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  • 1
    facet.materialart.
    Unknown
    Computerized systems analysis and optimization of aircraft engine performance, weight, and life cycle costs (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-27
    Description: The paper describes the computational techniques employed in determining the optimal propulsion systems for future aircraft applications and to identify system tradeoffs and technology requirements. The computer programs used to perform calculations for all the factors that enter into the selection process of determining the optimum combinations of airplanes and engines are examined. Attention is given to the description of the computer codes including NNEP, WATE, LIFCYC, INSTAL, and POD DRG. A process is illustrated by which turbine engines can be evaluated as to fuel consumption, engine weight, cost and installation effects. Examples are shown as to the benefits of variable geometry and of the tradeoff between fuel burned and engine weights. Future plans for further improvements in the analytical modeling of engine systems are also described.
    Keywords: SYSTEMS ANALYSIS
    Type: Symposium on the Use of Computers as a Design Tool; Sept. 3-6, 1979; Munich
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Computerized systems analysis and optimization of aircraft engine performance, weight, and life cycle costs (1979)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The computational techniques utilized to determine the optimum propulsion systems for future aircraft applications and to identify system tradeoffs and technology requirements are described. The characteristics and use of the following computer codes are discussed: (1) NNEP - a very general cycle analysis code that can assemble an arbitrary matrix fans, turbines, ducts, shafts, etc., into a complete gas turbine engine and compute on- and off-design thermodynamic performance; (2) WATE - a preliminary design procedure for calculating engine weight using the component characteristics determined by NNEP; (3) POD DRG - a table look-up program to calculate wave and friction drag of nacelles; (4) LIFCYC - a computer code developed to calculate life cycle costs of engines based on the output from WATE; and (5) INSTAL - a computer code developed to calculate installation effects, inlet performance and inlet weight. Examples are given to illustrate how these computer techniques can be applied to analyze and optimize propulsion system fuel consumption, weight, and cost for representative types of aircraft and missions.
    Keywords: SYSTEMS ANALYSIS
    Type: NASA-TM-79221 , E-112 , Flight Mech. Panel. Symp. on the Use of Computers as a Design Tool; Sep 03, 1979 - Sep 06, 1979; Munich; Germany
    Format: application/pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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