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ISSN Онлайн: 2642-0554

NUMERICAL STUDY OF SEPARATED FLOW IN A PLANE ASYMMETRIC DIFFUSER

Johan Gullman-Strand
Department of Mechanics, KTH SE-100 44 Stockholm, Sweden

Gustav Amberg
Department of Mechanics, Linne Flow Center, Royal Institute of Technology, Osquars Backe 18, 10044 Stockholm, Sweden

Arne V. Johansson
Linne FLOW Centre, Dept. of Mechanics, Royal Institute of Technology SE-100 44 Stockholm, Sweden

Аннотация

Computations of the turbulent flow through plane asymmetric diffusers (PAD) for opening angles from 8° to 10° have been carried out. The fractional step finite element formulation of Guermond and Quartapelle (1997) for the Reynolds Averaged Navier-Stokes (RANS) equations has been combined with the non-linear Explicit Algebraic Reynolds Stress Model (EARSM) of Wallin and Johansson (2000) and the Wilcox (1993) low Re K-ω formulation. The standard EARSM has been complemented with strain rate based streamline curvature correction (Wallin and Johansson, 2002). The computations are compared to experiments of Tornblom et al. (2002) for 8.5° and Buice and Eaton (2000) for the 10° PAD.