Improving of ventilation efficiency at air distribution by the swirled air jets

Voznyak, Orest; Savchenko, Olena; Spodyniuk, Nadiia; Sukholova, Iryna; Kasynets, Mariana; Dovbush, Oleksandr

doi:10.1556/606.2021.00419

Cited by 14 publications

(9 citation statements)

References 17 publications

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“…This work is continuing of air distribution research [11]. The variation of the air volume flow rate L, m 3 /h was provided.…”

Section: Results Of Research Of the Swirl Flat Rectangular And Compac...mentioning

confidence: 99%

“…It was necessary to carry out theoretical and experimental investigations of all types of presented air streams and to determine numerically of tidal air flows characteristics. It is known [11], that round and compact air jets have similar characteristics, though hole's shape for the round air stream is round and for compact air stream is round or square. It would be interesting to compare the round and compact air jets characteristics depending on the running coordinate and size of tidal air distributor.…”

Section: Results Of Research Of the Swirl Flat Rectangular And Compac...mentioning

confidence: 99%

“…The reason is that the effective attenuation of the air jet velocity is not provided. The quantitative characteristics of the air jet velocity attenuation is coefficient m [11]. So, in order to provide normative values of air velocity in the premise working area the air jet velocity attenuation coefficient m should be reduced.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of air jets velocity attenuation at special initial conditions

Voznyak¹,

Spodyniuk²,

Savchenko³

et al. 2022

Diagnostyka

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The article is devoted to solving the significant problem of efficiency increasing of air distribution in the premise by swirl air jet. The aim of the article is to decrease coefficient of velocity attenuation due to intensification of initial turbulence of different air streams leakage from the air distributor and to obtain of analytical equations for calculation of air distribution in a room to ensure the normative indoor air parameters. Effect of flow twisting results in a reduction of the velocity attenuation coefficient by 2.4 times. The regression analysis testified that the attenuation coefficient of the swirl air jet is more affected by the angle of the twisting plates inclination and less affected by the angle of change of the air flow direction. The attenuation coefficient of all types of rectangular air jets is more influenced by the the ratio of the sides of slit b/l and the angle of change of the air flow direction is also less affected. To minimize the attenuation factor, it is effective to use air distributors at smaller swivel plates inclination angles for swirl air jets and a smaller slit size ratio for all types of rectangular air jets.

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“…This work is continuing of air distribution research [11]. The variation of the air volume flow rate L, m 3 /h was provided.…”

Section: Results Of Research Of the Swirl Flat Rectangular And Compac...mentioning

confidence: 99%

Section: Results Of Research Of the Swirl Flat Rectangular And Compac...mentioning

confidence: 99%

See 1 more Smart Citation

Analysis of air jets velocity attenuation at special initial conditions

Voznyak¹,

Spodyniuk²,

Savchenko³

et al. 2022

Diagnostyka

Self Cite

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“…The use of swirled air jets makes it possible to obtain small values of the velocity of air movement in the working area of the premises at high multiples of air exchange (Voznyak et al, 2022). This is due to the fact that there is an intensive mixing of the supply air with the air of the room and a rapid attenuation of the velocity and excess temperature of the supply air flow.…”

Section: Air Distribution By Tjadmentioning

confidence: 99%

“…Such devices ensure intensive mixing of the supply air with the surrounding (Voznyak et al, 2021). One of the methods of increasing the turbulence of air flows is the use of swirled inflow jets (Voznyak et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Increasing Economic Efficiency When Creating a Dynamic Microclimate in Compressed Conditions of Production Premises

Voznyak,

Spodyniuk,

Sukholova

et al. 2024

GLCE

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This work is devoted to increasing economic efficiency when using two-stream air distributors that form a swirled and flat stream while providing a dynamic microclimate in compressed conditions of industrial premises. The design of a two-jet air distributor is proposed, which forms a swirled and flat laying air jet, that provides intensive attenuation of air flow velocity and temperature in stationary and variable mode. Measures aimed at saving cold energy are considered, namely, air supply in a variable mode, use of the flooring effect, use of devices for intensification of tidal flow turbulence. A set of optimal measures for obtaining the maximum economic effect is determined. A method of development and calculation of inflow mechanical ventilation systems based on the specified air distributors is proposed. The economic evaluation of the use of air distribution devices proved that the use of a two-jet air distributor makes it possible to obtain some economic effect.

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