Picture of a sphere with binary code

Making Strathclyde research discoverable to the world...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. It exposes Strathclyde's world leading Open Access research to many of the world's leading resource discovery tools, and from there onto the screens of researchers around the world.

Explore Strathclyde Open Access research content

Computation of transonic diffuser flows by a lagged k-omega turbulence model

Xiao, Q. and Tsai, H.M. and Liu, F. (2003) Computation of transonic diffuser flows by a lagged k-omega turbulence model. Journal of Propulsion and Power, 19 (3). pp. 473-483. ISSN 0748-4658

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The lag model proposed by Olsen and Coakley is applied in combination with the baseline k–! 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 k–! turbulence model equations.Two test cases are investigated, one with a weak shock in the channel corresponding to an exit-static-toinlet-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.