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  • 1
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    Design of a slotted, natural-laminar-flow airfoil for commercial transport applications (2020)
    Elsevier
    Details
    Publication Date: 2020-11-01
    Print ISSN: 1270-9638
    Electronic ISSN: 1626-3219
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Elsevier
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    PAPER CURRENT
  • 2
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    Contributions to HiLiftPW-3 Using Structured, Overset Grid Methods (2018)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The High-Lift Common Research Model (HL-CRM) and the JAXA Standard Model (JSM) were analyzed computationally using both the OVERFLOW and LAVA codes for the third AIAA High-Lift Prediction Workshop. Geometry descriptions and the test cases simulated are described. With the HL-CRM, the effects of surface smoothness during grid projection and the effect of partially sealing a flap gap were studied. Grid refinement studies were performed at two angles of attack using both codes. For the JSM, simulations were performed with and without the nacelle/pylon. Without the nacelle/pylon, evidence of multiple solutions was observed when a quadratic constitutive relation is used in the turbulence modeling; however, using time-accurate simulation seemed to alleviate this issue. With the nacelle/pylon, no evidence of multiple solutions was observed. Laminar-turbulent transition modeling was applied to both JSM configuration, and had an overall favorable impact on the lift predictions.
    Keywords: Fluid Mechanics and Thermodynamics; Aerodynamics
    Type: ARC-E-DAA-TN52245 , AIAA SciTech 2018; Jan 08, 2018 - Jan 12, 2018; Kissimmee, FL; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    OVERFLOW Contribution to HiLiftPW-3 (2017)
    In:  CASI
    Details
    Publication Date: 2019-09-13
    Description: No abstract available
    Keywords: Aerodynamics; Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN43288 , AIAA CFD (Computational Fluid Dynamics) High Lift Prediction Workshop (HiLiftPW-3) ; Jun 03, 2017 - Jun 04, 2017; Denver, CO; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    OVERFLOW Contribution to HiLiftPW-3 (2017)
    In:  CASI
    Details
    Publication Date: 2019-09-13
    Description: We plan to perform the following sets of computations: For all our contributions (except where stated) Code: OVERFLOW, Turbulence model: SAnegRCQCR2000. - 1. Results will be submitted for both the full chord flap gap (Case 1a) and partially-sealed Chord Flap gap (Case 1c): 1. Grid Refinement Study; 2. Grids: structured overset grids supplied by HiLiftPW committee; 3. Connectivity: Domain Connectivity Framework, DCF. - 2. Results will be submitted for JAXA Standard Model and Nacelle/Pylon Off (Case 2a), Nacelle/Pylon On (Case 2c): 1. Alpha Study; 2. Grids: structured overset grids supplied by HiLiftPW committee; 3. Connectivity: Pegasus 5 (Peg5). - 3. A study of the effects of different connectivity paradigms: 1. DCF vs Peg5 for HLCRM cases; 2. DCF vs. C3P (NASA Ames) vs. Peg5 for JSM cases; 3. JSM grids will be the focus where we will hopefully see some type of trends with reference to wind tunnel data. - 4. Adaption cases will be attempted for (and submitted where appropriate): 1. Cases 1c,1d: HLCRM; 2. Cases 2c and 2d: JSM; 3. Grid: Near Body grids provided by committee, OffBody grids Cartesian; 4. AMR NearBody and OffBody Adaption. - 5. Case 3 Turbulence model verification study: 1. Grid: Series of 3 finest grids as defined on http://turbmodels.larc.nasa.gov/airfoilwakeverif.html; 2. Turbulence models: SAneg and SAneg RCQCR2000. OVERFLOW 2.2 is a Reynolds-averaged Navier-Stokes (RANS) code developed by NASA...
    Keywords: Fluid Mechanics and Thermodynamics
    Type: ARC-E-DAA-TN41734 , AIAA CFD High Lift Prediction Workshop (HiLiftPW-3); Jun 03, 2017 - Jun 04, 2017; Denver, CO; United States
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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