Wyniki wyszukiwania

1

Oświetlamy oczko

100%

Roslon-Szerynska E.

Działkowiec

|

2012

|

nr 04

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Zastosowanie modelu CFD FLUENT do określania strat hydraulicznych w kołowych przewodach wodociągowych ze światłowodem

100%

Siwicki P., Szelag B.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

|

2010

|

tom 19

|

nr 4[50]

Application of CFD Fluent model to determine the hydraulic losses in the circular pipe with fi ber optic cables. The paper presents verifi cation results of the empirical formulas for calculating the hydraulic losses in the circular pipes to the calculation losses in circular pipe with optical fi bers in the shell extensions and circular pipe with fi ber optic cable. Verifi cation was made using the CFD numerical model. The use of empirical formulas for determining the hydraulic losses in the circular pipe with optical fi bers in the shell extensions and circular pipe with fi ber optic cable having a change of hydraulic radius underestimates the size of losses.One source of differences is to change the structure of the velocity distribution in the fl ow area for analyzed case in relation to the circular pipe. Conducted analysis of CFD models should be verifi ed on physical models.

3

Lepiej na łączach

80%

Jazukiewicz Z.

Przegląd Techniczny

|

1992

|

nr 51

4

Infosystem'98. Poznan 1998 r.

80%

Stukowski A.

Atest

|

1998

|

nr 07

29-32

5

Co mogą światłowody

80%

Zatonski D.

Przegląd Techniczny

|

1992

|

nr 23

6

Metody wyznaczania naprezen i przemieszczen w glebie pod obciazeniem

51%

Pytka J., Konstankiewicz K.

Acta Agrophysica

|

1998

|

tom 14

1-94

Soil, as a tractive surface for agricultural tractors as well as military and off-road vehicles, is required to withstand dynamic loads occuring under wheels or tracks. mechanical properties of soil medium result in dependence between load, velocity of sytain and stress- deformation relationships. These information are of the major importance when considering soil compaction as well as tractive performaces of the vehicles. Having analyzed results pulished by many researches, the autors of this work haveconcluded the lack of a proper method for soil stress- deformation measurements. Therefore, the aim of the work is to desing and research some new methods of soil stress- deformation measurements. In the second chapter results of experimental research with a SST transducer are shown. The transducer allows to measure strasses for complete soil stress state calculations. Additionally, a mechanical system was used for soil deformations measurements in the three direction in space.The third chapter contains numerous details on desing of an improved version of the measuring system with an triaxal head. Soil deformations are measured with a novel method, which uses laser and a CCD camera.The next chapter describes another version, which is suitable for field experiments. Detailed descriptions of field procedures are given. A system for soil stress- deformation measurements developed with laser and optical fibers is shown in the last numbered chapter. There are also described some future designs, containing nanotechnology and telemetries.

Ograniczanie wyników

2 Przegląd Techniczny

1 Acta Agrophysica

1 Atest

1 Działkowiec

1 Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

1 Jazukiewicz Z.

1 Konstankiewicz K.

1 Pytka J.

1 Roslon-Szerynska E.

1 Siwicki P.

1 Stukowski A.

1 Szelag B.

1 Zatonski D.

1 2012

1 2010