| Abstract: | Nonlinear evolution of hydroelastic instability arising in the flow past a coating of a rubber-type material by a turbulent
boundary layer of an incompressible fluid is studied. A nonlinear dispersion equation for two-dimensional, quasi-monochromatic,
low-amplitude waves is derived. The Prandtl equations for the mean (over the waviness period) boundary-layer flow are solved
in the approximation of local similarity and by direct numerical integration. Evolution of unstable waves in time is studied
on the basis of the Landau equation, which is derived separately for the instability of fast waves (flutter) and the quasi-static
instability (divergence). The calculation results are compared with available experimental data.
Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod 603600. Translated from Prikladnaya Mekhanika
i Tekhnicheskaya Fizika, Vol. 41, No. 4, pp. 69–80, July–August, 2000. |
