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titleToward the Development of Measurement Integrated Simulation
Author(jpn)加藤, 博司; 大林, 茂
Author(eng)Kato, Hiroshi; Obayashi, Shigeru
Author Affiliation(jpn)東北大学流体科学研究所; 東北大学流体科学研究所
Author Affiliation(eng)Institute of Fluid Science, Tohoku University; Institute of Fluid Science, Tohoku University
Issue Date2013-11-30
Publisher宇宙航空研究開発機構(JAXA)
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料
JAXA Special Publication
VolumeJAXA-SP-13-001E
Start page229
End page241
Publication date2013-11-30
Languageeng
AbstractIn this research, the ensemble Kalman filter, a data assimilation method, is employed to estimate the turbulent viscosity for the flow field around the RAE2822 airfoil. The turbulent viscosity is estimated directly from the experimental pressure distribution on the airfoil, without a turbulence model. The turbulent viscosity estimated by the ensemble Kalman filter shows lower magnitude around the airfoil than that estimated with the Spalart-Allmaras turbulence model and is almost zero in the wake region. Computation with the estimated turbulent viscosity can predict the separated flow region at the shock-boundary layer interaction. Due to this separation, the computed pressure coefficient agrees better with the experiment. These results suggest that this data assimilation method can be used to estimate the turbulent viscosity without a turbulence model.
Description形態: カラー図版あり
Meeting Information: 5th Symposium on Integrating CFD and Experiments in Aerodynamics (October 3-5, 2012, Chofu Aerospace Center, Japan Aerospace Exploration Agency (JAXA)), Chofu, Tokyo, Japan
Physical characteristics: Original contains color illustrations
KeywordsEFD/CFD; measurement integrated simulation; data assimilation; turbulence model
Document TypeConference Paper
JAXA Category特別資料
NASA Subject CategoryFluid Mechanics and Thermodynamics
ISSN1349-113X
NCIDAA11984031
SHI-NOAA0062070017
Report NoJAXA-SP-13-001E
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/20440


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