Solving the Coupled Aerodynamic and Thermal Problem for Modeling the Air Distribution Devices with Perforated Plates

Serhii Khovanskyi, Ivan Pavlenko, Jan Pitel, Jana Mizakova, Marek Ochowiak and Irina Grechka
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Serhii Khovanskyi: Sumy State University, 2 Rymskogo-Korsakova St., 40007 Sumy, Ukraine
Ivan Pavlenko: Sumy State University, 2 Rymskogo-Korsakova St., 40007 Sumy, Ukraine
Jan Pitel: Technical University of Kosice, 1 Bayerova St., 08001 Presov, Slovakia
Jana Mizakova: Technical University of Kosice, 1 Bayerova St., 08001 Presov, Slovakia
Marek Ochowiak: Poznan University of Technology, 5 M. Sklodowska-Curie Sq., 60-965 Poznan, Poland
Irina Grechka: National Technical University “Kharkiv Polytechnic Institute”, 2 Kyrpychova St., 61002 Kharkiv, Ukraine

Energies, 2019, vol. 12, issue 18, 1-16

Abstract: The article is focused on the comprehensive analysis of the aerodynamics of air distribution devices with the combined heat and mass exchange, with the aim to improve the following hydro- and thermodynamic parameters of ventilation systems: flow rate, air velocity, hydraulic losses, and temperature. The inadequacy of the previously obtained characteristics has confirmed the need for more rational designs of air distribution systems. Consequently, the use of perforated plates was proposed to increase hydraulic losses for reducing the average velocity and ensuring a uniform distribution of the velocity field on the outlet of the device. The effectiveness of one of the five possible designs usage is confirmed by the results of numerical simulation. The coefficient of hydraulic losses decreased by 2.5–3.0 times, as well as the uniformity of the outlet velocity field for the air flow being provided. Based on the three-factor factorial experiment, the linear mathematical model was obtained for determining the dependence of the average velocity on the flow rate, plate’s area, and diameter of holes. This model was significantly improved using the multiparameter quasi-linear regression analysis. As a result, the nonlinear mathematical models were obtained, allowing the analytical determination of the hydraulic losses and average velocity of the air flow. Additionally, the dependencies for determining the relative error of measuring the average velocity were obtained.

Keywords: aerodynamics; heat transfer; mass transfer; numerical simulation; multi-factor factorial experiment; hydraulic losses; velocity field (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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