COLD-AIR PERFORMANCE OF COMPRESSOR-DRIVE TURBINE OF DEPARTMENT OF ENERGY UPGRADED AUTOMOBILE GAS TURBINE ENGINE 3: PERFORMANCE OF REDESIGNED TURBINE

The aerodynamic performance of a redesigned compressor drive turbine of the gas turbine engine is determined in air at nominal inlet conditions of 325 K and 0.8 bar absolute. The turbine is designed with a lower flow factor, higher rotor reaction and a redesigned inlet volute compared to the first turbine. Comparisions between this turbine and the originally designed turbine show about 2.3 percentage points improvement in efficiency at the same rotor tip clearance. Two versions of the same rotor are tested: (1) an as cast rotor, and (2) the same rotor with reduced surface roughness. The effect of reducing surface roughness is about one half percentage point improvement in efficiency. Tests made to determine the effect of Reynolds number on the turbine performance show no effect for the range from 100,000 to 500,000.

• Corporate Authors:

  National Aeronautics and Space Administration

  600 Independence Avenue, SW
  Washington, DC  United States  20546
• Authors:
  • Roelke, R J
  • Haas, J E
• Publication Date: 1984-1

Media Info

• Pagination: 40 p.

Subject/Index Terms

• TRT Terms: Aerodynamics; Cold weather; Compressors; Gas turbines; Performance; Reynolds number; Turbine engines; Vehicle power plants
• Old TRIS Terms: Automobile engines
• Subject Areas: Highways; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00390670
• Record Type: Publication
• Report/Paper Numbers: NAS 1.15:83627
• Files: TRIS
• Created Date: Jan 30 1985 12:00AM