Accession Number : ADA258822


Title :   Development of an Engine/Airframe Performance Matching Scheme for Jet Engine Retrofit


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : Lach, Alan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258822.pdf


Report Date : Dec 1992


Pagination or Media Count : 155


Abstract : This investigation developed a procedure and new analysis tools for identifying retrofit engine designs for use in existing airframes. The goal was to find a replacement engine for the air-to-air fighter, AAF, developed in the textbook Aircraft Engine Design. This paper introduced the ideas of solution surfaces, constraint/thrust diagrams, quality measures and linear regression analysis for the engine design problem. It considered the application of the jet engine design software ACSYS, MISS, and ONX along with statistical analysis software, SAS. Modeling techniques and linear regression analysis were used to minimize iteration while searching a wide range of design variables. Improvements to the design point engine selection process were made through the development of quality measures for choosing appropriate values for bypass ratio and compressor pressure ratio. The analysis tools were assembled into a design scheme for engine retrofit which was then demonstrated with a two-variable and a six-variable design example. The result of the study determined a new baseline engine design for the AAF with increased thrust and decreased fuel consumption. This design process was developed for use by design students in the academic environment.... Aircraft, Engines, Jet engines, Jet engine design, Design, Aircraft/Engine design, Engine analysis, Engine retrofit, Teaching engine design, Modeling techniques.


Descriptors :   *AIRCRAFT ENGINES , *JET ENGINES , *LINEAR REGRESSION ANALYSIS , *FUEL CONSUMPTION , *RETROFITTING , *COMPRESSION RATIO , FIGHTER AIRCRAFT , RATIOS , REPLACEMENT , THRUST , DIAGRAMS , COMPRESSORS , VALUE , AIRFRAMES , FUELS , ENVIRONMENTS , STUDENTS


Subject Categories : Attack and Fighter Aircraft
      Research and Experimental Aircraft
      Mfg & Industrial Eng & Control of Product Sys
      Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE