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건국대학교 충격파 풍동의 성능 해석에 관한 수치적 연구
탁정수(Jeong-Soo Tak),변영환(Yung-Hwan Byun),이재우(Ja-Woo Lee),이장연(Jang-Yeon Lee),허철준(Chul-Jun Huh),최병철(Byung-Chul Choi) 한국전산유체공학회 2000 한국전산유체공학회 학술대회논문집 Vol.2000 No.5
Two-dimensional Navier-Stokes codes are used to simulate the shock tunnel in Konkuk university. In order to design experiments in impulse facilities properly and to interpret data from such facilities, it is necessary to understand how the flow approaches steady state. This is done by determining the transient flow field and flow establishment time around a given model. This will be accomplished by developing appropriate CFD codes which solve the Navier-Stokes equations, and simulating the starting process and resulting unsteady viscous flow phenomena. The starting process in a shock tunnel consists of multiple shock interactions and contact discontinuities, which are difficult to solve with the classical shock capturing schemes. A recently developed. high resolution scheme is adapted for resolving the unsteady phenomena of those multiple shock interactions and contact surfaces during the starting process. The bifurcation phenomenon due to the interactions of the reflected shock from the end of the shock tube with the boundary layer generated by the incident shock becomes of particular interest. By comparing with the experiment results, the accuracy of the numerical analysis is validated and it is demonstrated that the properties which can hardly be obtained through the experiment can be estimated.