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|Title:||Computation of transonic diffuser flows by a lagged κ-ω turbulence model||Authors:||Xiao, Q.
|Issue Date:||May-2003||Citation:||Xiao, Q.,Tsai, H.M.,Liu, F. (2003-05). Computation of transonic diffuser flows by a lagged κ-ω turbulence model. Journal of Propulsion and Power 19 (3) : 473-483. ScholarBank@NUS Repository.||Abstract:||The lag model proposed by Olsen and Coakley is applied in combination with the baseline κ-ω two-equation turbulence model to simulate the steady and unsteady transonic flows in a diffuser. A fully implicit time-accurate multigrid algorithm is used to solve the unsteady Navier-Stokes equations and the coupled κ-ω turbulence model equations. Two test cases are investigated, one with a weak shock in the channel corresponding to an exit-static-to-inlet-total pressure ratio Rp=0.82 and the other with a strong shock corresponding to Rp=0.72. Unsteady flows are induced by imposing fluctuating backpressure. Computational results are compared with experimental data and demonstrate notable improvement by the lag model for flows with strong shock-boundary-layer interactions.||Source Title:||Journal of Propulsion and Power||URI:||http://scholarbank.nus.edu.sg/handle/10635/115654||ISSN:||07484658|
|Appears in Collections:||Staff Publications|
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