EXPERIMENTAL EVALUATION OF TWO PREMIXING-PREVAPORIZING FUEL INJECTION CONCEPTS FOR A GAS TURBINE CATALYTIC COMBUSTOR

A premixing-prevaporizing fuel system to be used with a catalytic combustor was evaluated for possible application in an automotive gas turbine. Spatial fuel distribution and degree of vaporization were measured using jet A fuel. Two types of air blast injectors were tested, a splash groove injector and a multiple jet cross stream injector. Air swirlers with vane angles of 15 deg and 30 deg were used to improve the spatial fuel distribution in a 12 cm diameter tubular rig. Distribution and vaporization measurements were made 35.5 cm downstream of the injector. The spatial fuel distribution was nearly uniform with the multiple jet contrastream injector and the splash-groove injector with a 30 deg air swirler. The vaporization was nearly 100 percent at an inlet air temperature of 600 K, and at 800 K inlet air temperature fuel oxidation reactions were observed. The total pressure loss was less than 0.5 percent of the total pressure for the multiple jet cross stream injector and the splash groove injector (without air swirler) and less than 1 percent for the splash groove with a 30 deg air swirler. (Author)

• Supplemental Notes:
  • Presented at Catalytic Combustor Workshop, Raleigh, N.C., May 25-26, 1976; Sponsored by EPA.
• Corporate Authors:

  Department of the Navy

  The Pentagon
  Washington, DC  United States  20350
• Authors:
  • Tacina, R
• Publication Date: 1976

Media Info

• Pagination: 15 p.

Subject/Index Terms

• TRT Terms: Air; Combustion; Combustion chambers; Flames; Flow; Flow fields; Fuel injection; Gas turbines; Jet engines; Oxidation; Physical distribution; Temperature; Turbine engines; Volatilization
• Uncontrolled Terms: Air flow
• Old TRIS Terms: Air jets; Gas mixtures; Jet flow; Premixed flames
• Subject Areas: Freight Transportation; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00143133
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NASA-TM-X-73422
• Files: TRIS
• Created Date: Oct 6 1976 12:00AM