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title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Complex cases of local resistances in hydraulic systems
Creators: name: Ð¨ÑÐ¼Ð¸ÑÐ¸Ð½Ð°, ÐÐ½Ð°ÑÑÐ°ÑÐ¸Ñ
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: ÐÐ¸Ð´ÑÐ°Ð²Ð»Ð¸ÑÐµÑÐºÐ¸Ðµ ÑÐ¸ÑÑÐµÐ¼Ñ
Ð³Ð¸Ð´ÑÐ°Ð²Ð»Ð¸ÑÐµÑÐºÐ¾Ðµ ÑÐ¾Ð¿ÑÐ¾ÑÐ¸Ð²Ð»ÐµÐ½Ð¸Ðµ
ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½Ñ Ð¼ÐµÑÑÐ½Ð¾Ð³Ð¾ ÑÐ¾Ð¿ÑÐ¾ÑÐ¸Ð²Ð»ÐµÐ½Ð¸Ñ
Ð¿Ð¾ÑÐµÑÐ¸ Ð´Ð°Ð²Ð»ÐµÐ½Ð¸Ñ
flow resistance
local resistance coefficient
loss of pressure

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description: The topic of the graduate qualifying work: "Complex cases of local resistances in hydraulic systems". This work is devoted to the study of the mutual influence of local resistances installed butt-to-butt. The object of the study is a pressure pipeline. The subject of the study is the flow of liquid in a pressure pipeline with a local resistance of a complex design. An experimental study of complex cases of local resistances was carried out on a certified laboratory installation at the Higher School of Hydraulic Engineering and Power Engineering of Peter the Great St.Petersburg Polytechnic University during 2021-2022. During the experiment, the pressure level marks, the time of emptying the pressure tank and the volume of liquid in the measuring tank were recorded. When processing the obtained data, the dependences of the coefficients of local resistances of a complex structure on the Reynolds number, and the pressure losses Â on the flow rate Â were established. It is determined that the numerical values of the resistance coefficients for butt-mounted elements depend more on the type of local resistance. In most of the studied cases, the experimental resistance coefficients of the device complex turned out to be lower than the values found by the superposition method for individual elements.