| Abstract: | The integral relations, the algebraic model, and the family of differential turbulence models widely used in theoretical and practical boundary layers studies are considered. The differential turbulence models are analyzed for fully developed incompressible-fluid flow in three regions: the viscous sublayer, the logarithmic layer, and the flow core. Numerical results are compared with analytical and experimental dependences. The numerical results for the boundary layer in a liquid rocket engine (LRE) nozzle, where compressibility, the temperature factor, and flow acceleration are significant, are presented. Recommendations on the applicability of the turbulence models considered are given. Moscow. Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No. 1, pp. 44–58, January–February, 1998. The work received financial support from the Russian Foundation for Fundamental Research (project No.96-01-00260). |
