A new approach to detection of vortices using ultrasound

Music, Mustafa; Ahić-Džokić, M.; Džemić, Zijad

doi:10.1016/j.flowmeasinst.2015.01.001

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…Multiple methods (including ultrasonic sensors, pressure sensors, and capacitive sensors) have been used to identify vortices after the bluff body. Musić et al used two pairs of ultrasonic transducers to identify vortices. Unlike traditional methods, their method was capable of reducing or eliminating noise, increasing sensitivity of sensors (which allowed the application of a smaller bluff body, thereby reducing the pressure drop in the flowmeter), and decreasing measurement uncertainty.…”

Section: Introductionmentioning

confidence: 99%

A novel technique for solid mass loading measurement in dilute gas–solid two‐phase flow by vortex flow meter based on vortex shedding principles

Shirvani

Hashemabadi

2019

Asia-Pacific J Chem Eng

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Vortex flowmeter has broad applications in industrial single-phase flow problems. There is experimental evidence suggesting that the presence of particles in gas-solid flows may cause a modulation in the turbulence intensity of the carrier phase. Using vortex flowmeter, one may manipulate vortex shedding generated by a bluff body and, therefore, change pressure fluctuation after bluff body and pressure drop between two sides of the vortex shedder. In this research, a vortex flowmeter with a differential pressure sensor was used to experimentally measure solid mass loading in a dilute gas-solid two-phase flow. The results indicated that the average bluff body pressure drop in gas-solid flows is always more than that occurring in gas flows, and the presence of particles can both attenuate and augment vortex shedding frequency. The results also showed that one can obtain the solid mass loading by means of pressure drop signals with a maximum relative error of 5%, which may be advantageous for industrial process measurement.KEYWORDS differential pressure, dilute gas-solid two-phase flow, solid mass loading measurement, vortex flowmeter

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Section: Introductionmentioning

confidence: 99%

A novel technique for solid mass loading measurement in dilute gas–solid two‐phase flow by vortex flow meter based on vortex shedding principles

Shirvani

Hashemabadi

2019

Asia-Pacific J Chem Eng

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“…Another important aspect is the accurate measurement of gas flow where the accuracy of a measurement method is described by trueness and precision [1]. The accurate measurement is an essential requirement given in Directives [2][3][4] and relevant for many applications. There are many issues affecting the accuracy of measurement, such as: comparability of measurement results of gas quantities of considerable values, demanding and sometimes not realistic requirements Article history: received on Oct. 10, 2018; accepted on Dec. 29, 2018; available online on Jun.…”

Section: Introductionmentioning

confidence: 99%

“…However, additional considerable research is still necessary in order to improve the relevance of these documents in real-life applications regarding scientific, industrial and legal metrology aspects. The existing deficiency becomes obvious when certain assumptions or requirements of the written standards [7] and regulations [8][9][10] are analysed and compared taking into account feasible and realistic needs [4]. What can be done in such situations?…”

Section: Introductionmentioning

confidence: 99%

Metrology and Measurement Systems

Džemić¹,

Širok²,

Drnovšek³

2019

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The objective of the paper is to analyse traceability issues in real-life gas flow measurements in complex distribution systems. The initial aim is to provide complete and traceable measurement results and calibration certificates of gas-flow meters, which correspond to specific installation conditions. Extensive work has been done to enable a more credible decision on how to deal in particular situations with the measurement uncertainty which is always subject of a flow meter's calibration as a quantitative parameter value obtained in laboratory, and with the qualitative statement about the error of an outdoor meter. The laboratory simulation of a complex, real-life distributed system has been designed to achieve the initial aim. As an extension of standardized procedures that refer to the laboratory conditions, the proposed methods introduce additional "installation-specific" error sources. These sources could be either corrected (if identified) or considered as an additional "installation-specific" uncertainty contribution otherwise. The analysis and the results of the experimental work will contribute to more precise and accurate measurement results, thus assuring proper measurements with a known/estimated uncertainty for a specific gas flow installation. Also, the analysis will improve the existing normative documents by here presented findings, as well as fair trade in one of the most important and growing energy consumption areas regarding the legal metrology aspects. These facts will enable comparing the entire quantity of gas at the input of a complex distributed system with the cumulative sum of all individual gas meters in a specific installation.

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“…When a steam boiler heats the water, bubbles breaking through the water surface will pull tiny water droplets in with the steam, causing the steam supply to become partially wet (wet steam) from the added liquid, affecting the quality of the steam. 3,4 The measurement of the dryness fraction of the stream indicates the overall efficiency. 5 Due to the need for more straightforward, rapid, and costeffective methods, integration of automatic analysis technology and traditional detection methods with the routine analysis.…”

mentioning

confidence: 99%

An Online Fully-Automatic High Precision Monitoring System of Steam Dryness Based on Spectral Absorption Characteristics

Chen¹,

Wang²,

Zhang³

et al. 2022

J. Electrochem. Soc.

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Steam dryness detection is crucial in the field of oil exploitation. Steam dryness too high will be dangerous, whereas steam dryness too low will affect the efficiency of extraction. Therefore, real-time, high-precision detection of steam dryness is essential. The methods for detecting steam dryness include chemical, thermodynamic, radiometric, and microwave. The manual test method possesses the best detection accuracy. However, the real-time performance is not good, and the detection process is cumbersome. Here we propose using a silver nitrate solution to titrate chloride ions and combining them with the change in the absorbance of the solution to determine the endpoint of the titration. We report that the automatic chloride ion concentration measurement was a rep and that the detection of chloride ion concentration was 15 mg/L. The detection linearity reached 0.992. Therefore, our titration endpoint judgment method has better anti-interference.

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A new approach to detection of vortices using ultrasound

Cited by 6 publications

References 21 publications

A novel technique for solid mass loading measurement in dilute gas–solid two‐phase flow by vortex flow meter based on vortex shedding principles

A novel technique for solid mass loading measurement in dilute gas–solid two‐phase flow by vortex flow meter based on vortex shedding principles

Metrology and Measurement Systems

An Online Fully-Automatic High Precision Monitoring System of Steam Dryness Based on Spectral Absorption Characteristics

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