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Title: Viscous computation of steady/unsteady transonic diffuser flows
Authors: Xiao, Q. 
Tsai, H.M. 
Liu, F.
Issue Date: 2002
Citation: Xiao, Q., Tsai, H.M., Liu, F. (2002). Viscous computation of steady/unsteady transonic diffuser flows. 32nd AIAA Fluid Dynamics Conference and Exhibit. ScholarBank@NUS Repository.
Abstract: The lag model proposed by Olsen and Coakley (2001) is applied to simulate the steady and unsteady transonic flows in a diffuser. The unsteady flows are induced by imposing fluctuating back-pressures. A fully implicit time-accurate multigrid algorithm is used for solving the Navier-Stokes equations and the coupled k-ω turbulence model equations. Two test cases are investigated, one with a weak shock in the channel corresponding to a static-to-total pressure ratio Rp=0.82 at the diffuser exit and the other with a strong shock corresponding to Rp=0.72. The results with the implementation of the lag model are closer to the experimental data for the strong-shock case. However, the computational results are almost the same with and without the lag model for the weak-shock case. © 2002 by the author.
Source Title: 32nd AIAA Fluid Dynamics Conference and Exhibit
ISBN: 9781624101137
Appears in Collections:Staff Publications

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