Development of an Alternative Concentration Probe Calibration Method
Abstract
Aspirating, hot wire concentration probes are used to measure point- wise binary species concentrations in supersonic gaseous flow fields. Calibration of such probes is usually carried out by exposing the probe to a known mixture as it discharges from a fixed volume (or tank). A new, steady flow method for the calibration of helium/air concentration probes has been developed and has been compared with an existing tank discharge method. The two calibration curves have been found to be in close agreement, with a difference of 0.05 helium molar fraction between them for given a value of wire heat loss. Probe design is suspected of being responsible for this slight variation in helium molar fraction. Hence, either method can be used for calibration of such probes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1989
- Accession Number
- ADA216245
Entities
People
- George R. Stoller Jr.
Organizations
- Air Force Institute of Technology