Accession Number:

ADA341915

Title:

Improving Algorithmic Efficiency of Aircraft Engine Design for Optimal Mission Performance

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1998-03-01

Pagination or Media Count:

153.0

Abstract:

Automated techniques for selecting jet engines that minimize overall fuel consumption for a given aircraft mission have recently been developed. However, the current techniques lack the efficiency required by Wright Laboratories. Two noted dependencies between turbine engine fan pressure ratio, bypass ratio, high pressure compressor pressure ratio and overall engine mass flow allows for a reduction in the number of independent design variables searched in the optimization process. Additionally, through the use of spatial statistics specifically kriging estimation, it is possible to significantly reduce the number of time consuming response function evaluations required to obtain an optimal combination of engine parameters. A micro Genetic Algorithm microGA is employed to perform the non linear optimization process with these two computation saving techniques. Optimal engine solutions were obtained. in 25 percent of the time required by previous automated search algorithms.

Subject Categories:

  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE