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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BAT8-0008-0002

Czasopismo

Archives of Hydro-Engineering and Environmental Mechanics

Tytuł artykułu

Hydraulic Loss Coefficients in 1D Flows

Autorzy Sawicki, J. M. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Determination of hydraulic losses is a very important problem, both from the cognitive and practical points of view. For the uniform and steady fluid streams these losses are described by the well known algebraic expressions, containing some experimental coefficients. In technical practice it is commonly assumed, that these coefficients can be applied also for more complex kinds of flow (non-uniform and even unsteady). However, the problem analysis shows that the proper level of conformity between the results of calculations and measurements can be obtained only after a considerable enlargement of the loss coefficient. Investigation of available characteristics of non-uniform and unsteady 1D velocity fields, presented in this article, leads to the conclusion that this enlargement is physically justified and in some cases it is possible to determine correction factors, which enable recalculation of "basic" coefficients into their new values, suitable for more complex models of 1D flows.
Słowa kluczowe
EN hydraulic loss   closed-conduits flows   water hammer   open channel flow  
Wydawca Institute of Hydro-Engineering, Polish Academy of Sciences
Czasopismo Archives of Hydro-Engineering and Environmental Mechanics
Rocznik 2007
Tom Vol. 54, nr 2
Strony 95--116
Opis fizyczny Bibliogr. 20 poz., il.
Twórcy
autor Sawicki, J. M.
  • Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, ul. G. Narutowicza 11/12, 80-952 Gdańsk, Poland, jsaw@pg.gda.pl
Bibliografia
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2. Armatynski M., Sawicki J. M. (2002) Determination of energy losses in unsteady flows, Proc. of XXII School of Hydraulics Lubniewo (Poland), IBW PAN, Gdansk (in Polish).
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11. Piwecki T., Biernacki M., Sawicki J. M. (1986) A mathematical model of heat and mass transfer for an open-channel flow, Proc. of Int. Symp. on Hydrological Processes in the Catchment Cracow Technical University, Cracow (Poland).
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16. Sawicki J. M., Wichowski R. (2001) Simplified model of visco-relaxative energy losses in water hammer, Proc. of 7th Symp. on Application of Fluid Mechanics in Env. Eng., Silesian Technical University, Wisła (Poland) (in Polish).
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