Issue |
MATEC Web Conf.
Volume 302, 2019
18th International Conference Diagnostics of Machines and Vehicles
|
|
---|---|---|
Article Number | 01021 | |
Number of page(s) | 9 | |
Section | Diagnostics of Various Technical Objects | |
DOI | https://doi.org/10.1051/matecconf/201930201021 | |
Published online | 29 November 2019 |
Evaluation of linear losses in ventilation ducts with a rounded rectangle cross-section
1 UTP University of Science and Technology, Al. Prof. S. Kaliskiego 7, Bydgoszcz, Poland
2 Václav Tesař, Institute of Thermomechanics of the CAS, v. v. i., Dolejškova 1402/5, 182 00 Praha 8, Czech Republic
* Corresponding author: kazimierz.peszynski@utp.edu.pl
The paper presents a new ventilation system characterized by the cross-section of the channels in the shape of a rounded rectangle. The basic research problem was the determination of local losses in the system components. To achieve this goal, it is necessary to know the linear losses in the ducts. The principle of determining both types of losses was presented. The friction coefficients of linear pressure losses referred to the unit of the straight length of the duct section ζl[m−1] as well as generalized dimensionless friction coefficient of linear pressure losses λ [-] is presented. The main achievement of the paper is the statement that the lambda coefficient λ can replace the coefficients ζl examined duct cross-sections.
© The Authors, published by EDP Sciences, 2019
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