http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Euler 방정식을 사용한 익형 주위에서의 유동장 해석
김문상(M.S. Kim) 한국전산유체공학회 1999 한국전산유체공학회 학술대회논문집 Vol.1999 No.-
An Euler solver is developed to predict accurate aerodynamic data such as lift coefficient, drag coefficient. and moment coefficient. The conservation law form of the compressible Euler equations are used in the generalized curvilinear coordinates system, The Euler solver uses a finite volume method and the second order Roe's flux difference splitting scheme with min-mod flux limiter to calculate the fluxes accurately, An implicit scheme which includes the boundary conditions is implemented to accelerate the convergence rate. The multi-block grid is integrated into the flow solver for complex geometry. The flowfields are analyzed around NACA 0012 airfoil in the cases of M∞=0.75, a=2.0 and M∞=0.80, a=1.25. The numerical results are compared with other numerical results from the literature. The final goal of this research is to prepare a robust and an efficient Navier-Stokes solver eventually.
장조원,전창수,김문상,이열,문희장,송병흠,김학봉,Chang, J.W.,Jeon, C.S.,Kim, M.S.,Lee, Y.,Moon, H.J.,Song, B.H.,Kim, H.B. 한국항공운항학회 2005 한국항공운항학회지 Vol.13 No.4
A closed-circuit type wind tunnel is designed, which has a test section with the dimensions $1.2(W){\times}1.2(H){\times}3.4(L)$. A subsonic wind tunnel is designed to improves educational circumstances and promote ground tests. It is constituted of an exchangeable test section, first and second diffusers, a fan, a settling chamber, a contraction, and 4 corners. The maximum velocity in the test section is 70m/s and the contraction ratio is 6.25:1. Input power in the wind tunnel is about 96.1 kw (128.8 hp) and its energy ratio is 3.89. It has the dimension of about $7.4(W){\times}3.6(H){\times}21.7m(L)$. The wind tunnel designed in this investigation will be an effective educational and investigational equipment.