title: Ð§Ð¸ÑÐ»ÐµÐ½Ð½Ð¾Ðµ Ð¼Ð¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ ÑÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾Ð³Ð¾ ÑÐµÑÐµÐ½Ð¸Ñ Ð²Ð¾ Ð²Ñ Ð¾Ð´Ð½Ð¾Ð¼ Ð¿Ð°ÑÑÑÐ±ÐºÐµ ÑÐµÐ½ÑÑÐ¾Ð±ÐµÐ¶Ð½Ð¾Ð³Ð¾ Ð²ÐµÐ½ÑÐ¸Ð»ÑÑÐ¾ÑÐ°
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: Numerical simulation of turbulent flow in the contraction nozzle of a centrifugal fan
Creators: name: ÐÐ¾Ð³Ð¸Ð½Ð¾Ð²Ð°, ÐÑÐµÐ½Ð¸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: 2021
Subjects: ÐÐ¾Ð´ÐµÐ»Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ
Ð§Ð¸ÑÐ»ÐµÐ½Ð½ÑÐµ Ð¼ÐµÑÐ¾Ð´Ñ
Ð¢ÑÑÐ±ÑÐ»ÐµÐ½ÑÐ½Ð¾Ðµ ÑÐµÑÐµÐ½Ð¸Ðµ
ÐÐµÐ½ÑÐ¸Ð»ÑÑÐ¾ÑÑ ÑÐµÐ½ÑÑÐ¾Ð±ÐµÐ¶Ð½ÑÐµ
ÐÐ°ÑÑÑÐ±ÐºÐ¸
Ð¸Ð·Ð¼ÐµÑÐµÐ½Ð¸Ðµ ÑÐ°ÑÑ Ð¾Ð´Ð°
ÐºÐ¾ÑÑÑÐ¸ÑÐ¸ÐµÐ½Ñ Ð¼ÐµÑÑÐ½Ð¾Ð³Ð¾ ÑÐ¾Ð¿ÑÐ¾ÑÐ¸Ð²Ð»ÐµÐ½Ð¸Ñ
mass flow rate
local resistance coefficient

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description: The paper presents the results of numerical simulation of turbulent flow in the inlet pipe of a centrifugal fan, which were performed to determine the shape of the nozzle providing the closest to uniform cross-section velocity profile and then to develop the air mass flow rate measure method by measurement of flow parameters at a single point. Following tasks were solved: 1. Validation of the mathematical model by comparison with available experimental data to choose the most appropriate shape of contraction nozzle. 2. Carrying out simulations in wide range of atmospheric parameters and pressure drops with chosen nozzle design in order to find out how flow parameters at a single point on axis at a given cross section are related to area-averaged parameters and deriving the formula for calculating mass flow rate. 3. Estimation of the influence of different inlet boundary conditions on the derived formula suitability. As a result of research there were proposed the design of centrifugal fan intake, which appears as small-sized and accurate flowmeter, and measurement procedure of air flow rate by the flow parameters at a single point of pipe crosssection.