MATEC Web Conf.
Volume 302, 201918th International Conference Diagnostics of Machines and Vehicles
|Number of page(s)||9|
|Section||Diagnostics of Various Technical Objects|
|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: email@example.com
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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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