Measurement of velocity of gas/solid swirl flow using Electrical Capacitance Tomography and cross correlation technique

Saoud, Ayoub; Mosorov, Volodymyr; Grudzień, Krzysztof

doi:10.1016/j.flowmeasinst.2016.08.003

Cited by 45 publications

(22 citation statements)

References 17 publications

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“…The cross-correlation is commonly applied to detect the delay of a signal with a known or assumed waveform [ 4 , 5 , 6 , 26 , 27 , 28 , 29 , 30 ]. A common error of the cross-correlation is the detection of a secondary maximum instead of the real one [ 26 ].…”

Section: Methodsmentioning

confidence: 99%

“…However, HSC requires an optical access to a measurement volume, which is not always possible such as in the case of optically opaque pipes or fluids. Optical access is not required by electrical capacitance or conductance sensors [ 4 , 5 , 6 ] nor by the gamma-ray tomography [ 7 , 8 , 9 ]. However, their resolution does not allow for resolving each bubble in a bubbly flow.…”

Section: Introductionmentioning

confidence: 99%

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Ultrasound Pulse-Echo Coupled with a Tracking Technique for Simultaneous Measurement of Multiple Bubbles

Povolny

Kikura

Ihara

2018

Sensors

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Bubbly flows are commonly used in various applications and their measurement is an important research topic. The ultrasound pulse-echo technique allows for the detection of each bubble and the measurement of the position of its surface. However, so far it has been used only to measure single bubbles. This paper investigates whether the pulse-echo technique can be applied for measuring multiple bubbles concurrently. The ultrasonic transducer wavelength and diameter were selected based on expected bubble diameters so that each bubble produced a strong reflection. The pulse-echo was implemented to obtain good accuracy without sacrificing the signal processing speed. A tracking technique was developed for the purpose of connecting detected reflections to trajectories. The technique was tested experimentally by measuring the horizontal position of rising air bubbles in a water tank. The results show that the pulse-echo technique can detect multiple bubbles concurrently. The pulse-echo technique detected almost the same number of bubbles as a high-speed video. For average void fractions up to around 1% (and instantaneous void fraction reaching 5.3%), the rate of bubbles missed by the pulse-echo and the rate of noise trajectories both stayed less than 5%. The error rate increased with the void fraction, limiting the technique’s application range.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrasound Pulse-Echo Coupled with a Tracking Technique for Simultaneous Measurement of Multiple Bubbles

Povolny

Kikura

Ihara

2018

Sensors

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“…In order to check the proposed approach, it was applied on real data sets derived from the ECT system. The ECT system had specifically designed sensors, which comprises 16 measuring electrodes, organised in two layers of eight electrodes each made of copper with a thickness of 0.2 mm, width of 50 mm for each one, and height of 30 mm. The external screen is made of a copper sheet with a thickness of 0.5 mm connected to the grounding measurement system; insulation of the external screen is made of polyurethane foam dielectric (permittivity of 1.6), whilst the two internal screen boundaries made of copper tape have a thickness of 0.2 mm and height of 25 mm each.…”

Section: Methods Validationmentioning

confidence: 99%

“…Recently, the method for angular velocity measurements in a case of a swirl flow was published . It is based on statistical spatio‐temporal analysis of tomographic images, captured by a twin‐plane tomography system.…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6] Recently, the method for angular velocity measurements in a case of a swirl flow was published. 7 It is based on statistical spatio-temporal analysis of tomographic images, captured by a twin-plane tomography system. The material propagation along the axial direction of the pipe from the plane X to plane Y is considered as a rotated process.…”

Section: Introductionmentioning

confidence: 99%

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Estimation of the rotation angle of gas/solid swirl flow by subpixel image resizing

Mosorov

Sankowski

2018

Asia-Pacific J Chem Eng

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An original approach for higher accuracy estimation of the rotation angle of swirl flows based on low‐resolution images delivered by an industrial tomography system is proposed. The approach utilises artificial increasing of resolution of tomographic images, that is, image resizing. It is shown that the proposed approach can be successfully applied for low‐quality reconstructed images, and it gives at least 20% improvement of accuracy.

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Investigation of Solid Velocity Measurement Using Single-Plane Versus Dual-Plane of Electrical Capacitance Tomography for Coal Power Plant Application

Hamzah

Wahab

Rahim

et al. 2022

Lecture Notes in Electrical Engineering

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Measurement of velocity of gas/solid swirl flow using Electrical Capacitance Tomography and cross correlation technique

Cited by 45 publications

References 17 publications

Ultrasound Pulse-Echo Coupled with a Tracking Technique for Simultaneous Measurement of Multiple Bubbles

Ultrasound Pulse-Echo Coupled with a Tracking Technique for Simultaneous Measurement of Multiple Bubbles

Estimation of the rotation angle of gas/solid swirl flow by subpixel image resizing

Investigation of Solid Velocity Measurement Using Single-Plane Versus Dual-Plane of Electrical Capacitance Tomography for Coal Power Plant Application

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