Straty ciśnienia przy przepływie mieszaniny gazowo - cieczowej w U-rurach

• Autorzy: Pietrzak M. , Witczak S.
• Języki publikacji: PL

Abstrakty

EN

This paper presents results of investigations relative of values of two-phase air-oil and air-water flow press losses. The investigations were conducted in horizontal U-pipe bend with the internal diameter 0.016 curvature radius 0.11 m and angle 180°. The machine oil Itherm 12 was used as the working fluid. The viscosity and density of oil were changed in range: ηa- (0.091-0.528) Pa s and Q0- (869.6-884.5) kg m-3. The range of superficial velocity of air νa,0 = (0.37-2.89) m s-1, of oil ,.ν0 = (0.014-O.047) m s- 1 and of water ν r0) - (0.035-0.25) m sA new correlation for two-phase flow pressure drop in 180° pipe bend is propc based a total of 124 experimental data points for air-oil and air-water flow. The correlation predicts all with a coefficient correlation R=0.972 and 82 % of the data fall within ± 30 % error bands.

Słowa kluczowe

PL

U-rurka; ciśnienie wody; mieszanina gazowo-cieczowa; straty ciśnienia

EN

U-pipe; flow pressure; mixture of gas-liquid; pressure losses

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Systems : journal of transdisciplinary systems science
• Rocznik: 2008
• Tom: Vol. 13, spec. iss. 2/2
• Strony: 84--90
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Pietrzak M.

• Politechnika Opolska, Katedra Inżynierii Procesowej, St. MIkołajczyka 5, 45-271 Opole

autor

Witczak S.

• Politechnika Opolska, Katedra Inżynierii Procesowej, St. MIkołajczyka 5, 45-271 Opole

Bibliografia

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• [3] CHEN I. Y., WU Y. S., CHANG Y. J., WANG C. C, Two-phase frictional pressure drop of R-134a and R-41 OA refrigerant-oil mixtures in straight tubes and U-type wavy tubes, Exp. Therm, and Fluid Science, 31, 2007,291-299.
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• [7] PALIWODA A., Generalized method of pressure drop calculation across pipe component containing two-phase flow ee refrigerants, Rev. Int. Froid, 15 (2), 1992, 120-126.
• [8] PIETRZAK M., WITCZAK S., Hydrodynamics of the gas-liquid flow in the pipe bend, Archives of Therm., Vol. 27, 2006, 227-234.
• [9] SUBBU S.K., DAS S.K., BISWAS M.N., MITRA A.K., Pressure drop in U-bends for air-water flow., Int. J. Eng. Fluid Mech., 3(3), 1990, 239-248.
• [10] YU Q. G., BARRIER D., COGNET G., Two-phase flow in horizontal and vertical C-types bend-Pressure and fraction distribution, European Two-Phase Flow Group Meeting, Paris