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Virtual aircraft design of transcruiser - Computing break points in pitch moment curve
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0003-4991-5503
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2010 (English)In: 28th AIAA Applied Aerodynamics Conference, 2010, 2010-4366- p.Conference paper (Refereed)
Abstract [en]

The SimSAC project has developed the design software CEASIOM, a framework tool that integrates discipline-specific tools like CAD & grid generation, CFD, stability & control analysis etc. for the purpose of aircraft conceptual design. Significant features developed and integrated in CEASIOM are geometry, aerodynamics, flight dynamics and aeroelasticity modules. The design begins with a design specification and uses conventional design methods to prescribe a baseline configuration. Then CEASIOM improves upon this baseline by analyzing its flying and handling qualities. This paper reports on the Transonic cruiser TCR from baseline design to Tier-I design. The baseline T-tail design is based on the design specification, which is a fairly non-complicated one with the exception for the design cruise speed of Mach 0.97. The flight dynamical analysis in CEASIOM of this configuration showed that trimming the aircraft required too large deflections in the design point so a new approach with a canard configuration was designed. A model of this configuration was built and tested in wind tunnel. The paper focuses on the validation of computational tools of different fidelity, from Tier I to Tier II RANS solvers, with test data to get a range of fidelity of the tools. The results showed that Tier I methods fail to reproduce experimental pitch moment already at moderate angles of attack. Euler methods give reasonably accurate predictions but only RANS offers good overall experimental agreement for all angles attack, in particular at higher angles where the flow starts to separate.

Place, publisher, year, edition, pages
2010. 2010-4366- p.
Keyword [en]
Accurate prediction, Aircraft conceptual designs, Angles of attack, Baseline configurations, Baseline design, Break-points, Canard configuration, Computational tools, Control analysis, Conventional design methods, Cruise speed, Design points, Design softwares, Design specification, Dynamical analysis, Euler method, Grid generation, Handling quality, Large deflection, New approaches, Pitch moment, RANS solver, Specific tool, Test data, Virtual aircrafts
National Category
Vehicle Engineering
URN: urn:nbn:se:kth:diva-149693ScopusID: 2-s2.0-78649519697ISBN: 978-161738926-9OAI: diva2:745276
28th AIAA Applied Aerodynamics Conference, 28 June 2010 through 1 July 2010, Chicago, IL, United States

QC 20140910

Available from: 2014-09-10 Created: 2014-08-26 Last updated: 2014-09-10Bibliographically approved

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