Techniques for collection of representative aerosol samples

Belyaev, Sergey; Levin, L. M.

doi:10.1016/0021-8502(74)90130-x

Cited by 231 publications

(133 citation statements)

References 5 publications

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“…As can be seen assuming no particle rebound from the sampler internal walls in the numerical model results in a significant overestimation in the value of A. This is also true of the predictions of the Belyaev and Levin (1974) model. However, taking into account the removal of particles by the reverse flow brings the numerical predictions of A close to the experimental data.…”

Section: Methodsmentioning

confidence: 53%

“…Hence it is possible that particles which cross the sampler face, and hence enter the sampling tube, are then carried back out of the sampler by the reverse flow. Belyaev and Levin (1974). As can be seen assuming no particle rebound from the sampler internal walls in the numerical model results in a significant overestimation in the value of A.…”

Section: Methodsmentioning

confidence: 76%

“…A study has been made of the behaviour of A as R increase for various situations. Recent experimental data, Paik and Vincent (2002), for the aspiration efficiency of a thin-walled sampler was found to differ increasingly from the widely used semi-empirical model of Belyaev and Levin (1974) as the velocity ratio R increased above about 6. The numerical model described here was used to investigate this situation in order to gain an understanding of the reasons for this difference.…”

Section: Methodsmentioning

confidence: 89%

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A Study of aerosol sampling at high values of the velocity ratio

Dunnett

2004

Journal of Aerosol Science

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Section: Methodsmentioning

confidence: 53%

Section: Methodsmentioning

confidence: 76%

Section: Methodsmentioning

confidence: 89%

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A Study of aerosol sampling at high values of the velocity ratio

Dunnett

2004

Journal of Aerosol Science

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“…Although thin-walled samplers are idealised samplers, gaining an understanding of how they perform provides insights into the performance of more complicated samplers. Hence this area of aerosol sampling has received much attention, see, for example, Belyaev and Levin (1974), Jayasekera and Davies (1980), Grinshpun et al (1990). In these studies the aspiration characteristics of thin-walled samplers were investigated for various operating parameters.…”

Section: Introductionmentioning

confidence: 99%

“…In the work of Belyaev and Levin (1974) a model was developed for the aspiration efficiency, A, of a thin-walled sampler facing the wind which has been widely accepted.…”

Section: Introductionmentioning

confidence: 99%

A numerical study of the aspiration efficiency of a thin-walled sampler facing the wind for high velocity ratios

Dunnett

2005

Journal of Aerosol Science

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Variability of aerosol particle number concentrations observed over the western Pacific in the spring of 2009

Takegawa

Moteki

Oshima³

et al. 2014

JGR Atmospheres

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Airborne measurements of aerosols were conducted over the western Pacific in the spring of 2009 during the Aerosol Radiative Forcing in East Asia (A-FORCE) aircraft campaign. The A-FORCE flights intensively covered an important vertical-latitudinal range in the outflow region of East Asia (0-9 km altitude; 27°N-38°N). This paper presents the variability of aerosol particle number concentrations obtained by condensation particle counters and a Single-Particle Soot Photometer (SP2), with the focus on those in the free troposphere. The number concentration data include total condensation nuclei with particle diameters (d p ) larger than 10 nm (total CN 10 ), PM 0.17 -CN 10 (d p~1 0-130 nm), and SP2 black carbon (N BC ; d p~7 5-850 nm). Large increases in total CN 10 that were not associated with N BC were observed in the free troposphere, suggesting influences from new particle formation (NPF). Statistical characteristics of total CN 10 , PM 0.17 -CN 10 , and N BC in the lower troposphere (LT; 0-3 km), middle troposphere (MT; 3-6 km), and upper troposphere (UT; 6-9 km) are investigated. The correlation between total CN 10 and N BC , along with the ratio of PM 0.17 to total CN 10 and carbon monoxide mixing ratio (CO), is used to interpret the observed variability. The median concentrations of total CN 10 and PM 0.17 -CN 10 in the UT were higher than those in the MT by a factor of~1.4 and 1.6, respectively. We attribute the enhancements of CN 10 in the UT to NPF. Possible mechanisms affecting NPF in the free troposphere are discussed.

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Techniques for collection of representative aerosol samples

Cited by 231 publications

References 5 publications

A Study of aerosol sampling at high values of the velocity ratio

A Study of aerosol sampling at high values of the velocity ratio

A numerical study of the aspiration efficiency of a thin-walled sampler facing the wind for high velocity ratios

Variability of aerosol particle number concentrations observed over the western Pacific in the spring of 2009

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