Modeling of Laminar-Turbulent Transition for High Freestream Turbulence  

Oleh:

Steelant, J. ; Dick, E.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 123 no. 1 (2001), page 22-30.
Topik: laminar; modeling; laminar - turbulent; transition; freestream; turbulence

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

To simulate transitional skin friction or heat transfer, the conditionally averaged Navier - Stokes equations are used. To describe the diffusion of freestream turbulence into the boundary layer and the intermittent laminar - turbulent flow behaviour during transition, a turbulence weighting factor T is used. A transport equation is presented for this T - factor including convection, diffusion, production, and sink terms. In combination with the conditioned Navier - Stokes equations, this leads to an accurate calculation of flow characteristics within the transitional layer. The method is validated on transitional skin friction and heat transfer measurements, respectively on a flat plate and in a linear turbine cascade.

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