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Współczynnik wydatku przelewu szybowego w separatorze wirowym

Gronowska M. A., Sawicki J. M.

Inżynieria Morska i Geotechnika

2014

nr 1

11--13

Szczególny przypadek przelewu szybowego stosowany w separatorach wirowych. Wyznaczenie współczynnika wydatku takiego przelewu. Przeprowadzenie pomiarów w laboratorium hydraulicznym i zaproponowanie praktycznych wzorów pozwalających na obliczanie współczynnika. Oszacowanie dokładności wyniku.

The special case of the shaft overfall has been discussed. It was stated, that the discharge coefficient for such structure must be determined. On the base of laboratory measurements, a practical formula, describing this coefficient, has been derived. The accuracy of calculations has been evaluated.

Transversal pressure effect in circulative separators

Sawicki J. M.

Archives of Hydro-Engineering and Environmental Mechanics

2012

Vol. 59, nr 1-2

3-12

Progressive urban development of the human environment requires new methods of rain water treatment. Recently, there has been a growing interest in the improvement of gravitational suspension separation, and especially in the application of the centrifugal force. This important factor can be induced in two ways; by the circulation of the reservoir containing the fluid (centrifugal separators), or by a tangent supply of this reservoir (circulative separators). In addition to the centrifugal force, another essential transversal force is at work in this case, resulting from the local variability of the pressure. In the literature, this force is derived for centrifuge conditions, but applied also to circulative separators, which is questionable, as in the latter devices velocity and pressure fields are clearly different. The paper is devoted to the determination of the transversal pressure effect in circulative separators. First, a model of tangent and radial velocity profiles is introduced. The radial pressure distribution, calculated on this basis and verified experimentally, leads to the final result, that is, a technical formula describing the force in question.

Specification of forces in rotational separator

Gronowska M. A.

Archives of Hydro-Engineering and Environmental Mechanics

2012

Vol. 59, nr 1-2

49-62

Today, intensive urban development calls for new technologies in the field of environmental engineering. Extensive infrastructure requires more roads and motorways, as well as larger areas covered with concrete, which altogether leads to greater volumes of water creating surface run-off. Rotational separators, besides lamella and coalescence units, may provide a highly efficient method for treatment of storm water running off roads and motorways. This paper is focused on two important aspects of the operation of rotational separators: forces acting on a particle in liquid flow, and pressure distribution in the chamber. The resulting relations constitute crucial elements in the future method of designing such devices.