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김장우,권병철 한밭대학교 생산기반기술연구소 2001 생산기반기술연구소 논문집 Vol.1 No.1
This Paper presents numerical solutions of the Euler equations for supersonic unsteady flows in a two-dimensional simple Scramjet model with heat addition. The Van Leer FVS(flux vector splitting) method in generalized coordinates is employed in order to calculate inviscid strong shock waves caused by thermal choking. Results show that the adverse pressure gradient induced by heat addition brings about formation of the normal shock wave and the specific thrust decreases with fluctuation. We prove that thermal choking is a serious problem for engine Performance.
축소-확대 유로에서의 가열에 의한 비정상 유동의 특성에 관한 연구
김장우,정진도,Kim, Jang-Woo,Chung, Jin-Do 대한기계학회 2002 大韓機械學會論文集B Vol.26 No.6
This Paper presents numerical solutions of two-dimensional Euler equations for supersonic steady and unsteady flows with heat addition in a convergent-divergent duct, The Van Leer FVS (flux vector splitting) method in generalized coordinates is employed in order to calculate the inviscid strong shock waves caused by thermal choking. We discuss on transient characteristics, start and unstart phenomena caused by thermal choking, limit of equivalence ratio to avoid thermal choking and fluctuation of specific thrust caused by thermal choking. We prove that thermal choking is a serious problem in view of engine performance.