Enhancing efficiency of air distribution by swirled-compact air jets in the mine using the heat utilizators

Voznyak, Orest; Spodyniuk, Nadiia; Yurkevych, Yu.; Sukholova, Iryna; Dovbush, Oleksandr

doi:10.33271/nvngu/2020-5/089

Cited by 14 publications

(9 citation statements)

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Section: Research Of Air Jets Leakagementioning

confidence: 99%

“…Flat [8,11], compact [36,37] and swirled [34,36,37] air jets are one of the most common in ventilation technology. Flat and compact air jets are usually used as horizontal, and swirledas vertical [36,37]. Flat air jets are formed by means of inflow slits with a ratio of length to height l/b ≥ 10, and with a ratio of 1 ˂ l/b ˂ 10 it is expedient to call jets rectangular.…”

Section: Research Of Air Jets Leakagementioning

confidence: 99%

“…where х maxair jet long range, m; bheight of a tidal slit, m; mvelocity attenuation coefficient, which depends on the ratio of the length of the tidal slit to its height l/b; nan indicator of degree, which depends on the ratio of the length of the tidal hole to its height l/b; v 0 and v xrespectively, the absolute initial and axial velocity of the air stream, m/s. Taking into account [36], the long range of the swirled air jets is determined by dependence (2):…”

Section: Research Of Air Jets Leakagementioning

confidence: 99%

“…where х maxair jet long range, m; Ddiameter of the inlet nozzle, m; mair velocity attenuation coefficient, which depends on the angle of the swirling plates inclination α and is determined from [36]; k swa swirling coefficient which depends on the angle of the swirling plates inclination α and is determined from [36];…”

Section: Research Of Air Jets Leakagementioning

confidence: 99%

“…In this case, the requirements of ensuring the normalized velocity and temperature of the air in the working area [14,16,18] and energy efficiency [9,37,39] should be followed. Exhaust air utilization by recuperators is usually used [1,36]. Sometimes the production process takes place in small premises, overloaded with technological equipment and personnel [38].…”

Section: Introductionmentioning

confidence: 99%

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Diagnosis of damage to the ventilation system

Spodyniuk¹,

Voznyak²,

Sukholova³

et al. 2021

Diagnostyka

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The article is devoted to solving of urgent problem to eliminate damages of two types in ventilation systems for air distribution efficiency increasing in the premises by swirled air flow, compact air jet, flat air stream and rectangular air jet. A mathematical model of air supply with swirled air flow, compact air jet, flat air jet and rectangular air stream in the room has been developed. It is shown that in order to achieve the maximum efficiency of air distribution it is necessary to ensure its supply by jets. Graphical and analytical dependences on the basis of the conducted experimental research are presented. Parameters of swirled air flow, compact air jet, flat air stream and rectangular air jet during the formation of a comfortable indoor climate are determined. The results of experimental studies of air supply to the room by the air distribution devices, which form a swirled air flow, compact air stream, flat air flow and rectangular air jet with adequate turbulence and long range of the supply air flow, 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 long range increases.

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