Criterial Equation for the Description of Low-Speed Air Distributor Operation

Klymenko, Hanna; Labay, Volodymyr; Yaroslav, Vitaliy; Gensetskyi, M.

doi:10.1007/978-3-030-27011-7_30

Cited by 9 publications

(3 citation statements)

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“…In view of the importance of the AD, many studies have been carried out on uniform flow and noise reduction. First, studies aimed at investigating the uniform flow performance adopted the parameters of time-averaged flow field to conduct research from the perspectives of dimensional analysis, 4 experimentation 5 and numerical simulation. 5,6 The results showed that although the existing box-type AD is geometrically symmetrical, due to flow instability, it is prone to airflow oscillation, resulting in uneven distribution of downstream airflow.…”

Section: Introductionmentioning

confidence: 99%

Improvement of airflow uniformity and noise reduction with optimized V-shape configuration of perforated plate in the air distributor

Liu,

Sun,

Cui

et al. 2023

Indoor and Built Environment

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The air distributor is the end component of the ventilation system, and its performance directly determines the comfortable and pleasant feeling of the residence. A perforated plate can be added to the air distributor to convert dynamic pressure into static pressure first and then distribute the air flow, which provides better self-adjustment compared with the embedded guide vane structure. However, the perforated plate can lead to a contradiction between head loss, noise and distribution uniformity. To reconcile this problem, a novel V-shape configuration of the perforated plate was put forward in this study. The internal flow and aeroacoustic properties of different types of perforated plates were systematically studied, and a full-scale test platform was built to verify the flow characteristics. The effects of hole size and installation position of the perforated plate on the uniform distribution of air flow were analyzed by the parametric analysis method. Then, the sound pressure level of the optimized perforated plate air distributor was further analyzed. The results show that, with the optimized perforated plate structure, the uniform flow performance was improved by about 30% and the overall sound pressure level was reduced by up to 12 dB.

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Section: Introductionmentioning

confidence: 99%

Improvement of airflow uniformity and noise reduction with optimized V-shape configuration of perforated plate in the air distributor

Liu,

Sun,

Cui

et al. 2023

Indoor and Built Environment

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“…Creation of noise by air-forming nozzles depends on its design performance and the air flow rate. There are known acoustic characteristics of the different air distributors [19,36]. However, it is necessary to investigate noise level of proposed swirled and rectangular air jets at the different initial conditions.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of three types damages to the ventilation system

Voznyak¹,

Spodyniuk²,

Sukholova³

et al. 2022

Diagnostyka

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The article is devoted to solving of urgent problem to eliminate damage in ventilation system. That is caused by non-adequate long range, stagnant unventilated areas in the room existance and high noise level in the premises at air distribution by swirled air flow, compact air jet, flat air stream and rectangular air jet. A noise level of air supply with swirled air flow, compact air jet, flat air jet and rectangular air stream in the room has been investigated. It is shown that in order to achieve the maximum noise level decreasing it is necessary to ensure its supply by jets, which less intensively attenuate before entering the premise working area. Results of the experimental research are presented as graphical and analytical dependences. The acoustic properties of the swirled air flow, compact air jet, flat air stream and rectangular air jet have been investigated and means of situation improving have been determined. The results of experimental research of air supply to the room are presented. It is established that with the increase of the angle of swirling plates inclination and ratio of the slit sides the air jets noise level decreases.

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“…This applies primarily to ventilation and air conditioning systems, where the speed of air movement affects the acoustic characteristics of the system. This does not provide a normalized noise level in the room (Klymenko et al, 2020). Another kind of threat exists in aspiration and air transport systems.…”

Section: Introductionmentioning

confidence: 99%

Two Diameters Method for Binding Sites in Hydraulic Calculation of Pipeline Systems

Voznyak¹,

Yurkevych²,

Myroniuk³

et al. 2021

Theory build. pract.

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The article is devoted to solving the urgent problem of increasing the efficiency of linking sections in the hydraulic calculation of pipeline systems to reduce the material and energy consumption of the system as a whole. The aim of the work is to create an effective method of hydraulic linking of sections of pipelines of microclimate support systems, namely the "two-diameter method" and the establishment of analytical calculations, provided that a meager percentage of the inconsistency of parallel sections. Graphical and analytical dependences on basis of conducted theoretical calculations are presented. Analytical calculation dependences have been established under the condition of achieving a negligible percentage of in consistency of parallel sections. An effective method of hydraulic and aerodynamic linking of parallel sections of pipeline systems has been developed, namely the "two-diameter method".

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Criterial Equation for the Description of Low-Speed Air Distributor Operation

Cited by 9 publications

References 0 publications

Improvement of airflow uniformity and noise reduction with optimized V-shape configuration of perforated plate in the air distributor

Improvement of airflow uniformity and noise reduction with optimized V-shape configuration of perforated plate in the air distributor

Diagnosis of three types damages to the ventilation system

Two Diameters Method for Binding Sites in Hydraulic Calculation of Pipeline Systems

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