Analysis of Pressure Fluctuations in Two-phase Vertical Flow in Annulus

W. Jaewoo Shim; Chul Hee Jo

Journal of Industrial and Engineering Chemistry, Vol.6, No.3, 167-173, May, 2000

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Analysis of Pressure Fluctuations in Two-phase Vertical Flow in Annulus

W. Jaewoo Shim^†, and Chul Hee Jo¹

Department of Chemical Engineering, College of Engineering, Dankook University, Seoul 140-714, Korea
¹Department of Naval Architecture and Ocean Engineering, College of Engineering, Inha University, Inchon 402-751, Korea

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The pressure fluctuations of the two-phase, air-water, vertical flow in an annulus were examined for nominal water flow rates of 6.81∼15.89 ㎥/h (cubic meter per hour) and air flow rates of 0∼47.57 standard ㎥/h (standard cubic meter per hour). A power spectral density (PSD) and a probability density function (PDF) analyses of the differential pressure fluctuations in the vertical upward flow case showed that the PDF results were able to characterize three types of flow patterns, namely, bubble, churn, and slug flows at a nominal water flow rate of 6.81㎥/h. At higher water flow rates, only the bubble flow was distinguished.

Keywords:two-phase flow;fressure fluctuations;flow pattern;annulus

[References]

Mandhane JM, Gregory GA, Aziz K, Int. J. Multiph. Flow, 1, 537 (1974)
Golan LP, Stenning AH, Two-phase Vertical Flow Maps. Proc. Inst. of Mech. Engrs., 184, 105 (1969)
Oshinowo T, Charles ME, Can. J. Chem., 52, 25 (1974)
Taitel Y, Barnea D, Dukler AE, AIChE J., 26, 345 (1980)
Shim WJ, J. Ind. Eng. Chem., 3(3), 210 (1997)
Jones OC, Zuber N, Int. J. Multiph. Flow, 2, 273 (1975)
Brauner D, Shaham O, Taitel Y, Int. J. Multiph. Flow, 6, 387 (1980)
Matsui G, Nucl. Eng. Design, 95, 221 (1986)
Tutu NK, Int. J. Multiph. Flow, 10, 211 (1984)
Das RK, Pattanayak S, Meas. Sci. Technol., 4, 1457 (1993)
Leblond J, Javelot S, Lebrun D, Lebon L, Nucl. Eng. Design, 184, 229 (1998)
Soldati A, Paglianti A, Giona M, Exp. Fluids, 21, 151 (1996)
Press WH, Flannery BP, Teukolsky SA, Vetterling WT, Numerical Recipes in C, pp. 309-440, Cambridge University Press (1988)

[1] Mandhane JM, Gregory GA, Aziz K, Int. J. Multiph. Flow, 1, 537 (1974)

[2] Golan LP, Stenning AH, Two-phase Vertical Flow Maps. Proc. Inst. of Mech. Engrs., 184, 105 (1969)

[3] Oshinowo T, Charles ME, Can. J. Chem., 52, 25 (1974)

[4] Taitel Y, Barnea D, Dukler AE, AIChE J., 26, 345 (1980)

[5] Shim WJ, J. Ind. Eng. Chem., 3(3), 210 (1997)

[6] Jones OC, Zuber N, Int. J. Multiph. Flow, 2, 273 (1975)

[7] Brauner D, Shaham O, Taitel Y, Int. J. Multiph. Flow, 6, 387 (1980)

[8] Matsui G, Nucl. Eng. Design, 95, 221 (1986)

[9] Tutu NK, Int. J. Multiph. Flow, 10, 211 (1984)

[10] Das RK, Pattanayak S, Meas. Sci. Technol., 4, 1457 (1993)

[11] Leblond J, Javelot S, Lebrun D, Lebon L, Nucl. Eng. Design, 184, 229 (1998)

[12] Soldati A, Paglianti A, Giona M, Exp. Fluids, 21, 151 (1996)

[13] Press WH, Flannery BP, Teukolsky SA, Vetterling WT, Numerical Recipes in C, pp. 309-440, Cambridge University Press (1988)