Modeling of Rough Wall Boundary Layers with an Intermittency Transport Model

• Autorzy: Elsner W. , Warzecha P.
• Języki publikacji: EN

Abstrakty

EN

The paper presents a new extension of the -Ret model to account for both the laminar-turbulent transition and the surface roughness. The new modeling approach takes into account the pressure gradient, turbulence intensity and roughness height and density. In the transition region both the intermittency transport equation and the momentum thickness Reynolds number Ret transport equation, supplemented by the correlation of Stripf et al. (2009) suitable for rough wall boundary layers are used. An additional modification of the SST turbulence model allows for modeling a full turbulent boundary layer over surfaces with sand roughness. A comprehensive validation of the new method using transitional and fully turbulent test cases was performed. Flat plate data with a zero and non-zero pressure gradient test case as well as a high pressure turbine blade case were used for this purpose The studies proved that the new modeling approach appeared to be sufficiently precise and enabled a qualitative prediction of the boundary layer development for the tested flow configurations.

Słowa kluczowe

EN

surface roughness; boundary layer; turbulence; transition modeling

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2010
• Tom: Vol. 14, No 3
• Strony: 271--282
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Elsner W.

autor

Warzecha P.

• Institute of Thermal Machinery, Czestochowa University of Technology, Al. Armii Krajowej 21, 42-200 Częstochowa, Poland,

Bibliografia

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