Premixing-prevaporizing fuel systems were evaluated for use with a catalytic reactor for possible automotive gas turbine application. Spatial fuel-air distributions, degree of vaporization, pressure drop and air velocity profiles were measured. Three airblast injectors and an air-assist nozzle were tested. Air swirlers were used to improve the spatial fuel-air distribution. The work was done in a 12 cm tubular duct. Test conditions were: a pressure of 0.3 and 0.5 MPa, inlet air temperatures (up to 800 exp 0 K, air velocities of 10 and 20 m/s and fuel-air ratios up to 0.020. The fuel was Jet A. The best results were obtained with an air-blast configuration that used multiple cones to provide high velocity air for atomization and also straightened the inlet airflow. With this configuration, uniform spatial fuel-air distributions were obtained with mixing lengths greater than 17.8 cm. In this length, vaporization of the fuel was 98.5% complete at an inlet air temperature of 700 exp 0 K. The total pressure loss was 1.0% with a reference velocity of 20 m/s and 0.25% at 10 m/s. The air velocity was uniform across the duct and no autoignition reactions were observed. (ERA citation 03:043230)

  • Corporate Authors:

    Department of the Navy

    The Pentagon
    Washington, DC  United States  20350

    Department of Energy

    1000 Independence Avenue, SW
    Washington, DC  United States  20585
  • Authors:
    • Tacina, R R
  • Publication Date: 1977

Media Info

  • Pagination: 21 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00185650
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: NASA-TM-78856
  • Contract Numbers: EX-76-A-31-1011
  • Files: TRIS
  • Created Date: Dec 29 1979 12:00AM