Characteristics of Mult-Nozzle Impactors with 50 µm Laser-Drilled Nozzles
(1995) In Journal of Aerosol Science 26(6). p.915-931- Abstract
- The objective of this study was to provide data for the design of multi-nozzle impactors giving size-fractionated samples for X-ray emission analysis and for size-distribution determinations of the α-particle activity from aerosol-particle-attached radon progenies. Different multi-nozzle impactors with laser-drilled 50–60 μm diameter nozzles designed for a cut-off diameter of about 0.05 μm were experimentally characterised. The nozzles were placed in a spiral pattern within a circle of 8.0 mm diameter. The nozzle-plate porosities were 0.013 and 0.050 (porosity = total cross-sectional area of nozzles divided by nozzle-plate area). The results show that laser-drilled nozzles can be used for multi-nozzle impactors and that the maximum... (More)
- The objective of this study was to provide data for the design of multi-nozzle impactors giving size-fractionated samples for X-ray emission analysis and for size-distribution determinations of the α-particle activity from aerosol-particle-attached radon progenies. Different multi-nozzle impactors with laser-drilled 50–60 μm diameter nozzles designed for a cut-off diameter of about 0.05 μm were experimentally characterised. The nozzles were placed in a spiral pattern within a circle of 8.0 mm diameter. The nozzle-plate porosities were 0.013 and 0.050 (porosity = total cross-sectional area of nozzles divided by nozzle-plate area). The results show that laser-drilled nozzles can be used for multi-nozzle impactors and that the maximum nozzle-plate porosity is limited by the cross flow. The collection characteristics of the multi-nozzle impactors studied here were found to be more dependent on the Reynolds number and the S/W ratio [the ratio of the distance (S) between nozzle plate and impaction plate to the nozzle diameter (W)], than what has been shown for single-nozzle impactors. The S/W ratio and the Reynolds number must be considered if high size resolution is to be achieved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/798592
- author
- Gudmundsson, Anders LU ; Bohgard, Mats LU and Hansson, Hans-Christen
- organization
- publishing date
- 1995
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- impactor, aerosol
- in
- Journal of Aerosol Science
- volume
- 26
- issue
- 6
- pages
- 915 - 931
- publisher
- Elsevier
- external identifiers
-
- scopus:0008327709
- ISSN
- 0021-8502
- DOI
- 10.1016/0021-8502(95)00023-6
- language
- English
- LU publication?
- yes
- id
- 73500bbf-604a-44f5-a156-f19b965f3407 (old id 798592)
- alternative location
- http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V6B-3YF4DH4-N2&_user=745831&_coverDate=09%2F30%2F1995&_alid=688975176&_rdoc=1&_fmt=summary&_orig=search&_cdi=5810&_sort=d&_docanchor=&view=c&_ct=1&_acct=C000041498&_version=1&_urlVersion=0&_userid=745831&md5=0e72adbdc3f8cbb9ad51fda73828a481
- date added to LUP
- 2016-04-04 09:20:25
- date last changed
- 2021-03-21 04:57:21
@article{73500bbf-604a-44f5-a156-f19b965f3407,
abstract = {{The objective of this study was to provide data for the design of multi-nozzle impactors giving size-fractionated samples for X-ray emission analysis and for size-distribution determinations of the α-particle activity from aerosol-particle-attached radon progenies. Different multi-nozzle impactors with laser-drilled 50–60 μm diameter nozzles designed for a cut-off diameter of about 0.05 μm were experimentally characterised. The nozzles were placed in a spiral pattern within a circle of 8.0 mm diameter. The nozzle-plate porosities were 0.013 and 0.050 (porosity = total cross-sectional area of nozzles divided by nozzle-plate area). The results show that laser-drilled nozzles can be used for multi-nozzle impactors and that the maximum nozzle-plate porosity is limited by the cross flow. The collection characteristics of the multi-nozzle impactors studied here were found to be more dependent on the Reynolds number and the S/W ratio [the ratio of the distance (S) between nozzle plate and impaction plate to the nozzle diameter (W)], than what has been shown for single-nozzle impactors. The S/W ratio and the Reynolds number must be considered if high size resolution is to be achieved.}},
author = {{Gudmundsson, Anders and Bohgard, Mats and Hansson, Hans-Christen}},
issn = {{0021-8502}},
keywords = {{impactor; aerosol}},
language = {{eng}},
number = {{6}},
pages = {{915--931}},
publisher = {{Elsevier}},
series = {{Journal of Aerosol Science}},
title = {{Characteristics of Mult-Nozzle Impactors with 50 µm Laser-Drilled Nozzles}},
url = {{http://dx.doi.org/10.1016/0021-8502(95)00023-6}},
doi = {{10.1016/0021-8502(95)00023-6}},
volume = {{26}},
year = {{1995}},
}