A Dynamic Data Integration Approach to Build Scientific Workflow Systems

Bachmann, Arne; Kunde, Markus; Litz, Markus; Schreiber, Andreas

doi:10.1109/gpc.2009.15

Cited by 14 publications

(8 citation statements)

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“…It was introduced mainly to serve as a common language between the disciplinary analysis tools. Two software libraries 6 called TiXI d and TiGL e are being developed to ease the use of CPACS. While TiXI provides a simple interface to create, read, modify, and write CPACS datasets, TiGL generates a CAD f model of the aircraft and offers methods to query geometric data from this model.…”

Section: Introductionmentioning

confidence: 99%

Conceptual Design and Aerodynamic Analyses of a Generic UCAV Configuration

Liersch

Huber

2014

32nd AIAA Applied Aerodynamics Conference

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Applying DLR's conceptual aircraft design system to military flying wing configurations, the design of a generic UCAV configuration is presented. For its outer shape, the SACCON geometry specified by NATO STO/AVT-161 Task Group was taken. For mission analysis and structural sizing, aerodynamic data from fast and robust conceptual design methods (i.e. potential flow theory) were used. In order to assess the validity of these simple methods for such configurations, a comparison with results from RANS aerodynamics and wind tunnel measurements was performed. The results of this design task were included into the stability and control investigations performed within the AVT-201 task group. Nomenclature C A Axial force coefficient [−] C D Drag force coefficient [−] C L Lift force coefficient [−] C N Normal force coefficient [−] C S Body-fixed side force coefficient [−] C Y Side force coefficient [−] C l Rolling moment coefficient [−] C m Pitching moment coefficient [−] C mx Body-fixed X-moment coefficient [−] C my Body-fixed Y-moment coefficient [−] C mz Body-fixed Z-moment coefficient [−] C n Yawing moment coefficient [−] I xx Mass moment of inertia (X-axis) [−] I yy Mass moment of inertia (Y-axis) [−] I zz Mass moment of inertia (Z-axis) [−] V Freestream velocity [ m s ] p, q, r Rotation rates (X, Y , Z-axis) [ • s ] Conventions X, Y, Z Coordinate system Symbols α Angle of attack [ • ] β Angle of yaw [ • ]

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Section: Introductionmentioning

confidence: 99%

Conceptual Design and Aerodynamic Analyses of a Generic UCAV Configuration

Liersch

Huber

2014

32nd AIAA Applied Aerodynamics Conference

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“…However, to simplify the application of CPACS and to cover its special features (e.g. integration of external data files), DLR has developed a special support library called TIXI [28] (TIVA XML Interface). TIXI is based on the free libxml2 library [29] and can be used with various programming languages on several different platforms.…”

Section: Cpacs Wing Shape Definitionmentioning

confidence: 99%

“…A second library, called TIGL (TIVA Geometry Library) [28], was developed to simplify the access to the parametric geometry model. Based on the free Open CASCADE CAD library [30], TIGL generates a 3D model from a CPACS aircraft geometry definition and provides high-level functions to query data from this model.…”

Section: Cpacs Wing Shape Definitionmentioning

confidence: 99%

A distributed toolbox for multidisciplinary preliminary aircraft design

Liersch

Hepperle

2011

CEAS Aeronaut J

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In 2005, the German Aerospace Center (DLR) started an internal project, called TIVA, with the main goal to strengthen the multidisciplinary collaboration in the field of conceptual aircraft design. This approach was intended not only to couple disciplinary analysis tools from different institutes, but also to establish a process which keeps the disciplinary experts in the loop as well. Linking the tools and corresponding experts, this process should finally enable each discipline to study the consequences of their new concepts and technologies on overall aircraft level. One major component of this process is a new data exchange file format called CPACS, which serves as central interface and common language between the disciplinary analysis tools. The second key component is the integration framework, which allows the user to couple the single tools to multidisciplinary process chains for analysis and optimization tasks. Since the end of the TIVA project in 2009, the system is continuously being enhanced and extended in TIVA's successor-project VAMP, as well as in several other research projects which are based on this technology. For the near future, it is further planned to open the system with its major components to external partners and to use it for common projects with Industry and Universities.

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“…This is standardized data model and a special XML-file developed by the German Aerospace Center (DLR). To read the CPACS data the wrapper python packages TIXI and TIGL [66] are used. As of today, CPACS files are not able to handle hybridelectric aircraft.…”

Section: Aircraft Structuralmentioning

confidence: 99%

A Framework for Optimization of Hybrid Aircraft

Zhao

Sahoo

Kyprianidis

et al. 2019

Volume 3: Coal, Biomass, Hydrogen, and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organ

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To achieve the goals of substantial improvements in efficiency and emissions set by Flightpath 2050, fundamentally different concepts are required. As one of the most promising solutions, electrification of the aircraft primary propulsion is currently a prime focus of research and development. Unconventional propulsion sub-systems, mainly the electrical power system, associated thermal management system and transmission system, provide a variety of options for integration in the existing propulsion systems. Different combinations of the gas turbine and the unconventional propulsion sub-systems introduce different configurations and operation control strategies. The trade-off between the use of the two energy sources, jet fuel and electrical energy, is primarily a result of the trade-offs between efficiencies and sizing characteristics of these sub-systems. The aircraft structure and performance are the final carrier of these trade-offs. Hence, full design space exploration of various hybrid derivatives requires global investigation of the entire aircraft considering these key propulsion sub-systems and the aircraft structure and performance, as well as their interactions. This paper presents a recent contribution of the development for a physics-based simulation and optimization platform for hybrid electric aircraft conceptual design. Modeling of each subsystem and the aircraft structure are described as well as the aircraft performance modeling and integration technique. With a focus on the key propulsion sub-systems, aircraft structure and performance that interfaces with existing conceptual design frameworks, this platform aims at full design space exploration of various hybrid concepts at a low TRL level.

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A Dynamic Data Integration Approach to Build Scientific Workflow Systems

Cited by 14 publications

References 0 publications

Conceptual Design and Aerodynamic Analyses of a Generic UCAV Configuration

Conceptual Design and Aerodynamic Analyses of a Generic UCAV Configuration

A distributed toolbox for multidisciplinary preliminary aircraft design

A Framework for Optimization of Hybrid Aircraft

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