Accession Number : ADD016295

Title :   Interferometric JFTOT Tube Deposit Measuring Device.

Descriptive Note : Patent, Filed 30 Jun 92, patented 8 Mar 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Morris, Robert E ; Wagner, Robert

Report Date : 08 Mar 1994

Pagination or Media Count : 166

Abstract : Jet fuels are tested for thermal stability by passing the fuel over a heated metal tube and measuring the amount of residue deposited as a film on the tube as a result of chemical changes to the fuel. The thickness distribution and volume of a deposited film on a tube are calculated by scanning the length of the tube with an optical probe, shining light onto the tube, measuring the intensity of reflected light of a preselected wavelength from the tube, and correlating the reflected light intensity with positions on the tube. The tube is then partially rotated, and the process is repeated until the entire surface of the tube is scanned. The volumes of each longitudinal slice of the tube are summed to give the total deposit volume on the tube.

Descriptors :   *DEPOSITS, *FILMS, *JET ENGINE FUELS, *INTERFEROMETERS, *PATENTS, *MEASURING INSTRUMENTS, *OXIDATION, *THERMAL PROPERTIES, CHEMICALS, DISTRIBUTION, INTENSITY, LENGTH, LIGHT, METALS, PROBES, RESIDUES, SCANNING, STABILITY, SURFACES, THERMAL STABILITY, THICKNESS, VOLUME, TEST AND EVALUATION, OPTICAL EQUIPMENT, ROTATION, RESIDUES

Subject Categories : Fuels
      Thermodynamics
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE