The affect of gravity on particle collection in inertial impactors

Conference · Sun Dec 31 23:00:00 EST 1989

OSTI ID:7018358

Marple, V A; Olson, B A ^[1]; Rader, D J ^[2]

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1. Minnesota Univ., Minneapolis, MN (USA). Dept. of Mechanical Engineering
2. Sandia National Labs., Albuquerque, NM (USA)

Gravitational forces have been found to be an important factor in defining the particle collection efficiency curve of inertial impactors for large particles. In general it was found that if the parameter {cflx G} = gW/V{sub 0}{sup 2} (g is the gravitational acceleration, W is the nozzle diameter and V{sub 0} is the average fluid velocity at the nozzle throat) in greater than 10{sup {minus}3}, the efficiency curve would shift to lower particle sizes. No effect could be seen for lower values of {cflx G}. 1 ref., 1 fig., 1 tab.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 7018358
• Report Number(s): SAND-90-1795C; CONF-9009136--2; ON: DE90013372
• Country of Publication: United States
• Language: English

Related Subjects

440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
54 ENVIRONMENTAL SCIENCES
540110*
ACCURACY
AEROSOL MONITORING
AIR POLLUTION MONITORING
AIR SAMPLERS
BOUNDARY LAYERS
DENSITY
DIMENSIONS
EFFICIENCY
EQUIPMENT
FLUID FLOW
GRAVITATION
LAYERS
MONITORING
NOZZLES
PARTICLE SIZE CLASSIFIERS
PARTICLES
PERFORMANCE TESTING
PHYSICAL PROPERTIES
PRESSURE EFFECTS
REYNOLDS NUMBER
SAMPLERS
STOKES LAW
TESTING
VELOCITY