Design and Application of a Multidisciplinary Predesign Process for Novel Engine Concepts

Author:

Reitenbach Stanislaus1,Krumme Alexander1,Behrendt Thomas1,Schnös Markus1,Schmidt Thomas2,Hönig Sandrine2,Mischke Robert3,Mörland Erwin4

Affiliation:

1. German Aerospace Center, Institute of Propulsion Technology, Linder Hoehe, Cologne D-51147, Germany e-mail:

2. German Aerospace Center, Institute of Structures and Design, Pfaffenwaldring 38-40, Stuttgart D-70569, Germany e-mail:

3. German Aerospace Center, Simulation and Software Technology, Linder Hoehe, Cologne D-51147, Germany e-mail:

4. German Aerospace Center, Institute of Systems Architectures in Aeronautics, Hein-Saß-Weg 22, Hamburg D-21129, Germany e-mail:

Abstract

The purpose of this paper is to present a multidisciplinary predesign process and its application to three aero-engine models. First, a twin spool mixed flow turbofan engine model is created for validation purposes. The second and third engine models investigated comprise future engine concepts: a counter rotating open rotor (CROR) and an ultrahigh bypass turbofan. The turbofan used for validation is based on publicly available reference data from manufacturing and emission certification. At first, the identified interfaces and constraints of the entire predesign process are presented. An important factor of complexity in this highly iterative procedure is the intricate data flow, as well as the extensive amount of data transferred between all involved disciplines and among different fidelity levels applied within the design phases. To cope with the inherent complexity, data modeling techniques have been applied to explicitly determine required data structures of those complex systems. The resulting data model characterizing the components of a gas turbine and their relationships in the design process is presented in detail. Based on the data model, the entire engine predesign process is presented. Starting with the definition of a flight mission scenario and resulting top level engine requirements, thermodynamic engine performance models are developed. By means of these thermodynamic models, a detailed engine component predesign is conducted. The aerodynamic and structural design of the engine components are executed using a stepwise increase in level of detail and are continuously evaluated in context of the overall engine system.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

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