A generalized computer code referred to as the NAVY/NASA Engine Program (NNEP) was developed for analysis of aircraft gas turbines and has been modified for automotive use. There have been two additions to NNEP to facilitate automotive analysis. These are subroutines for generating preliminary compressor and turbine design characteristics, and for outputting engine performance maps for use with a Driving-Cycle Analysis computer code. Computer simulations have been accomplished using both digital and hybrid computers. While digital simulations are useful where they must be utilized by several different organizations, they do not normally run in real-time without major simplifications: hybrid simulations can operate in real-time. Samples of comparisons of observed and calculated transient performance for an F-100 aircraft turbofan engine simulation are shown and discussed. R&D efforts in turbine materials and coatings are also described. Currently the most promising structural ceramics appear to be Si//3N//4 and SiC, which have the most favorable resistance to thermal shock and are much more oxidation resistant than the superalloys.

Media Info

  • Pagination: p. 56-60
  • Serial:
    • Automotive Engineering
    • Volume: 86
    • Issue Number: 6
    • Publisher: Society of Automotive Engineers (SAE)
    • ISSN: 0098-2571

Subject/Index Terms

Filing Info

  • Accession Number: 00183244
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Dec 12 1978 12:00AM