서지주요정보
정규 격자계를 이용한 2차원 날개단면 주위의 비압축성 난류유동의 수치해석 = Numerical analysis of incompressible turbulent flows over a two-dimensional airfoil using a regular grid system
서명 / 저자 정규 격자계를 이용한 2차원 날개단면 주위의 비압축성 난류유동의 수치해석 = Numerical analysis of incompressible turbulent flows over a two-dimensional airfoil using a regular grid system / 김기섭.
저자명 김기섭 ; Kim, Ki-Sup
발행사항 [대전 : 한국과학기술원, 1995].
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소장정보

등록번호

8005463

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 95008

휴대폰 전송

도서상태

이용가능

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초록정보

A finite volume method for solving two-dimensional, incompressible, steady, Reynolds time-averaged equations is developed using a regular grid in a non-orthogonal body-fitted coordinate system. The numerical pressure fluctuation usually encountered in the regular grid is suppressed by a momentum interpolation method. The conservation of physical quantities at the branch-cut, adopted in the present study in a C-type grid system is successfully satisfied by applying the zonal approach. A suitable differencing scheme for convection terms is very important for obtaining a reasonable numerical solution for the complex turbulent flow around an airfoil in a general coordinate system. Three different differencing schemes are tested to compare their characteristics: hybrid scheme, linear upwind differencing scheme(LUDS) and second-order upwind-central differencing-first-order upwind (SOUCUP). In order to include the turbulent intermittency effect on the asymmetric wake flow behind the airfoil, the κ-ε-$\gamma$ equations proposed by Cho & Chung have been numerically solved. The eddy viscosity is estimated by a function of κ, ε and $\gamma$. The results are compared with the available experimental data and with the results obtained by the standard κ-ε model. The turbulent intermittency affects considerably on the spreading rate of the wake and causes faster recovery of the wake center line velocity behind the airfoil, in comparison with that from the standard κ-ε model.

서지기타정보

서지기타정보
청구기호 {DME 95008
형태사항 xvii, 118 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : A, SOUCUP scheme의 defferedcorrection 방법
저자명의 영문표기 : Ki-Sup Kim
지도교수의 한글표기 : 정명균
지도교수의 영문표기 : Myung-Kyoon Chung
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학과,
서지주기 참고문헌 : p. 47-53
주제 Aerofoils.
Viscous flow.
Intermittent-motion mechanisms.
Air flow.
난류. --과학기술용어시소러스
에어포일. --과학기술용어시소러스
점성류. --과학기술용어시소러스
간헐류. --과학기술용어시소러스
비압축성 흐름. --과학기술용어시소러스
Turbulence.
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