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Analysis of the aerodynamic off-design characteristics of the multidiscipline optimized M=1.6 CISAP configuration

Herrmann, U. (2004) Analysis of the aerodynamic off-design characteristics of the multidiscipline optimized M=1.6 CISAP configuration. DLR-Interner Bericht. 124-2004/23, 49 S.

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Abstract

The analysis of the optimized supersonic configurations at supersonic off-design, at transonic as well as low-speed conditions shows: The alternate supersonic load case found to be more realistic by other partners in this work package generates higher aerodynamic loads. Although the flow needs to produce higher lift coefficients no significant flow separations are found. Therefore such flows can still be predicted using inviscid method keeping the numerical effort within the MDO process low. The lower fidelity aerodynamic performance estimations implemented in the MDO process for transonic cruise is found to slightly under predict the configurations performance estimated by viscous methods. Meeting the aerodynamic low-speed performance estimated by the lower fidelity model in the MDO process is found to be quite adequate for the approach flight phase. During climb out the stated performance values are viewed as very challenging and the empirical model is assessed as too optimistic for the analysed configuration. This holds even if the low-speed performance of the implemented high-lift system could be increased mainly by increasing the leading edge flap size.

Document Type:Monograph (DLR-Interner Bericht)
Additional Information: LIDO-Berichtsjahr=2005,
Title:Analysis of the aerodynamic off-design characteristics of the multidiscipline optimized M=1.6 CISAP configuration
Authors:
AuthorsInstitution or Email of Authors
Herrmann, U.UNSPECIFIED
Date:2004
Number of Pages:49
Status:Published
Keywords:Off-design analysis, TAU Navier-Stokes computations, high-lift system design
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Concepts & Integration
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:31 Jan 2006
Last Modified:14 Jan 2010 19:49

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