Multi-Point Design and Optimization of a Turboshaft Engine for a Tiltwing Turboelectric VTOL Air Taxi

Chapman, Jeffryes W

关键词: DESIGN ANALYSIS;    DESIGN OPTIMIZATION;    ENGINE DESIGN;    TURBOSHAFTS;    TILT WING AIRCRAFT;    VERTICAL TAKEOFF AIRCRAFT;    PRESSURE RATIO;    PROPELLERS;    ELECTRIFIED AIRCRAFT PROPULSION;    TURBOGENERATORS;    ELECTRIC MOTORS;    GAS TURBINE ENGINES;    COOLING;    MISSION PLANNING;   

RP-ID  :  GRC-E-DAA-TN62826

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

This paper describes the design of a turboshaft engine for a tiltwing air taxi application. In this case, the tiltwing air taxi is intended to fly a 400-nautical mile mission with up to fifteen passengers. Engine requirements for the concept engine are taken from aircraft system studies where thrust is produced by four propellers driven by electric motors and powered by a single gas turbine engine. The purpose of this paper is to perform a cycle design optimization that minimizes fuel consumption and weight while respecting current technology limitations to meet mission requirements. To achieve results, the engine overall pressure ratio and maximum temperature at the exit of the combustor are set as the design parameters. Several sensitivity studies are also performed to visualize optimization trends. Results of the optimization study show solutions are heavily dependent on engine cooling flow requirements and exact mission requirements. This engine is intended for use in large system optimization research.