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Measurement in multiphase reacting flowsA survey is presented of diagnostic techniques and measurements made in multiphase reacting flows. The special problems encountered by the presence of liquid droplets, soot and solid particles in high temperature chemically reacting turbulent environments are outlined. The principal measurement techniques that have been tested in spray flames are spark photography, laser anemometry, thermocouples and suction probes. Spark photography provides measurement of drop size, drop size distribution, drop velocity, and angle of flight. Photographs are analysed automatically by image analysers. Photographic techniques are reliable, inexpensive and proved. Laser anemometers have been developed for simultaneous measurement of velocity and size of individual particles in sprays under conditions of vaporization and combustion. Particle/gas velocity differentials, particle Reynolds numbers, local drag coefficients and direct measurement of vaporization rates can be made by laser anemometry. Gas temperature in sprays is determined by direct in situ measurement of time constants immediately prior to measurement with compensation and signal analysis by micro-processors. Gas concentration is measured by suction probes and gas phase chromatography. Measurements of particle size, particle velocity, gas temperature, and gas concentration made in airblast and pressure atomised liquid spray flames are presented.
Document ID
19790035512
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chigier, N. A.
(Sheffield, University Sheffield, United Kingdom)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AD-A070007
AIAA PAPER 79-0082
AFOSR-TR-79-0657
Meeting Information
Meeting: American Institute of Aeronautics and Astronautics, Aerospace Sciences Meeting
Location: New Orleans, LA
Start Date: January 15, 1979
End Date: January 17, 1979
Sponsors: American Institute of Aeronautics, Astronautics
Accession Number
79A19525
Funding Number(s)
PROJECT: PROJECT SQUID
Distribution Limits
Public
Copyright
Other

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