ADVANCED GAS TURBINE (AGT) POWER-TRAIN SYSTEM. FOURTH SEMINANNUAL REPORT FOR WORK PERFORMED FROM 1 JULY 1981-31 DECEMBER 1981

Technical work on the design and component testing of a 74.5 kW (100 hp) advanced automotive gas turbine is described for the period of July through December 1981. This is the fourth semi-annual report. In general, the effort was in finalizing the design for an engine to be tested in mid-1982, in continuing selected component testing, and in ceramic component design, testing, and procurement. In response to an accelerated build schedule, all castings and 62% of purchased parts were in-house by the end of December. Compressor tests of a modified rotor showed high-speed performance improvement over previous rotor designs; efficiency improved by 2.5%, corrected flow by 4.6%, and pressure ratio by 11.6% at 100% speed. Aerodynamic design has been completed for both the gasifier and power turbines. Ceramic (silicon carbide) gasifier rotors were spin tested to failure in a continuing series of tests. Results show improving strengths as indicated by burst speeds, and the latest group of five rotors failed at speeds between 104% and 116% of engine rated speed. From four alternate combustor concepts, one was selected for further study. The emission results from combustor testing showed NOx levels to be nearly one order of magnitude lower than with previous designs. A one-piece ceramic exhaust duct/regenerator seal platform has been designed with acceptably low stress levels. A control system for the first engine run has been designed, and fabrication of some elements has begun.

• Corporate Authors:

  Detroit Diesel Allison

  P.O. Box 894
  Indianapolis, Indiana,   United States  46206

  Department of the Navy

  The Pentagon
  Washington, DC  United States  20350

  Department of Energy

  Office of Vehicle and Engine Research and Development
  Washington, DC  United States  20585
• Authors:
  • HELMS, H E
  • Johnson, R A
  • Gibson, R K
• Publication Date: 1982-2

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 57 p.

Subject/Index Terms

• TRT Terms: Ceramic materials; Engines; Fuel consumption; Gas turbines; Performance; Power trains; Turbine engines; Vehicle design
• Uncontrolled Terms: Performance analysis
• Old TRIS Terms: Engine design
• Subject Areas: Design; Energy; Highways; Vehicles and Equipment; I91: Vehicle Design and Safety; I95: Vehicle Inspection;

Filing Info

• Accession Number: 00380966
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: EDR 10977, HS-035 390, DOE/NASA/0168-82/4
• Contract Numbers: DEN 3-168
• Files: HSL, TRIS, USDOT
• Created Date: Jan 30 1984 12:00AM