A nonintrusive optical technique for

1
Mutiple Beam Spectroscopy for Liquid Rocket
Engine Diagnostics Science Research
Laboratory Somerville, MA
A non-intrusive optical technique for
measuring velocity of luminous gases
INNOVATION

• ACCOMPLISHMENTS
• An image of the gas was divided into narrow
  strips and
  directed into alternate photodetectors. The
  frequency
  difference of the two measured light intensities
  shows the gas
• velocity
• An instrument using tranmission gratings and a
  new three-cube
  beamsplitter was engineered, fabricated
• and tested in Phase11
• Complete instrument, and calibration equipment
  delivered
• to NASA Glenn for study of rocket engine exhausts
  
• COMMERCIALIZATION
• An instrument is on loan to microcoating
  Technologies,
• who are marketing a novel combustion coating
  system for
• possible inclusion in the control system of their
  product
• Instrument based on the same principle is being
  fabricated for the Federal Highway Administration
  (FHWA)

Automated ice protection system

• GOVERNMENT /SCIENCE APPLICATIONS
• Based on this SBIR an instrument was fabricated
  and delivered to the Plasma Fusion Center at MIT
  and used for
• diagnostics on the Alcator Tokamak
• The Technique has been extended to nonluminous
  gases. Such measurements were made for NASA
  Langley and for
• Arnold AFB. SRL has now proposed to deliver a
  velocimeter to the FHWA to map the air flow in
  their wind tunnel

1988 Phase 2 SS-34

10/17/95
Lewis Research Center