Experimental and theoretical study of a two-dimensional virtual impactor

Journal Article · Sun Aug 01 00:00:00 EDT 1982 · Environ. Sci. Technol.; (United States)

DOI:https://doi.org/10.1021/es00102a013· OSTI ID:6590194

Forney, L J ^[1]; Ravenhall, D G; Lee, S S

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1. Georgia Inst. of Technology, Atlanta

Experimental results are presented on the operating characteristics of a versatile two-dimensional virtual impactor. The influence of geometry on the particle cutoff diameter, efficiency curve steepness, and properties of the internal particle loss factor are presented. Theoretical solutions to Navier-Stokes equations are used to correlate the data for fixed instrument Reynolds number (Re = 1540) and bleed flow (Q/Q/sub 0/ = 0.1). The theory, supported by trends in the empirical data, predicts that internal particle losses reduce to zero as the normalized void width increases to h/w = 1.4 +/- 0.1, while the data show a minimum of 7% loss at h/w = 1.6 +/- 0.1. Increasing the void width, however, is shown to substantially reduce the steepness of the particle efficiency curves.

• OSTI ID: 6590194
• Journal Information: Environ. Sci. Technol.; (United States), Journal Name: Environ. Sci. Technol.; (United States) Vol. 16:8; ISSN ESTHA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AEROSOLS
AIR POLLUTION
COLLOIDS
DATA
DIFFERENTIAL EQUATIONS
DISPERSIONS
EQUATIONS
EQUIPMENT
GEOMETRY
INFORMATION
MATHEMATICS
NAVIER-STOKES EQUATIONS
NUMERICAL DATA
PARTIAL DIFFERENTIAL EQUATIONS
PARTICLE SIZE CLASSIFIERS
PARTICLES
PARTICULATES
PERFORMANCE
POLLUTION
SOLS
THEORETICAL DATA