Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 6

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: pipe bend

Sortuj według:

Ogranicz wyniki do:

Mechanisms Of Erosion Wear In Pipes Caused By A Stream Of Solid Particles

100%

Krupicz B.

Journal of Polish CIMAC

2007

tom Vol. 2, no 2

291-296

In the paper an analysis of pipe bend erosion was conducted. This erosion was compared to the erosion of flat samples. The function of particle velocity change: v/vo=e-af was assessed and contact stress caused by the centrifugal force of inertia of solid particles (diameter d < 0,1 mm) in the bend material was calculated.

Hydrodynamics of the gas-liquid flow in the pipe bend

75%

Witczak S. , Pietrzak M.

Archives of Thermodynamics

2006

tom Vol. 27, no. 4

227-234

This paper presents two phase air-oil flow in pipe bend with tube inside diameter D = 0.016 m, curvature radius R = 0.11 in and angle 0 = 180[degrees]. The mixture of gas-liquid flowed upwards and downwards across the bend. In the paper upflow and downflow in pipe bend are compared. As a result, flow patterns formed in pipe bend are determined as well as determined void fractions of gas phase.

Erosion of the pipe bend in the jet of solid particles

75%

Krupicz B.

Tribologia

2002

tom nr 5

1437-1444

In the paper an analysis of pipe bend erosion was conducted. This erosion was compared to the erosion of flat samples. The function of particle velocity change: v/v(o) = e(-alpha f) was assessed and contact stress caused by the centrifugal force of inertia in the bend material was calculated.

W pracy przeprowadzono analizę erozji łuku rurociągu. Erozję łuku porównano z erozją płaskich próbek. Ustalono funkcję v/v(o) = e(-alfa f) zmiany prędkości cząstek i obliczono naprężenie kontaktowe w materiale łuku wywołane odśrodkową siłą bezwładności.

Przepływ dwufazowy gaz - ciecz w kanale łukowym

63%

Pietrzyk M. , Witczak S.

Inżynieria i Aparatura Chemiczna

2006

tom Nr 6s

192-193

The analysis and test results of hydrodynamics of two-phase gas - liquid flow in a pipe bend is presented in the paper. Types of flow patterns formed in a pipe bend and values of void fractions in phases were determined.

Struktury przepływu trójfazowego gaz - ciecz - ciecz w łuku rurowym

63%

Pietrzak M. , Witczak S.

Inżynieria i Aparatura Chemiczna

2009

tom Nr 6

148-149

W pracy przedstawiono wyniki badań dotyczących obserwacji struktur przepływu, jak również pomiarów udziałów objętościowych faz przy przepływie mieszaniny trójfazowej powietrze — woda — olej przez łuk rurowy. W wyniku przeprowadzonych badań zidentyfikowano formy przepływu trójfazowego, opracowano mapę takiego przepływu oraz określono wartości udziałów objętościowych powietrza.

Test results of hydrodynamics of three-phase flow in a pipe bend are presented in the paper. Types of flow patterns formed in a pipe bend and values of void fractions of air were determined. A map of three-phase flow in a pipe bend was elaborated.

Change in flow separation and velocity distribution due to effect of guide vane installed in a 90° pipe bend

51%

Kumar Saha S. , Nandi N.

2017

tom Vol. 21, nr 2

353--361

Present paper makes an effort to study the flow separation and velocity distribution for incompressible turbulent flow through 90° pipe bend due to the effect of guide vane installed in the bend portion. It has been observed here how the normalized velocity distribution profile changes if the guide vane is provided. k-ɛ turbulence model has been adopted for simulation purpose. After validating with existing experimental results, a detailed study has been performed for a particular Reynolds number and four different positions of guide vane. The value of Curvature ratio (Rc/D) has been considered as 1 for present study. The results obtained from the present study have been presented in terms of graphical form. A flow separation region was found at bend outlet for flow through 90° pipe bend without guide vane. This secondary flow separation region was absent for the cases which deals with the flow through 90° pipe bend with guide vane. Velocity distribution at seven different downstream positions have been presented in graphical form. Position to get a fully developed velocity distribution profile for each cases has been estimated on the basis of presented results.