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Numerical simulation of engine/airframe integration for high-bypass engines

Rudnik, R. and Rossow, C.-C. and Geyr, H. von (2002) Numerical simulation of engine/airframe integration for high-bypass engines. Aerospace Science and Technology, 6 (1), pp. 31-42.

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Abstract

Due to a trend towards very high-bypass ratio engines and a corresponding close to coupling of engine and airframe, the minimization of adverse interference effects is an important aspect in aircraft design. Investigations of engine/airframe integration have been carried out within a long-term collaborative European research initiative, starting in 1990 with the programs DUPRIN I, DUPRIN II to the current ENIFAIR and AIRDATA projects. Based on some selected results the contribution highlights major outcomes of the numerical activities accompanying the experimental studies in the aforementioned programs. After a brief introduction to the basic aerodynamic phenomena of engine/airframe interference and the numerical methods in use, the capabilities of the theoretical approach are demonstrated for three aspects: The influence of increasing engine size on the aerodynamic interference is outlined by simulating turbine powered engine simulators (TPS) of different bypass ratio on the ALVAST narrow body wing/fuselage model. Second, the influence of position variations is demonstrated for different engine concepts, representing the major design parameter for influencing engine/airframe interference. Finally, the jet influence is stressed by comparing numerical results for different thrust conditions. The investigations show, that the lift loss, caused by the mounting of engines, is proportional to the engine size. An upstream movement of the engine position alleviates the lift loss, whereas a vertical movement does not have a significant influence. Especially for the VHBR and UHBR concepts the incorporation of the engine jet is essential to assess the aerodynamic interference. In general validated numerical methods are capable to simulate the dominant features of engine/airframe integration.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2002,
Title:Numerical simulation of engine/airframe integration for high-bypass engines
Authors:
AuthorsInstitution or Email of Authors
Rudnik, R.UNSPECIFIED
Rossow, C.-C.UNSPECIFIED
Geyr, H. vonUNSPECIFIED
Date:2002
Journal or Publication Title:Aerospace Science and Technology
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:6
Page Range:pp. 31-42
Status:Published
Keywords:Aerodynamics, CFD, Engine/airframe integration, high-bypass ratio engines, engine position variation
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):L - Flight Physics
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: elib DLR-Beauftragter
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 18:56

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