An examination of some design considerations of gas turbine automobile engines is made including an overview of the unsolved problems. Emphasis is placed on the design and manufacturing aspects.Performance penalties due to size effects are discussed. The gains in cycle thermal efficiency with increasing peak temperatures are examined in view of these penalties. A cursory investigation of thermal efficiency is performed on a 75 horsepower and a 150 horsepower gas turbine. This was done considering both current and advanced design and manufacturing technology with regard to rotor clearances and blade thicknesses. Design and manufacturing limits used in defining the penalties in engines with advanced technology are qualified.This investigation indicates an improvement of about 15 percent in thermal efficiency due to increasing the peak cycle temperature from 1850°F to 2500°F for a gas turbine engine suitable for an automobile but requiring advanced technology. It was also found that the size effects between 150 horsepower and 75 horsepower only result in about a 2 percent penalty. With current design and manufacturing technology, the increase in thermal efficiency reduces from 15 to 10 percent assuming that ceramics can be utilized to achieve a 2500°F turbine inlet temperature. If a ceramic turbine rotor does not become a reality and the cycle temperature is thereby limited by the capability of some type of metallic rotor, then the gain in thermal efficiency further reduces to about 5 percent.


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    Titel :

    Some Design Considerations of Automotive Gas Turbines


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    1979 Automotive Engineering Congress and Exposition ; 1979



    Erscheinungsdatum :

    01.02.1979




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Some design considerations of automotive gas turbines

    Mercure,R.A. / Dep.of Energ.,Div.of Transp.Energ.Conserv.,US | Kraftfahrwesen | 1979



    Considerations in design and development of turbines for automotive gas turbine engines

    Amann, C.A. / Dawson, D.W. / Yu, M.K. | Engineering Index Backfile | 1963


    Considerations in the Design and Development of Turbines for Automotive Gas Turbine Engines

    Amann, Charles A. / Dawson, David W. / Yu, Mason K. | SAE Technical Papers | 1963