Increasing the Pollutants Capture Rate by Local Exhaust Due to the Use of External Swirling Jet. Part 1. Research Methods

To capture pollutants in various buildings and structures, it is necessary to use local exhaust systems. One of the criteria of the local exhaust efficiency, the pollutants capture rate, is proposed to be increased due to the impact of a swirling annular jet and the occurrence of a reverse air flow....

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Bibliographic Details
Published in:Refractories and industrial ceramics 2022-09, Vol.63 (3), p.332-336
Main Authors: Zaitsev, O. N., Logachev, K. I., Gol’tsov, A. B.
Format: Article
Language:English
Subjects:
Air flow
Analysis
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Composites
Design parameters
Ecology
Environmental aspects
Exhaust systems
Flow velocity
Glass
Materials Science
Methods
Natural Materials
Pollutants
Swirling
System effectiveness
Vortices
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Summary:To capture pollutants in various buildings and structures, it is necessary to use local exhaust systems. One of the criteria of the local exhaust efficiency, the pollutants capture rate, is proposed to be increased due to the impact of a swirling annular jet and the occurrence of a reverse air flow. The circular exhaust is placed coaxially into the external cylindrical casing, in which the air flow is swirled due to the tangential supply of two supply jets into the casing. A vortex dome, which helps to increase the efficiency of such a vortex exhaust, is formed. The change in the axial air velocity with distance from the vortex exhaust was experimentally and numerically investigated for 11 structures, in each of which 4 different ratios of exhaust and supply air flow rates were set. In the investigated options of using the proposed exhaust systems, the velocity increases significantly at a certain range of distances from them. Acombination of design and operation mode parameters that contribute to the highest capture rate by vortex exhaust is determined. The results obtained are useful in designing effective exhaust systems to capture pollutants.
ISSN:1083-4877
1573-9139
DOI:10.1007/s11148-022-00731-8