Focusing of the flow capture for local exhaust ventilation systems

S. Y. Spotar, A. L. Sorokin

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Problem statement: The extraction hoods commonly used as inlet element of the local ventilation systems exhibit limited emission capture over moderate distances from the source of the hazardous emissions. Proposed inclusion of a swirling peripheral jet was found to increase the effective length over which the extraction hood successfully captures harmful fumes. However information on a detailed pattern field of the vortex focused inflow was insufficient thus restricting the potential applications of the method. Approach: The numerical modeling study of the focusing by vortex inflow was accomplished to reveal the implication of the key operating parameters. In addition the visualization technique was applied to confirm the fume capturing features. Results: The simulated overall flow field patterns for an inflow of 10 m sec-1 value under sets of 0.5-1.5 swirl numbers and 0- 21 m sec-1 outcome velocities of peripheral jet showed the arrangement and contour of the capture stream. Under optimum parameters the capture zone derived from the vector velocity field yielded up to 4 inlet diameters near-axis distance from the extractor entrance. The complimentary observations using laser sheet visualization technique confirmed the enhanced capturing capacity from the mist or smoke sources of emission. Conclusion: Through numerical modeling study the capacity of peripheral vortex shielding to generate the more concentrated exhaust inflow comparing with action of the conventional hood has been elucidated.

Original languageEnglish
Pages (from-to)732-738
Number of pages7
JournalAmerican Journal of Applied Sciences
Volume7
Issue number6
Publication statusPublished - 2010
Externally publishedYes

Fingerprint

ventilation
inflow
vortex
visualization
smoke
flow field
modeling
laser
parameter
fume

Keywords

  • Capturing flow
  • Local ventilation
  • Numerical modeling
  • Vortex suction

ASJC Scopus subject areas

  • General

Cite this

Focusing of the flow capture for local exhaust ventilation systems. / Spotar, S. Y.; Sorokin, A. L.

In: American Journal of Applied Sciences, Vol. 7, No. 6, 2010, p. 732-738.

Research output: Contribution to journalArticle

@article{4337e6a63cef47ecb71072de12ef1369,
title = "Focusing of the flow capture for local exhaust ventilation systems",
abstract = "Problem statement: The extraction hoods commonly used as inlet element of the local ventilation systems exhibit limited emission capture over moderate distances from the source of the hazardous emissions. Proposed inclusion of a swirling peripheral jet was found to increase the effective length over which the extraction hood successfully captures harmful fumes. However information on a detailed pattern field of the vortex focused inflow was insufficient thus restricting the potential applications of the method. Approach: The numerical modeling study of the focusing by vortex inflow was accomplished to reveal the implication of the key operating parameters. In addition the visualization technique was applied to confirm the fume capturing features. Results: The simulated overall flow field patterns for an inflow of 10 m sec-1 value under sets of 0.5-1.5 swirl numbers and 0- 21 m sec-1 outcome velocities of peripheral jet showed the arrangement and contour of the capture stream. Under optimum parameters the capture zone derived from the vector velocity field yielded up to 4 inlet diameters near-axis distance from the extractor entrance. The complimentary observations using laser sheet visualization technique confirmed the enhanced capturing capacity from the mist or smoke sources of emission. Conclusion: Through numerical modeling study the capacity of peripheral vortex shielding to generate the more concentrated exhaust inflow comparing with action of the conventional hood has been elucidated.",
keywords = "Capturing flow, Local ventilation, Numerical modeling, Vortex suction",
author = "Spotar, {S. Y.} and Sorokin, {A. L.}",
year = "2010",
language = "English",
volume = "7",
pages = "732--738",
journal = "American Journal of Applied Sciences",
issn = "1546-9239",
publisher = "Science Publications",
number = "6",

}

TY - JOUR

T1 - Focusing of the flow capture for local exhaust ventilation systems

AU - Spotar, S. Y.

AU - Sorokin, A. L.

PY - 2010

Y1 - 2010

N2 - Problem statement: The extraction hoods commonly used as inlet element of the local ventilation systems exhibit limited emission capture over moderate distances from the source of the hazardous emissions. Proposed inclusion of a swirling peripheral jet was found to increase the effective length over which the extraction hood successfully captures harmful fumes. However information on a detailed pattern field of the vortex focused inflow was insufficient thus restricting the potential applications of the method. Approach: The numerical modeling study of the focusing by vortex inflow was accomplished to reveal the implication of the key operating parameters. In addition the visualization technique was applied to confirm the fume capturing features. Results: The simulated overall flow field patterns for an inflow of 10 m sec-1 value under sets of 0.5-1.5 swirl numbers and 0- 21 m sec-1 outcome velocities of peripheral jet showed the arrangement and contour of the capture stream. Under optimum parameters the capture zone derived from the vector velocity field yielded up to 4 inlet diameters near-axis distance from the extractor entrance. The complimentary observations using laser sheet visualization technique confirmed the enhanced capturing capacity from the mist or smoke sources of emission. Conclusion: Through numerical modeling study the capacity of peripheral vortex shielding to generate the more concentrated exhaust inflow comparing with action of the conventional hood has been elucidated.

AB - Problem statement: The extraction hoods commonly used as inlet element of the local ventilation systems exhibit limited emission capture over moderate distances from the source of the hazardous emissions. Proposed inclusion of a swirling peripheral jet was found to increase the effective length over which the extraction hood successfully captures harmful fumes. However information on a detailed pattern field of the vortex focused inflow was insufficient thus restricting the potential applications of the method. Approach: The numerical modeling study of the focusing by vortex inflow was accomplished to reveal the implication of the key operating parameters. In addition the visualization technique was applied to confirm the fume capturing features. Results: The simulated overall flow field patterns for an inflow of 10 m sec-1 value under sets of 0.5-1.5 swirl numbers and 0- 21 m sec-1 outcome velocities of peripheral jet showed the arrangement and contour of the capture stream. Under optimum parameters the capture zone derived from the vector velocity field yielded up to 4 inlet diameters near-axis distance from the extractor entrance. The complimentary observations using laser sheet visualization technique confirmed the enhanced capturing capacity from the mist or smoke sources of emission. Conclusion: Through numerical modeling study the capacity of peripheral vortex shielding to generate the more concentrated exhaust inflow comparing with action of the conventional hood has been elucidated.

KW - Capturing flow

KW - Local ventilation

KW - Numerical modeling

KW - Vortex suction

UR - http://www.scopus.com/inward/record.url?scp=77954189819&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954189819&partnerID=8YFLogxK

M3 - Article

VL - 7

SP - 732

EP - 738

JO - American Journal of Applied Sciences

JF - American Journal of Applied Sciences

SN - 1546-9239

IS - 6

ER -