• Title/Summary/Keyword: 전산유체(CFD)

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CFD Study on Aerodynamic Characteristics of Frisbee (II) (CFD를 이용한 Frisbee의 공력 특성에 대한 고찰(II))

  • Kim C. W.;Chang B. H.;Lee J. Y.
    • 한국전산유체공학회:학술대회논문집
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    • 2005.04a
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    • pp.114-118
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    • 2005
  • CFD simulation was peformed for 2D and 3D flying and rotating frisbees. Multiple reference method(MRF) was utilized to consider the rotation of 3D model. Geometry change of 2D model shows dramatic increase of lift, but 3D simulation results for geometry change show decrease of lift and drag. Ground effect increases the lift of the frisbee being close to ground.

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Application of MSAP to JDAM Separation from an F/A-l8C Aircraft (MSAP을 이용한 F/A-l8C로부터 JDAM 분리 해석)

  • Lee Seungsoo
    • 한국전산유체공학회:학술대회논문집
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    • 2003.08a
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    • pp.89-94
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    • 2003
  • A successful store separation analysis tool, MSAP(Multi-body Separation Analysis Program) has been applied to F/A-18C/JDAM CFD Challenge II. The challenge was devised to challenge CFD community to use CFD methodologies to predict and match the trajectory of a JDAM MK-84 separating from F/A-l8C. Trajectory simulations for two flight conditions were performed. Comparison between computed and measured flight trajectories for both conditions shows a good agreement.

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Application of Store Separation Wind Tunnel Test Technique into CFD (외장분리 풍동시험 기법의 전산유체해석 적용)

  • Son, Chang-Hyeon;Kim, Sang-Hun;Woo, Heekyu
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.49 no.4
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    • pp.263-272
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    • 2021
  • In this study, aerodynamic coefficients obtained from Computational Fluid Dynamics (CFD) using wind tunnel test-like method is compared with coefficients obtained by actual wind tunnel test. Unsteady analysis has performed with using harmonic equation for motion of the external store. Aerodynamic database is generated based on CFD results to simulate 6 degree-of-freedom store separation analysis. Trajectory is obtained from simulation using both CFD-based and test-based database, and results are compared with trajectory from flight test result. It is concluded that generation of database based on CFD with wind tunnel test technique is valid from good agreement of the trajectory.

DEVELOPMENT OF THE PRE-PROCESSOR FOR CFD (CFD용 전처리장치 개발)

  • Kim, S.R.
    • Journal of computational fluids engineering
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    • v.18 no.2
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    • pp.72-77
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    • 2013
  • The Pre-processor program for CFD is being developed using wxWidgets and OpenGL libraries. This program can be run on both Windows and Linux operating systems. Undergraduate students and beginners can learn and use this very easily by menu and templates. Until now, structured mesh can be created in Cartesian or Cylindrical coordinates. This program will be used easily to make various type of meshes using templates.

The evaluative study of window defrost using Computational Fluid Dynamics (CFD를 이용한 Window Defrosting 평가)

  • Lee, I.S.;Im, H.N;Choi, J.W.
    • 한국전산유체공학회:학술대회논문집
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    • 2011.05a
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    • pp.179-182
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    • 2011
  • The purpose of this study is to evaluate a defrost model for the possibility of defrosting on wheelhouse window and the heat capacity if defrosting nozzle by using the commercial CFD solver FLUENT. A detailed simulation model has been created which contains the defrosting nozzle, window and the interior/exterior forced convection boundary. In this numerical study, the heat and mass transfer coupled during defrosting and investigated the defrost time for different hot gas temperature, external wind speed and temperature condition.

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Computational Fluid Dynamics Research based on National Grid Project (국가 그리드 구축을 통한 전산유체역학 연구)

  • Cho Kum Won;Park Hyungwoo;Lee Sangsan
    • 한국전산유체공학회:학술대회논문집
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    • 2001.10a
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    • pp.174-181
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    • 2001
  • The Gird is a communication service that collaborates dispersed high performance computers, large-scale databases and modern equipments so that those can be shared and worked together. In this paper. CFD research based on National Grid project is discussed. To validate the Grid technology, the flow past ONERA M6 wing and the flow past infinite wing are simulated on the National Grid testbed.

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