Vibration analysis for fouling detection using hammer impact test and finite element simulation

Silva, J.J.; Queiroz, I.B.; Lima, A.M.N.; Neff, Franz Helmut; Neto, José Sérgio da Rocha

doi:10.1109/imtc.2008.4547114

Cited by 5 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fouling causes non-stationary distortion which can be detected using wavelet transform for analysis [21]. Tubes became nonhomogeneous due to fouling which caused a decrease in energy spectrum due to signal leakage into the fouling layer.…”

Section: Acoustic Methodsmentioning

confidence: 99%

A5.4 - Clean or not clean - Detecting fouling in heat exchangers

Wallhäußer¹,

Hussein²,

Becker³

2013

Proceedings SENSOR 2013

View full text Add to dashboard Cite

Section: Acoustic Methodsmentioning

confidence: 99%

A5.4 - Clean or not clean - Detecting fouling in heat exchangers

Wallhäußer¹,

Hussein²,

Becker³

2013

Proceedings SENSOR 2013

View full text Add to dashboard Cite

“…UGW was also used to detect fouling in a duct using the acoustic hammer technique [ 20 , 21 , 22 ] and an ultrasonic transducer wedge at 500 kHz [ 21 ]; however, the research focused on signal processing aspects of the received signal to detect fouling. The application of acoustic hammer is inadvisable for industry use as the hammer impact may be inconsistent and may vary in amplitude, resulting in difficulties of comparison between the amplitude changes due to the accumulation of fouling and those due to the impact of the hammer itself.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Characterization of the Use of Low Frequency Ultrasonic Guided Waves to Detect Fouling Deposition in Pipelines

Lais

Lowe

Gan

et al. 2018

Sensors

View full text Add to dashboard Cite

The accumulation of fouling within a structure is a well-known and costly problem across many industries. The build-up is dependent on the environmental conditions surrounding the fouled structure. Many attempts have been made to detect fouling accumulation in critical engineering structures and to optimize the application of power ultrasonic fouling removal procedures, i.e., flow monitoring, ultrasonic guided waves and thermal imaging. In recent years, the use of ultrasonic guided waves has been identified as a promising technology to detect fouling deposition/growth. This technology also has the capability to assess structural health; an added value to the industry. The use of ultrasonic guided waves for structural health monitoring is established but fouling detection using ultrasonic guided waves is still in its infancy. The present study focuses on the characterization of fouling detection using ultrasonic guided waves. A 6.2-m long 6-inch schedule 40 carbon steel pipe has been used to study the effect of (Calcite) fouling on ultrasonic guided wave propagation within the structure. Parameters considered include frequency selection, number of cycles and dispersion at incremental fouling thickness. According to the studied conditions, a 0.5 dB/m drop in signal amplitude occurs for a fouling deposition of 1 mm. The findings demonstrate the potential to detect fouling build-up in lengthy pipes and to quantify its thickness by the reduction in amplitude found from further numerical investigation. This variable can be exploited to optimize the power ultrasonic fouling removal procedure.

show abstract

“…The proposed method could detect the inner pipe layer formation, and thickness estimation of the adsorbed material. Then, Silva [9]- [11] analyzed the vibration signals in presence of an inner pipe fouling layer using an accelerometer and a microphone for detection. The paper outlined the experimental setup, achievable sensitivities and limitations of the method.…”

Section: Related Workmentioning

confidence: 99%

Impact of Fouling on Flow-Induced Vibration Characteristics in Fluid-Conveying Pipelines

et al. 2016

View full text Add to dashboard Cite

This paper has addressed the common monitoring problems in petrochemical companies, which are caused by fouling and clogging in the circulating water heat exchangers, and has introduced techniques to monitor the heat exchanger's wall vibrations for early failure detection. Due to the difficulties encountered in simulation caused by the large number of tubes inside the heat exchanger, such monitoring methods are discussed by studying the fouling of a fluid-conveying pipeline. ANSYS was used to establish the normal and fouling models of a fluid-conveying pipeline so as to analyze the changing rules of various parameters that are influenced by different inlet velocities. These parameters include flow velocity, direction, pipeline wall load, wall displacement, and the acceleration of fluid domain in a fluid-conveying pipeline. It is shown that, as the inlet velocity and fouling severity continuously increase, the wall load and the vibration acceleration increase as well, leading variations in wall vibration signals. This paper conducts extensive experiments by using straight pipes to compare the results from simulation with those from the normal fluid-conveying pipelines under the same working conditions. By such comparison, the efficacy of the simulation model has been demonstrated.INDEX TERMS Fluid-conveying pipelines, fouling impact, vibration characteristics, vibration signals.

show abstract

Vibration analysis for fouling detection using hammer impact test and finite element simulation

Cited by 5 publications

References 11 publications

A5.4 - Clean or not clean - Detecting fouling in heat exchangers

A5.4 - Clean or not clean - Detecting fouling in heat exchangers

Characterization of the Use of Low Frequency Ultrasonic Guided Waves to Detect Fouling Deposition in Pipelines

Impact of Fouling on Flow-Induced Vibration Characteristics in Fluid-Conveying Pipelines

Contact Info

Product

Resources

About