Methodology Study for the Development of a Passive Sampler for Fire-Released Carbon Fibers.
Abstract
A passive carbon fiber sampler was developed for in-plume sampling (near the source) of fire-released carbon fibers. The sampler was designed to operate in a high temperature turbulent environment and sample a high flux of soot and fibers without overloading and losing efficiency. Wind tunnel tests for the aerodynamics of the airflow through the sampling orifice were conducted for tunnel air speeds from 2.1 to 37.1 m/sec. The data from these tests indicate that airflow through the sampling orifice was near isokinetic when the tunnel air speed was <6 m/sec. When the tunnel air speed was >6 m/sec, a 16 percent over-isokinetic condition was observed. Also, wind tunnel tests of sampling efficiency were conducted with carbon fibers 5 mm long and 8 microns in diameter. For the efficiency tests, the wind tunnel air speeds were 3.0, 4.2, and 6.5 m/sec with the sampler positioned at 0, 30, and 45 deg from the direction of the tunnel airflow. The new sampler was compared to the standard DPG nylon mesh sampler and a recovery fraction of 0.94 was obtained from the efficiency test. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1980
- Accession Number
- ADA090096
Entities
People
- F. L. Carter
- John H. Whiting
- William A. Peterson