Impaction from rectangular jets

Mercer, T.T.; Chow, Helen

doi:10.1016/0021-9797(68)90011-8

Cited by 38 publications

(11 citation statements)

References 6 publications

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“…The work of Ranz and Wong (1952a), however, did not account for the effects of jet-to-plate distance on the flow field. This ability was added many years latter by Mercer and Chow (1968) and Mercer and Stafford (1969) for round and rectangular nozzles, respectively. Their changes were only in the specification of the flow field; the determination of whether a particle impacted was the same as used by Ranz and Wong (1952a).…”

Section: To 1959mentioning

confidence: 99%

History of Impactors—The First 110 Years

Marple

2004

Aerosol Science and Technology

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This history of impactors detailed in this article covers the time span from 1860 to 1970. The origin of the inertial impactor was in the time period from 1860 to 1870, and the very first impactors were essentially the same as they are today-a jet of particle-laden air impinging on a plate. Impactors have a history of going through spurts of development. In the 1800s, impactors allowed researchers for the very first time to quickly collect particles and inspect them under a microscope to study the relationship between dust and disease. This was an exciting time for researchers, and these early impactors were used extensively. The next spurt of development was about 1920, when impactors were rediscovered in the form of konimeters, dust counters, and impingers, which were considerably more advanced than the impactors of the 1800s and were used extensively for determining the dust concentrations to which industrial workers were exposed. These instruments were used in different forms until the mid 1940s when the cascade impactor was developed. The discovery of the cascade impactor, along with extensive theoretical analysis of jet impaction in the early 1950s, led to much activity in cascade impactor development. In 1970, with the help of finite difference techniques and high-speed computers, a parametric study of impactors was made which unlocked nearly all of the secrets of how to design an impactor. From 1970 forward, the design of impactors became rather routine, and numerous impactors of all shapes and sizes for all manner of purposes were designed and built.

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Section: To 1959mentioning

confidence: 99%

History of Impactors—The First 110 Years

Marple

2004

Aerosol Science and Technology

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“…Several impaction parameters (Ranz and Wong, 1952) can affect impactor collection efficiency. The methods for predicting the par-tick collection charactcristics of an impactor also have becn studied extensively (Mercer and Chow, 1968;Marple et al, 1974;Rader and Marple, 1985;Lec et al, 1990). Marple et al (1974) studied the effects of various parameters on the flow field and the collection efficiencies of rectangular and round typc impactors.…”

Section: Correapondmg Duthormentioning

confidence: 99%

A Study on the Electrohydrodynamic Flow in a Rectangular Impactor with Positive Corona Discharge

Jeong

Kim

1998

Aerosol Science and Technology

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“…This is the value of √S tk corresponding to d 50 , the value of particle diameter collected with 50% efficiency. Based on earlier works and data available in literature [6][7][8] , we have designed the four stages of the cascade impactor and calculated the cut-off diameter of the particle in different stages as given in the Table 1.…”

Section: Design and Constructionmentioning

confidence: 99%