Effects of flange size on dividing streamlines of exterior hoods in cross drafts

Journal of Occupational and Environmental Hygiene
Rong Fung HuangChih-Chieh Chen

Abstract

Effects of flange size on the flow patterns of an exterior circular hood subject to the influence of various uniform cross drafts were studied in an apparatus consisting of hood-model/wind-tunnel assembly. The cross draft to suction velocity ratio covered the range from 0.056 to 0.792. The flange width to hood diameter ratio spanned from 1.2 to 3.0. The hood equipped without flange was also probed. A two-component laser Doppler anemometer was used to measure the velocity field on the symmetry plane. The streamline patterns were obtained from the measured velocity data. The cross draft caused a capture envelope. The boundary of the envelope was described by a dividing streamline. It was found that the flange width presented complex effects on the capture envelope and the dividing streamline. Corresponding to a cross draft to suction velocity ratio, a critical flange width existed. If the flange width was smaller than the critical value, the dividing streamline would terminate at the downstream tip of the flange. The behaviors of the capture envelope and the dividing streamline of the hood in cross draft under different flange widths are presented and discussed.

References

May 1, 1988·American Industrial Hygiene Association Journal·L M ConroyM R Flynn
Apr 1, 1987·American Industrial Hygiene Association Journal·M R Flynn, M J Ellenbecker
Jan 1, 1986·The Annals of Occupational Hygiene·M R Flynn, M J Ellenbecker
Oct 1, 1983·American Industrial Hygiene Association Journal·M J EllenbeckerW A Burgess
May 3, 2001·AIHAJ : a Journal for the Science of Occupational and Environmental Health and Safety·R F HuangC W Chen
Oct 24, 2001·AIHAJ : a Journal for the Science of Occupational and Environmental Health and Safety·R F HuangC C Chen

❮ Previous
Next ❯

Citations

Jul 20, 2018·Journal of Occupational and Environmental Hygiene·K I LogachevO A Averkova

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

AIHAJ : a Journal for the Science of Occupational and Environmental Health and Safety
R F HuangChun-Wann Chen
AIHAJ : a Journal for the Science of Occupational and Environmental Health and Safety
R F HuangC-C Chen
Journal of Occupational and Environmental Hygiene
Rong Fung HuangCheng-Ping Chang
American Industrial Hygiene Association Journal
M R Flynn, M J Ellenbecker
© 2022 Meta ULC. All rights reserved