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

Pietrzak M., Witczak S.

Systems : journal of transdisciplinary systems science

2008

Vol. 13, spec. iss. 2/2

84--90

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.

Przyczyny zniszczenia U-rurek chłodnicy pary podgrzewacza niskoprężnego i proponowane środki zaradcze

Czyżowicz S., Miliński P.

Energetyka

1999

nr 8

378-383