THERMAL SCIENCE

International Scientific Journal

Jasmina Bogdanović-Jovanović

,

Živojin M. Stamenković

,

Jelena D. Petrović

LOW PRESSURE CENTRIFUGAL FANS OPERATING WITH DIFFERENT AIR TEMPERATURES

ABSTRACT
For normal operating conditions of the centrifugal fan, the manufacturers provide operating curves (total pressure of the fan, static pressure of the fan, power, and efficiency) for standard air conditions. However, when a fan operates with air at different, usually elevated temperatures, their operating curves can significantly differ. As a result, the fan efficiency decreases, and the energy efficiency of the fan may be reduced. Fan operation in such air conditions also affects its acoustic characteristics. This paper investigates two types of centrifugal fans: with forward curved and backward inclined blades. The main goal was to determine how their operating and acoustic characteristics change with the change in air temperature. For this analysis, low pressure centrifugal fans are used, for which we already had measured operating and acoustic characteristics. The influence of the type of impeller and the curvature of the blades play an important role in the operation of the fan. For numerical investigation, ANSYS CFX software was used, and obtained results show excellent agreement with experimental measurements.
KEYWORDS
centrifugal fan, forward and backward blades, aerodynamic and acoustic characteristics, air temperature, efficiency
PAPER SUBMITTED: 2023-06-03
PAPER REVISED: 2023-08-17
PAPER ACCEPTED: 2023-08-25
PUBLISHED ONLINE: 2023-10-08
DOI REFERENCE: https://doi.org/10.2298/TSCI230603215B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 6, PAGES [4497 - 4512]
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Low pressure centrifugal fans operating with different air temperatures

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence