantaneous rotational speed has been conducted [47,48].…”

Section: State-of-the-artmentioning

confidence: 99%

Instantaneous Rotational Speed Algorithm for Locating Malfunctions in Marine Diesel Engines

Kazienko

Chybowski

2020

Energies

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This article suggested broadening the standard methods for diagnosing the technical condition of diesel engines to include an analysis of the instantaneous rotational speed of compression combustion engines with the use of a novel algorithm. The authors revised the subject concerning the use of the analysis of instantaneous changes in the rotational speed of an engine when assessing its technical condition and the location of the malfunction. An algorithm and its practical implementation in a prototype diagnostic system called SpeedMA were presented. This article reported the test results of the prototype in the context of indicating the engine cylinder in which ignition failed to occur. Tests were carried out for two marine engines: a low-speed trunk engine directly driving the fixed-pitch propeller and a medium-speed trunk engine driving the alternator. For each case, an analysis was carried out for different engine loads and at individual cylinders in which combustion failed to occur. The experimental results showed an unambiguous relation between the combustion process of the examined engines and changes in the instantaneous rotational speed. The results also confirmed the usefulness of the proposed method and showed the correct operation of the presented diagnostic algorithm. The proposed diagnostic system could be used during the operation of engines running in real ship engine rooms.

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Section: State-of-the-artmentioning

confidence: 99%

Instantaneous Rotational Speed Algorithm for Locating Malfunctions in Marine Diesel Engines

Kazienko

Chybowski

2020

Energies

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“…And the power of the encoder is supplied by direct-current power source shown in Figure 10. 19 Experimental results and signal pre-processing…”

Section: Experiments and Data Acquisitionmentioning

confidence: 99%

“…From equation (19), it can be seen that marginal spectrum is the time integral of Hilbert spectrum. The y-coordinate of the marginal spectrum represents for the energy of all the time at a certain frequency.…”

Section: Time-frequency Characteristics Analysis Of Current Signalmentioning

confidence: 99%

Unsteady characteristics analysis of centrifugal pump operation based on motor stator current

Sun

Yuan

Luo

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part A:

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Motor current signature analysis technology is a cost-effective, non-intrusive and reliable technique used for monitoring of motor-driven devices. In this method, the motor is regarded as a torque sensor. Theoretical analysis, numerical simulation, and experiment were conducted to do research on time–frequency analysis of current signature for unsteady characteristic extraction of pump operation. Results show that most energy of current is concentrated on the first order of Intrinsic Mode Function (IMF) component. Torque related oscillation could be reflected by energy amplitude and its variation. The root mean square and kurtosis value of transient energy in Hilbert spectrum could be regarded as the indicators of centrifugal pump operation point detection. Hilbert marginal spectrum could depict the stability of centrifugal pump operation and suggest the proper operation points to ensure high efficiency and reliability.

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“…When a centrifugal pump handles liquids with different viscosity and specifications, there Net Positive Suction Head (NPSH) normally will be different. The simple definition of the NPSHA is the difference between pressure at the suction of the pump and the vapour pressure for the liquid being pumped [1]. An increase or decrease of NPSH will result in cavitation taking place in the pump.…”

Section: Introductionmentioning

confidence: 99%

Effects of Different Fluids Properties on Cavitation Performance in Centrifugal Pump

Ghidhan¹,

Hamed²,

Benaros³

2018

Proceedings of First Conference for Engineering Sciences and Technology: Vol. 2

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Cavitation, which is the formation and collapse of vaporous cavities in flowing liquids, can degrade the performance of pumps and other hydraulic equipment. The aims of the present research are to investigate the effect of different fluids properties on pump cavitation performance. Consideration is given to examine the effect of liquid viscosity and density on cavitation behavior. Experimental results are presented for a centrifugal pump operating in water, kerosene and diesel fuel with different disposal rates of flow. With references to the results, the water has affected by the cavitation at less Net Positive Suction Head (NPSH) than other liquids, also it can be conducted that the kerosene shares the closest cavitation behavior with diesel fuel. Therefore, the stress produced by cavitation bubbles decreases with increase of viscosity of the liquid.

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Cavitation Detection of a Centrifugal Pump Using Instantanous Angular Speed

Cited by 13 publications

References 0 publications

Instantaneous Rotational Speed Algorithm for Locating Malfunctions in Marine Diesel Engines

Instantaneous Rotational Speed Algorithm for Locating Malfunctions in Marine Diesel Engines

Unsteady characteristics analysis of centrifugal pump operation based on motor stator current

Effects of Different Fluids Properties on Cavitation Performance in Centrifugal Pump

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