PROBLEMS AND PROGRESS IN DEVELOPING THE AUTOMOTIVE GAS TURBINE

While there are no dramatic breakthroughs to announce, steady progress is being made in the evolution of a commercially viable automotive gas turbine. This article highlights some of the main points that were discussed by a panel of experts at the recent Vehicular Gas Turbine Forum in Philadelphia (March, 1977). Increased turbine inlet temperatures, and the use of a single-shaft machine (reducing parasitic losses) can lead to a considerable improvement in fuel economy. To tolerate an idle to full-speed response of the order of 1 sec, a ceramic radial turbine is essential to obtain a lower polar moment of inertia and to allow design stresses over 40,000 psi (275 MPa). Higher operating temperatures tend also to eliminate the gas turbine emissions problem. Numerous research establishments are busy developing ceramic components for high-temperature vehicular gas turbines. In most cases, these components are flame tubes, nozzle rings, and turbine rotors. Some research problems and experiences with ceramic materials are reported, both for turbine components and casing insulation. The General Motors 404/505 (300 hp/390 hp), all-metal truck and bus engine is also described.

  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  United States  10016-5990
  • Publication Date: 1978-5

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Filing Info

  • Accession Number: 00183957
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Dec 29 1978 12:00AM