Classic gas turbine design relies on the definition of a design point, and the subsequent assessment of the design on a range of off-design conditions. On the design point, both component sizing (e.g., in terms of physical dimensions or in terms of map scaling parameters) and a solution to the off-design governing equations are established. With this approach, it is however difficult to capture the contradicting requirements on the full operating envelope. After all, the design is formalized on a single operating condition. For instance, if a top-of-climb condition is selected as single design point, then the desired turbine inlet temperature in take-off conditions may be tricky to prescribe. On the other hand, when selecting take-off conditions as design point, then the climb and cruise operation may be less efficient than desired. Thus, practical design efforts rely on various multi-point design approaches. This paper introduces several of them, including definitions of the operating envelope (I.e., the operating cases considered). Application examples are given both on a conventional geared turbofan and hybrid electric variants such as a parallel hybrid and/or an electrically driven ducted fan on a serial hybrid. The results of the classic design point approach are compared to those of multi-point approaches.

 


Introduction to Multi-Point Design Strategies for Aero Engines

Division / Sponsor:
International Gas Turbine Institute (IGTI)

Paper Proceedings: https://asmedigitalcollection.asme.org/GT/GT2020/volume/84058

Turbo Expo - Virtual Conference

Supporting the need among researchers worldwide for additional online and multimedia content, ASME now offers the ASME Conference Video Collection. This platform will collect and provide long-term access to conference presentation videos, encompassing all technology areas within ASME's technical conference and events program. About 30,000-40,000 engineers across all mechanical engineering and related disciplines participate in ASME conferences each year. This includes authors of approximately 6,000 to 8,000 technical papers published by ASME, the majority of whom also submit video presentations for our virtual conferences. The video collection will be available as an add-on to existing product packages or as a separate subscription.