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Real values of local loss coefficients for flow through pipe sudden contraction (contraction ratio d/D € (035, 0,82) were determined. Variations (in time and vicinity of resistance) and the influence of the Reynolds anmber (Re € (1000, 50000)) on phenomena in the vicinity of sudden contraction were taken into account. Experimental values of ζ coefficients were referred to flow structure in the vicinity...
Local and fluctuational velocity distribution, extent of pipe contraction influence and the range of Reynolds number (determining the velocity distribution in the vicinity of resistance) were determined on the basis of wemometrical researches' results. These experiments were carried out for flows through pipe sudden contraction (contraction ratio d/D€(0,53,0,82)) for the Reynolds number in the range...
Flows through channels and tubes with step-changing cross-section, including a channel with built-in orifice, were analysed based on the literature survey. The compiled material allowed us to observe some regularities, ;howed difficulties occurring during their analysis and made it possible to prepare our own research programme. Many authors refer to such axially symmetrical constrictions as an orifice...
Omówiono badania płaskiego przepływu przez kana! ze skokową zmianą przekroju przepływowego. W literaturze dość dużo uwagi poświecono badaniom numerycznym i doświadczalnym przepływu przez przewód prostokątny z nagłym rozszerzeniem. Prowadzono badania zarówno przepływu laminarnego, przejściowego jak i turbulentnego. Wielu autorów podejmuje próby porównania wyników własnych badań numerycznych z badaniami...
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