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Generator minipęcherzy w minikanale

Górski G., Mosdorf R.

Aparatura Badawcza i Dydaktyczna

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2015

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T. 20, nr 2

146-156

PL

W pracy przeprowadzono analizę porównawczą rozwiązań konstrukcyjnych mieszalników fazy ciekłej z fazą gazową. Pokazano, że w zaproponowanych rozwiązaniach trudno jest sterować ilością pęcherzy w podłączonym do nich minikanale, a tym samym niemożliwe jest uzyskanie wszystkich rodzajów przepływu dwufazowego. W pracy przedstawiono własną koncepcję generatora mini i mikropęcherzy, który pozwala na formowanie oczekiwanej struktury przepływu dwufazowego w minikanale. Generator wykorzystano do wytworzenia minipęcherzy w minikanale. Urządzenie testowano dla czterech różnych przewodów o średnicach wewnętrznych: 1, 2, 4, 5 mm. We wszystkich przypadkach generator tworzył pęcherze o różnych średnicach.

EN

The gas-liquid mixers construction were compared in this paper. New conception of mini and micro bubbles generator is presented. The generator is used to form of mini bubbles in mini channel. The testing was conducted in tubes with the internal diameters of 1, 2, 4 and 5 mm. The different diameters of bubbles were formed for each generator constructions.

2

Koncepcja badań przepływu dwufazowego w minikanale z elementami zaburzającymi

Wacławczyk A.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

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2014

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z. 104

225-228

EN

Dynamic technological progress requires from industry new types of devices. These are generally compact appliances, which basic advantage apart from its small size would be conduct of high performance. This is why it is so important to study two-phase flow in mini channels. Physical phenomena observed during flow in mini channels with disrupting elements require detailed analysis.

3

Koncepcja badań eksperymentalnych wpływu struktur przepływu na opory przepływu mieszaniny dwufazowej gaz-ciecz w minikanałach

Wacławczyk P.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

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2014

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z. 104

229-232

EN

Currently smaller and smaller channels are used to construct many devices such as mini heat exchangers or mini reactors. Therefore, predicting of two-phase flow pressure drops along minichannels is very important for proper and safely operation of these appliances. Because of this fact, it was decided to carried out introductory research of flow patterns influence on pressure drops in the two-phase flow mixture.

4

Experimental investigation of the two-phase flow regimes and pressure drop in horizontal mini-size rectangular test section

Elazhary A., Soliman H.

Archives of Thermodynamics

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2012

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Vol. 33, no. 2

47-6

EN

An experimental study was conducted in order to investigate two-phase flow regimes and fully developed pressure drop in a mini-size, horizontal rectangular channel. The test section was machined in the form of an impacting tee junction in an acrylic block (in order to facilitate visualization) with a rectangular cross-section of 1.87-mm height on 20-mm width on the inlet and outlet sides. Pressure drop measurement and flow regime identification were performed on all three sides of the junction. Air-water mixtures at 200 kPa (abs) and room temperature were used as the test fluids. Four flow regimes were identified visually: bubbly, plug, churn, and annular over the ranges of gas and liquid superficial velocities of 0.04 [ less than or equal to] JG [ less than or equal to] 10 m/s and 0.02 [ less than or equal to] JL [ less than or equal to] 0.7 m/s, respectively, and a flow regime map was developed. Accuracy of the pressure-measurement technique was validated with single-phase, laminar and turbulent, fully developed data. Two-phase experiments were conducted for eight different inlet conditions and various mass splits at the junction. Comparisons were conducted between the present data and former correlations for the fully developed two-phase pressure drop in rectangular channels with similar sizes. Wide deviations were found among these correlations, and the correlations that agreed best with the present data were identified.