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  • Fluid Mechanics and Thermodynamics  (2)
  • Aeronautics (General); Engineering (General)  (1)
  • Aircraft Design, Testing and Performance; Fluid Mechanics and Thermodynamics  (1)
  • COMPUTER PROGRAMMING AND SOFTWARE  (1)
  • 1
    Publication Date: 2013-08-31
    Description: Viewgraphs on 3-dimensional Euler solutions using automated Cartesian grid generation are presented. Topics covered include: computational fluid dynamics (CFD) and the design cycle; Cartesian grid strategy; structured body fit; grid generation; prolate spheroid; and ONERA M6 wing.
    Keywords: COMPUTER PROGRAMMING AND SOFTWARE
    Type: NASA. Langley Research Center, Unstructured Grid Generation Techniques and Software; p 251-260
    Format: application/pdf
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  • 2
    Publication Date: 2019-07-18
    Description: Continuous improvement of aerospace product development processes is a driving requirement across much of the aerospace community. As up to 90% of the cost of an aerospace product is committed during the first 10% of the development cycle, there is a strong emphasis on capturing, creating, and communicating better information (both requirements and performance) early in the product development process. The community has responded by pursuing the development of computer-based systems designed to enhance the decision-making capabilities of product development individuals and teams. Recently, the historical foci on sharing the geometrical representation and on configuration management are being augmented: Physics-based analysis tools for filling the design space database; Distributed computational resources to reduce response time and cost; Web-based technologies to relieve machine-dependence; and Artificial intelligence technologies to accelerate processes and reduce process variability. Activities such as the Advanced Design Technologies Testbed (ADTT) project at NASA Ames Research Center study the strengths and weaknesses of the technologies supporting each of these trends, as well as the overall impact of the combination of these trends on a product development event. Lessons learned and recommendations for future activities will be reported.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: 8th International Symposium on Computational Fluid Dynamics; Sep 05, 1999 - Sep 10, 1999; Bremen; Germany|8th International Symposium on Computational Fluid Dynamics; Aug 30, 1999; Stockholm; Sweden|8th International Symposium on Computational Fluid Dynamics; Sep 03, 1999; Aachen; Germany
    Format: text
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  • 3
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    In:  CASI
    Publication Date: 2019-08-08
    Description: Presentation for Oshkosh 2019 describing UAM research at NASA
    Keywords: Aeronautics (General); Engineering (General)
    Type: ARC-E-DAA-TN70709 , EAA Airventure 2019; Jul 22, 2019 - Jul 28, 2019; Oshkosh, WI; United States
    Format: application/pdf
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  • 4
    Publication Date: 2019-07-13
    Description: This paper describes the process used for estimating flow-through balance momentum tares. The interaction of jet engine exhausts on the BOEINGERA Hybrid Wing Body (HWB) was simulated in the NFAC 40x80 wind tunnel at NASA Ames using a pair of turbine powered simulators (TPS). High-pressure air was passed through a flow-through balance and manifold before being delivered to the TPS units. The force and moment tares that result from the internal shear and pressure distribution were estimated using CFD. Validation of the CFD simulations for these complex internal flows is a challenge, given limited experimental data due to the complications of the internal geometry. Two CFD validation efforts are documented, and comparisons with experimental data from the final model installation are provided.
    Keywords: Aircraft Design, Testing and Performance; Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN28731 , AIAA Science and Technology Forum and Exposition (SciTech 2016); Jan 04, 2016 - Jan 08, 2016; San Diego, CA; United States
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  • 5
    Publication Date: 2019-07-13
    Description: The urgent need for dramatic reductions in aircraft design cycle time is focusing scrutiny upon all aspects of computational fluid dynamics (CFD). These reductions will most likely come not from increased reliance upon user-interactive (and therefore time-expensive) methods, but instead from methods that can be fully automated and incorporated into 'black box' solutions. In comparison with tetrahedral methods, three-dimensional Cartesian grid approaches are in relative infancy, but initial experiences with automated Cartesian techniques are quite promising. Our research is targeted at furthering the development of Cartesian methods so that they can become key elements of a completely automatic grid generation/flow solution procedure applicable to the Euler analysis of complex aircraft geometries.
    Keywords: Fluid Mechanics and Thermodynamics
    Type: NASA Lewis Surface Modeling and Grid Generation Workshop; May 09, 1995 - May 11, 1995; Cleveland, OH; United States
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