Laboratory Simulation of Smoke Reduction from Aircraft Engine Test Cell Exhaust Using a Fluidized Bed Filter.
Final rept. 1 Jun 83-31 Aug 84,
CLEMSON UNIV SC DEPT OF CHEMICAL ENGINEERING
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The lowering of aircraft engine test cell exhaust opacity by fluidized bed filtration of soot was simulated in the laboratory. Smoke from a diesel burner was diluted with ambient air and passed through a 25 cm diameter cylindrical bed of either 500 or 1000 micron glass spheres. Bed depths ranging from 2.5 to 10 cm and superficial gas velocities of 2 to 60 cms were studied. Using separate light-sources and photocell detectors, the optical densities of the bed inlet and outlet gas streams were simultaneously monitored. From these data percentage opacity reduction POR values were determined as a function of time. This measure of filtration efficiency was found to increase with bed depth, ranging from roughly 50 for a 2.5 cm deep bed of 1100 micron glass beads to 99 for a 10 cm deep bed of 500 micron beads. No appreciable decline in effectiveness was observed for periods of up to 1.5 hours. Attempts were made to supplement POR results with gravimetric measurements of particle loading and size distribution made using a stack gas sampler inertial impactor.
- Civil Engineering
- Combustion and Ignition