• 제목/요약/키워드: 전산유체(CFD)

검색결과 2,433건 처리시간 0.026초

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

  • 김철완;장병희;이장연
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2005년도 춘계 학술대회논문집
    • /
    • pp.114-118
    • /
    • 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.

  • PDF

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

  • 이승수
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2003년도 추계 학술대회논문집
    • /
    • pp.89-94
    • /
    • 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.

  • PDF

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

  • 손창현;김상훈;우희규
    • 한국항공우주학회지
    • /
    • 제49권4호
    • /
    • pp.263-272
    • /
    • 2021
  • 본 논문은 외장 분리 풍동시험 기법을 적용한 전산유체해석을 통하여 획득한 데이터와 풍동시험을 통하여 획득한 데이터를 비교 연구한 것이다. 전산유체해석은 하모닉 방정식을 적용한 비정상해석 기법을 사용하여 수행하였으며, 비정상 해석으로부터 외장의 공력계수들과 6 자유도 외장 분리 시뮬레이션을 위한 공력 데이터베이스를 생성하였다. 해당 데이터베이스와 풍동시험 기반 데이터베이스를 이용한 외장의 분리 궤적 시뮬레이션 수행하였으며, 그 결과를 비행시험 결과와 비교하였다. 비교를 통하여 시뮬레이션의 적절성을 확인하였으며, 외장 분리 풍동시험 기법을 전산유체해석에 적용하여 획득한 외장 분리 공력 데이터베이스는 외장분리 궤적 시뮬레이션 적용에 타당함을 확인하였다.

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

  • 김사량
    • 한국전산유체공학회지
    • /
    • 제18권2호
    • /
    • pp.72-77
    • /
    • 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.

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

  • 이인수;임효남;최재웅
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2011년 춘계학술대회논문집
    • /
    • pp.179-182
    • /
    • 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.

  • PDF

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

  • 조금원;박형우;이상산
    • 한국전산유체공학회:학술대회논문집
    • /
    • 한국전산유체공학회 2001년도 추계 학술대회논문집
    • /
    • pp.174-181
    • /
    • 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.

  • PDF