Radioisotope investigations of compound two-phase flows in an open channel

Zych, Marcin; Petryka, Leszek; Kępiński, Jan; Hanus, Robert; Bujak, Tadeusz; Puskarczyk, Edyta

doi:10.1016/j.flowmeasinst.2013.10.001

Cited by 48 publications

(33 citation statements)

References 12 publications

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“…, (10) where u(L) is the standard uncertainty of the distance between detectors. Results of the average velocity ȣ S and its combined uncertainty u c (ȣ S ) [30] obtained in the WRQ051 experiment by use phase and CCF methods are presented in the table 2.…”

Section: Exemplary Resultsmentioning

confidence: 99%

Application of the phase method in radioisotope measurements of the liquid - solid particles flow in the vertical pipeline

Hanus

Zych

Petryka

et al. 2015

EPJ Web of Conferences

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Abstract. The paper presents idea and an application of the gamma-absorption method to a two-phase flow investigation in a vertical pipeline, where the flow of solid particles transported by water was examined by a set of two 241 Am radioactive sources and probes with NaI(Tl) scintillation crystals. In the described experiments as solid phase the ceramic models representing natural polymetallic ocean nodules were used. For advanced analysis of electrical signals obtained from detectors the phase of cross-spectral density function has been applied. Results of the average solid-phase velocity measurements were compared with one obtained by application of the classical cross-correlation. It was found that the combined uncertainties of the velocity of solid particles evaluation in the presented experiment did not exceed 0.6% in phase method and 3.2% in crosscorrelation method.

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Section: Exemplary Resultsmentioning

confidence: 99%

Application of the phase method in radioisotope measurements of the liquid - solid particles flow in the vertical pipeline

Hanus

Zych

Petryka

et al. 2015

EPJ Web of Conferences

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“…Shown in Table 1, the length l n of large structures was calculated according to the formula (3) and the depth d n from the formula (5). In contrast, the average length l of a large bubble for the whole measurement time of 480 s was calculated from the formula (4), and the depth d from equation (6).…”

Section: Analysis Of Time and Frequency Signalsmentioning

confidence: 99%

“…The measuring system proposed in this article is a set of measurement devices based on the absorption of gamma radiation, which is being perfected by the authors for many years [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the structures size in the liquid-gas flow by gamma-ray absorption

et al. 2018

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Abstract. The rapid development of tomography methods particularly electrical, X and gamma rays allows for a wide range of the information about flow structure. However, all of such methods are quite complicated. At the same time much simpler systems as the measuring system of gamma rays absorption, allows to obtain a all key flow information which describe the two-phase flow. In the article the results of analyzes of radiometric signal that not only allow to recognize the type of flow, but also the assessment of forming structures are presented. Calculation and interpretation of the data were based on the crosscorrelation and cross-spectral density function. In order to verify the calculations the photographic documentation made during the measurements was used.

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“…The simplistic schema of the stand is shown in Figure 1. to which water is pumped by a rotary pump (4) and air from the compressor (5) by an injector nozzle (7). Due to that the controlled mixture of water and air supply the measuring pipe and flowing up to the air-removing tank (6).…”

Section: Laboratory Standmentioning

confidence: 99%

“…The latter one are also used by the authors of this article in studies of gas-liquid and liquid-solids flows [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Application of spectral analysis in radiometric measurements of twophase liquid-gas flow

Zych

Hanus

Petryka

2014

MATEC Web of Conferences

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Abstract. This article presents use of the classical spectral analysis to identify a type of flow in investigation of gas transportation by liquid with a measurement of gamma radiation absorption. During numerous experiments it was found that a magnitude of the cross-spectral density distribution of recording signals reveals type of air-water mixture flow in a horizontal pipeline. As an example, some results of laboratory measurements equipped in 241 Am radiation source and scintillation probes with of NaI(Tl) crystals are presented. Moreover attached figures facilitate interpretation of observed results and in details illustrating the proposed method.

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Radioisotope investigations of compound two-phase flows in an open channel

Cited by 48 publications

References 12 publications

Application of the phase method in radioisotope measurements of the liquid - solid particles flow in the vertical pipeline

Application of the phase method in radioisotope measurements of the liquid - solid particles flow in the vertical pipeline

Evaluation of the structures size in the liquid-gas flow by gamma-ray absorption

Application of spectral analysis in radiometric measurements of twophase liquid-gas flow

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