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 of Re €(1000, 100000). Exemplary velocity profiles (for the greatest pipe diameter lead) and contour diagrams - izotachs (for the greatest and the least pipe diameter leads) were presented in this paper.
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